HG/T 3662-2000 Water treatment agent 2-phosphono-1,2,4-tricarboxybutane
Some standard content:
HG/T36622000
In the formulation of this standard, the use needs were mainly considered, the quality data of relevant manufacturers were referred to and verification tests were carried out. Appendix A of this standard is the appendix of the standard.
This standard was proposed by the Technical Supervision Department of the former Ministry of Chemical Industry of the People's Republic of China, and this standard is under the jurisdiction of the Water Treatment Agent Branch of the National Chemical Standardization Technical Committee. The responsible drafting units of this standard are: Wujin Water Quality Stabilizer Factory of Nanjing Institute of Chemical Technology, Water Treatment Technology Service Center of China Petrochemical Corporation, Wujin Fine Chemical Factory, Changzhou Jianghai Chemical Factory, and Wujin Tongde Chemical Factory. The main drafters of this standard are: Chang Chunhua, Wang Jing, Tang Jianyuan, Xu Qun, Gu Qingjun, and Chen Wenchan. 219
1 Scope
Chemical Industry Standard of the People's Republic of China
12-Phosphonobutanem1,2,4-tricarboxylic acid
Water reatment chemicals2-Phosphonobutanem1.2.4-tricarboxylic acid
HG/T 3662.-2000
This standard specifies the requirements, test methods and inspection rules as well as the marking, packaging, transportation and storage of the water treatment agent 2-Phosphonobutanem1,2,4-tricarboxylic acid (PBTC).
This product is mainly used as a scale inhibitor in industrial water treatment. Pure structure:
CCH2-CH2
COOH cOOH
Molecular weight: 270.13 (according to the 1995 international relative atomic mass) 2 Reference standards
The following clauses contain clauses that constitute the clauses of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest versions of the following standards. B191-1990 Pictorial marking for packaging, storage and transportation
GF/601-1988 Preparation of standard solution for titration analysis (volumetric analysis) of chemical reagents GE/T 602 --1988 4
Preparation of standard solution for determination of impurities of chemical reagents (neuISO6353-1:1982) G1/T 6031988 4
Preparation of preparations and products used in test methods of chemical reagents (ne1S6353-1:1982) G1/T1250-1989 Methods for expressing and judging limit values G3/T6678-1986 General rules for sampling of chemical products GB/T66821992 Specifications and test methods for water for analytical laboratories (neqISO3696:1987) 3 Requirements
3.1 Appearance: colorless to light yellow transparent liquid. 3.2 Water treatment agent 2-phosphono-1,2,4-tricarboxybutane shall meet the requirements of Table 1. Approved by the State Administration of Petroleum and Chemical Industry on May 23, 2000 220
Implementation on December 1, 2000
Active component (PBTC), %
Phosphoric acid (as PO4) content, %
Phosphorous acid (as PO4) content, %
PH value (% water bath liquid)
Density (20C).g/m3)
Test method
HC/T3662---2000
First-class product
Qualified product
The reagents and water used in this standard, unless otherwise specified, refer to analytical pure reagents and grade 3 water specified in GB/T6682. The standard solutions, impurity standard solutions, preparations and products required for the test, unless otherwise specified, shall be prepared in accordance with the provisions of GB/T601, GB/T602 and GB/T603.
4.1 Identification
4.1.1 Method Summary
Each carbon atom in 2-phosphono-1,2,4-tricarboxybutane has a specific chemical shift on the C nuclear magnetic resonance spectrum, and its spectrum is different from other water treatment agents. Its characteristic chemical shift is shown in Table 2, and the characteristic spectrum is shown in Appendix A Figure A1. Table 2
Chemical shift
27 ~31, ~37
～50 Bis
175~179
3 methylene carbons
Quaternary carbon connected to phosphorus atom
Carboxyl carbon
2-phosphono-1,2,4-tricarboxybutane contains a phosphorus atom, which has a specific chemical shift in the \P spectrum, which is different from the peak position of phosphorus atoms in other phosphorus-containing compounds and isomers. Its characteristic chemical shift and integrated area percentage should meet the requirements of Table 3. For the characteristic spectrum, please refer to Appendix A Figure A2.
Chemical shift.
