HG/T 2335-1992 Photographic chemicals 4-[N-ethyl-N-(β-hydroxyethyl)]-2-methylphenylenediamine sulfate (CD-4)
Some standard content:
Chemical Industry Standard of the People's Republic of China
Photographic Chemicals
4-[N-ethyl-N-(β-hydroxyethyl)
-2-methylphenylenediamine sulfate (CD-4))
This product is white or slightly gray powder or granular crystals, soluble in water. Molecular formula: CnH2oN,O,s
Structural formula:
HSO,·HO
Relative molecular mass: 292.34 (according to the international relative atomic mass in 1989) HG/T2335-—92
1 Subject content and scope of application
This standard specifies the technical requirements, test methods, inspection rules, packaging, marking, transportation and storage of photographic chemicals CD-4.
This standard applies to color developer CD-4 used for processing exposed photosensitive materials. 2 Reference standards
Preparation of standard solutions for titration analysis (volume analysis) Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Preparation of standard solutions for impurity determination
Preparation of preparations and products used in test methods General method for determination of melting point rangebzxz.net
Sampling and acceptance rules
Specifications for laboratory water
GB6682
3 Technical requirements
General method for determination of pH value
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CD-4 should meet the following requirements:
Approved by the Ministry of Chemical Industry of the People's Republic of China on June 1, 1992
CAll kinds of standard industry materials are provided free of charge
Implementation on March 1, 1993
Content (CHN, O, S), %
Appearance of solution
Volatile matter, %
Melting point range (melting range 2.0℃), ℃
Ash content, %
Iron (Fe), %| |tt||Heavy metal (in terms of Pb), %
Infrared spectrum
Photographic properties
Test method
HG/T2335-92
150~156
The standard solution for titration analysis, the standard solution for impurity determination and the preparations and products used in this test method are prepared in accordance with the provisions of GB601, GB602 and GB603. The experimental water should meet the specifications of grade 3 water in GB6682. If additional provisions are required, they shall be given in the standard.
4.1 Determination of CD-4 (CmHzN,O,S) content Weigh 0.4g of sample, accurate to 0.0001g, and dissolve in 100mL of water. Add 40mL sulfuric acid (1+9) and 5 drops of 1,10-phenanthroline ferrous indicator solution (5g/L), and titrate with cerium sulfate standard titration solution (c(Ce(SO)2)=0.1mol/L) until the solution turns yellow-green, and perform a blank test at the same time.
The content X, (m/m) of CD-4 (CH2eN,O,S) is calculated according to formula (1): X
Where: y
V)cx0.1462
The amount of sulfuric acid standard titration solution used when titrating the sample, mL; The amount of cerium sulfate standard titration solution used when titrating the blank test, mL; The actual concentration of cerium sulfate standard titration solution, mol/L; The mass of the sample, g;
The mass of CD-4 equivalent to 1.00mL cerium sulfate standard titration solution (c[Ce(SO,),)=1.000mo1/L), expressed in grams.
4.2 Appearance inspection of solution
Weigh 4.9~5.1g of sample, place it in a 100mL colorimetric tube, add 100mL water to dissolve it, the test solution should be light red, clear, without sediment and suspended matter.
4.3 Determination of volatile matter
Weigh 1g of sample, accurate to 0.0001g, place it in a weighing bottle that has been constant weight at 100±5℃, use an oven to dry at 100±5℃ to constant weight (about 1h), cool in a desiccator, weigh, 2
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The content of volatile matter X2 (m/m) is calculated according to formula (2): X
Where: m
Weigh the mass of the weighing bottle plus the sample before drying, g: weigh the mass of the weighing bottle plus the sample after drying, g
Weigh the mass of a weighing bottle, g.
4.4 Determination of pH value
Weigh 5g of sample, accurate to 0.01g,: dissolve in 100mL of water, and determine the pH value of the sample solution at 20℃ according to the provisions of GB9724,
4.5 Determination of melting point range
Take the dried sample in 4.3 and measure it according to the provisions of GB617. 4.6 Determination of ash content
Weigh 2g of sample, accurate to 0.01g, place it in a porcelain with constant weight, heat it on an electric furnace to carbonize, and after the white smoke disappears, burn it in a high-temperature