Other shifts
4.1.2 Reagents and materials
4.1.2.1 Dioxane
4.1.2.2 Heavy water:
4.1.2.3 Phosphoric acid.
4.1.3 Instruments and equipment
Phosphorus atoms on PBTC
Impurity phosphorus atoms in the sample
Integrated area
Area percentage·%
4.1.3.1 Leaf transform nuclear magnetic resonance instrument: frequency above 60MHz. 4.1.3.2 Sample tube: 5mm outer diameter, about 18cm length tube for carbon spectrum measurement, 10mm outer diameter, about 20cm length tube for phosphorus spectrum measurement. 4.1.4 Analysis steps
4.1.4.1 Carbon spectrum: directly transfer the sample stock solution into the special sample tube for nuclear magnetic resonance measurement. Then add a capillary tube sealed with heavy water for locking. Qualitative determination is carried out under the conditions of broadband decoupling and pulse interval of 3s. The dioxane indirect standard (3-67.8) is used for calibration. The spectrum of the sample should be consistent with Appendix A Figure A1.
HG/T3662—2000
4.1.4.2 Phosphorus spectrum: Continue with the original solution for determination, and lock the field with heavy water. Determine under the conditions of reverse gated decoupling and pulse interval of 30S+85% phosphoric acid as the base (external standard 8°＝0). FID signal is not processed with window function (LB=0). When the height of the main peak (PBTC peak) is as large as 30crm, its base (peak bottom width) should not exceed 1.5 chemical shift units, otherwise the field should be re-set to improve the resolution of the spectrum peak. For small impurity peaks on the base of the main peak, when their integral value is less than 0.5% of the main peak area, their influence on the main peak can be ignored, otherwise the influence of these impurity peaks must be deducted from the main peak integral value.
Integral area percentage (X) is calculated according to formula (1): Ax×100
Wu: Ax21 integral area of the main peak;
A integral area of all peaks in the phosphorus spectrum.
The spectrum of the sample should be consistent with Figure A2 in Appendix A, and the integral area percentage should be greater than 85%. 4.2 Determination of active components
4.2.1 Gravimetric method (arbitration method)
4.2.1.1 Summary of the method
. (1)
2-Phosphono-1,2,4-tricarboxybutane and the orthophosphoric acid and phosphorous acid contained therein are converted into orthophosphoric acid by adding sulfuric acid and a decomposing agent and heating and decomposing. After adding quinoline molybdate solution, quinoline phosphomolybdate precipitate is generated, filtered, washed, dried, weighed, and the total phosphorus content is calculated. The active component is calculated by subtracting the phosphorus content equivalent to orthophosphoric acid and phosphorous acid. 4.2.1.2 Reagents and Materials
4.2.1.2.1 Sulfuric acid solution: 1+4.
4. 2. 1. 2. 2 Nitric acid.
4.2.1.2.3 Nitric acid solution: 1+1.
4.2.1.2.4 Potassium persulfate.
4.2.1.2.5 Quinacridone solution.
Preparation method:
Solution 1: Weigh 70g sodium molybdate and dissolve it in 150mL water. Solution 1: Weigh 60g citric acid and dissolve it in a mixture of 85mL nitric acid (4.2.1.2.2) and 150mL water. Solution II: Weigh 5mL quinoline and dissolve it in a mixture of 35mL nitric acid (4.2.1.2.2) and 100mL water. Under constant stirring, slowly add solution I to solution II. Then slowly add solution III to solution II. Mix well, let stand for 24 hours and filter. Add 280mL acetone to the filtrate, dilute with water to 1000ml, mix well, and store in a brown bottle or polyethylene bottle. 4.2.1.3 Instruments and equipment
General laboratory instruments and crucible filters: filter plate pore size 5um15um. 4.2.1.4 Analysis steps
4.2.1.4.1 Preparation of test solution
Weigh about 4 samples (accurate to 0.0002g) and dissolve in water. Transfer all to a 500mL volumetric flask. Dilute with water to the scale and shake. This is test solution A, which is used to determine the content of active components, orthophosphoric acid, and phosphorous acid. 4.2.1.4.2 Determination
Pipette 10.00ml test solution A and place it in a 400mL tall beaker. Add 10mlL sulfuric acid solution.0.5g～0.7g potassium persulfate, cover the surface, place on a controllable electric furnace and slowly heat until thick smoke is almost gone. The bath liquid is viscous. Carefully observe that when fine crystals just appear, remove and cool (the whole process of decomposition is about 30min. Cover the surface for the first 20min and remove the surface for the last 10min). Add 100ml of water, heat, and when the solution is completely dissolved, cool slightly, add 15ml of nitric acid solution (4.2.1.2.3) and 50ml of aldehyde solution. Cover the surface and place in a boiling water bath for 30min. Cool to room temperature. Shake 34 times during cooling. Filter by decantation using a crucible filter that has been pre-heated to constant weight at (180±5)°C. Wash the precipitate in a beaker three times, using 15ml of water each time, transfer all the precipitate to the crucible filter, and continue washing with water. The total amount of washing water used is about 150ml. Dry at (180 ± 5) °C for 222
451m, cool in a dry place and weigh until the total phosphorus content (X, expressed as mass percentage) is calculated according to formula (2): mX0.0140
m.X10/500
mass of sample + g:
武; m--mass of quinoline phosphomolybdic acid precipitate, g; 0.0140-coefficient of conversion from quinoline phosphomolybdic acid to phosphorus. The active component (PBTC) (X,) expressed as a mass percentage is calculated according to (3): mt
X, (X --X3) X0.326--X.X0.392X8.71 Where: X is the total phosphorus content;
X:--4.3 The measured phosphoric acid (in terms of PO) content: the coefficient of phosphate conversion to phosphorus;
X--4.4 The measured phosphorous acid (in terms of PO) content: 0.392 The coefficient of phosphite conversion to phosphorus; 8.71--The coefficient of phosphorus conversion to active component (PBTC). 4.2.1.6 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference between the two parallel determination results shall not exceed 0.5%. 4.2.2 Volumetric method
4.2.2.1 Method summary
(3)
2-Phosphono-1,2,4-tricarboxybutane is an organic polybasic weak acid, and phenol is used as an indicator (end point pH 8~9), and titrated with sodium hydroxide standard titration solution. At this time, the reaction of 2-phosphono-1,2,4-tricarboxybutane is a tetrabasic acid reaction, and the reaction of orthophosphoric acid and phosphorous acid contained in the sample is a dibasic acid reaction.
4.2.2.2 Reagents and materials
4.2.2.2.1 Sodium hydroxide standard titration solution: c(NaOH) is about 0.5 mol/L. 4.2.2.2.2 Phenolic acid indicator: 10 g/L. 4.2.2.3 Analysis steps
Weigh 1.5g~2.0g of sample (accurate to 0.0002g), place in a 250mL conical flask, add water to 100mL. Add 2 drops of phenolphthalein indicator and titrate with sodium hydroxide standard titration solution until the solution turns slightly red, which is the end point. 4.2.2.4 Expression of analysis results
The active component (PBTC) content (X) expressed as mass percentage is calculated according to formula (4): VeX0. 067 53×1001. 422X;1. 710X.X2
Wherein: c-
actual concentration of sodium hydroxide standard titration solution, mol/L; (4)
volume of sodium hydroxide standard titration solution consumed in titration, mL; V
0.06753-mass of PBTC in grams equivalent to 1.00mL sodium hydroxide standard titration solution Lc(NaOH)-1.000mol/LJ:
X-4.3phosphoric acid content (in PO-) measured; 1.422-coefficient of phosphate conversion to PBTC in acid-base titration; X,-4.4phosphorous acid content (in PO-) measured: 1.710-coefficient of phosphite conversion to PBTC in acid-base titration. 4.2.2.5Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference between the two parallel determination results shall not exceed 0.2%. 223
4.3 Determination of phosphoric acid content
4,3.1 Method summary
HG/T3662-2000
Under acidic conditions, orthophosphoric acid and ammonium molybdate react to form yellow phosphomolybdic heteropoly acid, which is reduced to phosphomolybdic blue with ascorbic acid and measured using a spectrophotometer at the maximum absorption wavelength (710nm). 4.3.2 Reagents and materials
4.3.2.1 Ascorbic acid solution: 20g/1. Weigh 10 ascorbic acid and dissolve it in 50ml of water, add 0.20g disodium ethylenediaminetetraacetic acid and 8mL formic acid, dilute with water to 500ml, and mix well. Store in a brown bottle with a shelf life of 15d. 4.3.2.2 Ammonium molybdate solution: 26/1.
Weigh 13 ammonium molybdate and dissolve it in 200mL water, add 0.5g potassium tartrate and 120mL concentrated sulfuric acid. After cooling, dilute with water to 500ml. Mix. Store in a brown bottle. Shelf life 2 months. 4.3.2.3 Phosphate standard solution: 1mL contains 0.02mgPO4. Prepare according to GB3/T602, pipette 20.00mL, place in a 100mL volumetric flask, dilute with water to the scale, and shake well. Prepare this solution when needed.
4.3.3 Instruments and equipment
General laboratory instruments and
Spectrophotometer: with an absorption cell with a thickness of 1cm. 4.3.4 Analysis steps
4.3.4.1 Drawing of working curve
In 6 50ml volumetric flasks, add 0ml (reagent blank solution), 1.00ml, 2.00ml, 4.00ml, 6.00ml8.00ml phosphate standard solution respectively. Add water to about 25ml respectively, add 2.0ml ammonium phosphate solution and 3.0ml ascorbic acid solution respectively, dilute with water to the scale, shake and place at room temperature for 10m. Use a spectrophotometer with a 1cm absorption cell to measure the absorbance at a wavelength of 710nm with water as the reference. Subtract the absorbance of the blank solution from the absorbance of each standard reference solution, and draw a working curve with the phosphate content (mg) as the horizontal axis and the corresponding absorbance as the vertical axis. 4.3.4.2 Determination
Use a pipette to transfer 5.00 ml of test solution A into a 50 ml volumetric flask, and add water to about 25 ml. In another 50 ml volumetric flask, add 25 ml of water as a blank test solution. Add 2.0 ml of ammonium molybdate solution and 3.0 ml of ascorbic acid solution to each, dilute to the mark with water, shake, and place at room temperature for 10 min.
Use a spectrophotometer with a 1 cm absorption cell, and measure the absorbance at a wavelength of 710 nm with water as the reference. 4.3.5 Expression of analytical results
The content of phosphoric acid (in terms of PO-) expressed as mass percentage (X3) is calculated according to formula (5): ×100 10×(ml/m.)
(mj-ma)X10-3
m×500
wherein: m, the amount of phosphate found from the working curve based on the measured absorbance of the test solution, mgm. - the amount of phosphate found from the working curve based on the measured absorbance of the blank test solution, mg; the mass of the sample?.
4.3.6 It is allowed to take the arithmetic mean of the parallel determination results as the determination result. The absolute difference between the results of two parallel determinations shall not exceed 0.05%. 4.4 Determination of phosphorous acid content
(5)
4.4.1 Summary of the method
Under the condition of pH 7.0~~7.5, iodine oxidizes phosphorous acid to phosphoric acid. Titrate an excess of 224
of iodine with a standard titration solution of sodium thiosulfate.
4.4.2 Reagents and materialsWww.bzxZ.net
HG/T 3662--2000
4.4.2.1 Saturated solution of ammonium pentaborate (NH,BO·4H20). 4.4.2.2 Sulfuric acid solution: 1+3.
4.4.2.3 Standard titration solution of sodium thiosulfate: c(Na2S.0,) about 0.1 mol/L. 4.4.2.4 Iodine solution; c(1/212) about 0.1 mol/L. 4.4.2.5 Soluble starch solution: 10 g/L. 4.4.3 Analysis steps
Pipette 100 mL of test solution A into a 500 mL iodine volumetric flask and add 25 mL of saturated ammonium pentanoate solution. Use a pipette to add 25.00mL iodine solution, immediately cover the bottle stopper, and place it in a dark place for 10min~15min. Add 15mL sulfur solution and titrate with sodium thiosulfate standard titration solution. When the solution turns light yellow, add 1mL-2mL starch indicator solution and continue titrating until the blue disappears. Replace the test solution with 100mL water, add the same volume of all reagents, and perform blank test according to the alternate steps. 4.4.4 Expression of analytical results
The content of phosphoric acid (in terms of PO-) expressed as mass percentage (X) is calculated according to formula (6): X = VV)eX0. 039.5×100
m×500
(Vo--V)cX19.75
Wherein: the volume of sodium thiosulfate standard titration solution consumed in the blank test, mLV - the volume of sodium thiosulfate standard titration solution consumed in the test solution titration, mL; C the actual concentration of sodium thiosulfate standard titration solution, mol/Lm the mass of the sample, more.
(6)
0.0395 - the mass of phosphite in grams equivalent to 1.00 ml of sodium thiosulfate standard titration solution Lc(Nazs2O,)=1.000 moi/L1.
4.4.5 Allowable
Take the arithmetic mean of the parallel determination results as the determination result. The absolute difference between the two parallel determination results shall not exceed 0.2%. 4.5 Determination of pH value
4.5.1 Instruments and equipment
Acidometer: accuracy 0.02 pH unit, equipped with saturated calomel reference electrode, glass measuring electrode or composite electrode. 4.5.2 Analysis steps
Weigh (1.00±0.01)g of sample, transfer all to a 100mL volumetric flask, dilute to the scale with water, and shake well. Pour the test solution into a beaker, place it on an electromagnetic stirrer, immerse the electrode in the solution, and start stirring. Read the pH value on the positioned acidometer.
4.6 Determination of density
4.6.1 Instruments and equipment
4.6.1.1 Density meter: the graduation value is 0.001g/cm. 4.6.1.2 Warm water bath: can be controlled at (20 ± 0.1) C. 4.6.1.3 Glass measuring cylinder: 250 ml.
4.6.1.4 Temperature meter: 0-50 C. Graduation value is 0.1 C. 4.6.2 Analysis steps
Pour the sample into a clean and dry volume cylinder without any bubbles, and place the volume cylinder in a constant overflow water bath at 20°C. After the temperature is constant, slowly place the clean and dry densitometer into the sample, with its lower end at least 2 cm away from the bottom of the cylinder and without contact with the wall of the cylinder. The upper end of the densitometer exposed above the liquid surface should not be stained by more than 2 to 3 scales of liquid. After the densitometer stabilizes in the sample, read the scale 225
HG/T3662-2000
on the lower edge of the meniscus of the densitometer (except for the densitometer marked with a scale for reading the upper edge of the meniscus), which is the density of the 20°C sample. 5 Inspection rules
5.1 All index items specified in this standard are delivery inspection items, and should be inspected batch by batch by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that all products leaving the factory meet the requirements of this standard. 5.2 Use of single The unit has the right to inspect and accept the received products in accordance with the provisions of this standard. 5.3 Each batch of products should not exceed 10t.
5.4 Determine the number of sampling units in accordance with the provisions of GB/T66786.6. When sampling, stir thoroughly first, and use a glass tube or polyethylene plastic tube to insert it into two-thirds of the depth of the barrel to take the sample. The total amount should not be less than 1000mL. Mix thoroughly, divide into two clean, dry bottles with ground stoppers, and seal them. Label the bottles with: manufacturer name, product name, batch number, sampling date and name of the sampler. One bottle is for inspection, and the other bottle is kept for three months for future reference. 5.5 If one indicator does not meet the requirements of this standard during the inspection, re-sampling should be carried out from twice the amount of packaging units. If one of the verification results does not meet the requirements of this standard, the entire batch of products cannot be accepted. 5.6 Use the rounded value comparison method specified in GB/T1250 to determine whether the inspection results meet the requirements. 5.7 When When the supply and demand parties have any objections to the product quality, they shall handle it in accordance with the provisions of the "Product Quality Law of the People's Republic of China". 6 Marking, packaging, transportation and storage
6.1 The packaging barrels of the water treatment agent 2-phosphonic acid-1,2,4-tricarboxybutane should be painted with firm markings, including: manufacturer name, product name, grade, trademark, batch number or production date, net content, factory address and the "upward mark" specified in GB191. 6.2 Each batch of water treatment agent 2-phosphonic acid-1,2,4-tricarboxybutane shipped from the factory should be accompanied by a quality certificate, including: manufacturer name, product name, grade, trademark, batch number or production date, net content, proof that the product quality complies with this standard and the number of this standard. 6.3 The water treatment agent 2-phosphonic acid-1,2.4-tricarboxybutane is packaged in polyethylene plastic barrels with a net weight of 25kg per barrel; or in iron-plastic barrels with a net weight of 200kg per barrel.||t t||6.4 Avoid exposure to sunlight during transportation and store in a ventilated and dry warehouse. 6.5 The storage period of water treatment agent 2-phosphonic acid-1,2,4-tricarboxybutane is one year. 226
HG/T3662
Appendix A
(Standard Appendix)
2-Phosphonic acid-1.2.4-tricarboxybutane NMR spectrum A12-phosphonic acid-12.4-tricarboxybutane 13C NMR Spectrum (Figure A1) Sinopharm Shuangran Xuexue
190180170160150140130120110100Figure A1
HG/T3662-2000
2-Phosphono-1,2,4-tricarboxybutane 3\P NMR spectrum (Figure A2) 42
53688803
CMNE2T
2222226. Determine the number of sampling units according to the provisions of . When sampling, stir thoroughly first, and use a glass tube or polyethylene plastic tube to insert the sample into two-thirds of the barrel depth. The total amount should not be less than 1000mL. Mix thoroughly, divide into two clean, dry bottles with ground stoppers, and seal. Label the bottles with: manufacturer name, product name, batch number, sampling date and name of the sampler. The bottle is for inspection, and the other bottle is kept for three months for reference. 5.5 If one indicator does not meet the requirements of this standard during the inspection, re-sample and verify from twice the amount of packaging units. If one of the verification results does not meet the requirements of this standard, the entire batch of products cannot be accepted. 5.6 Use the rounded value comparison method specified in GB/T1250 to determine whether the inspection results meet the requirements. 5.7 When the supply and demand parties have objections to the product quality, they shall be handled in accordance with the provisions of the "Product Quality Law of the People's Republic of China". 6 Marking, packaging, transportation and storage
6.1 The packaging barrels of water treatment agent 2-phosphono-1,2,4-tricarboxybutane should be firmly marked, including: manufacturer name, product name, grade, trademark, batch number or production date, net content, factory address and the "upward mark" specified in GB191. 6.2 Each batch of water treatment agent 2-phosphono-1,2,4-tricarboxybutane should be accompanied by a quality certificate, including: manufacturer name, product name, grade, trademark, batch number or production date, net content, product quality certification in accordance with this standard and this standard number. 6.3 Water treatment agent 2-phosphono-1,2.4-tricarboxybutane is packaged in polyethylene plastic barrels with a net weight of 25kg per barrel; or in iron plastic barrels with a net weight of 200kg per barrel.
6.4 Prevent exposure to sunlight during transportation and store in a ventilated place In a wind-dried warehouse. 6.5 The storage period of water treatment agent 2-phosphonic acid-1,2,4-tricarboxybutane is one year. 226
HG/T3662
Appendix A
(Appendix of the standard)
2-phosphonic acid-1.2.4-tricarboxybutane NMR spectrum A12-phosphonic acid-12.4-tricarboxybutane 13C NMR spectrum (Figure A1) Pharmaceutical Science
190180170160150140130120110100Figure A1
HG/T3662-2000
2-Phosphono-1,2,4-tricarboxybutane 3\P NMR spectrum (Figure A2)42
53688803
CMNE2T
2222226. Determine the number of sampling units according to the provisions of . When sampling, stir thoroughly first, and use a glass tube or polyethylene plastic tube to insert the sample into two-thirds of the barrel depth. The total amount should not be less than 1000mL. Mix thoroughly, divide into two clean, dry bottles with ground stoppers, and seal. Label the bottles with: manufacturer name, product name, batch number, sampling date and name of the sampler. The bottle is for inspection, and the other bottle is kept for three months for reference. 5.5 If one indicator does not meet the requirements of this standard during the inspection, re-sample and verify from twice the amount of packaging units. If one of the verification results does not meet the requirements of this standard, the entire batch of products cannot be accepted. 5.6 Use the rounded value comparison method specified in GB/T1250 to determine whether the inspection results meet the requirements. 5.7 When the supply and demand parties have objections to the product quality, they shall be handled in accordance with the provisions of the "Product Quality Law of the People's Republic of China". 6 Marking, packaging, transportation and storage
6.1 The packaging barrels of water treatment agent 2-phosphono-1,2,4-tricarboxybutane should be firmly marked, including: manufacturer name, product name, grade, trademark, batch number or production date, net content, factory address and the "upward mark" specified in GB191. 6.2 Each batch of water treatment agent 2-phosphono-1,2,4-tricarboxybutane should be accompanied by a quality certificate, including: manufacturer name, product name, grade, trademark, batch number or production date, net content, product quality certification in accordance with this standard and this standard number. 6.3 Water treatment agent 2-phosphono-1,2.4-tricarboxybutane is packaged in polyethylene plastic barrels with a net weight of 25kg per barrel; or in iron plastic barrels with a net weight of 200kg per barrel.
6.4 Prevent exposure to sunlight during transportation and store in a ventilated place In a wind-dried warehouse. 6.5 The storage period of water treatment agent 2-phosphonic acid-1,2,4-tricarboxybutane is one year. 226
HG/T3662
Appendix A
(Appendix of the standard)
2-phosphonic acid-1.2.4-tricarboxybutane NMR spectrum A12-phosphonic acid-12.4-tricarboxybutane 13C NMR spectrum (Figure A1) Pharmaceutical Science
190180170160150140130120110100Figure A1
HG/T3662-2000
2-Phosphono-1,2,4-tricarboxybutane 3\P NMR spectrum (Figure A2)42
53688803
CMNE2T
222222
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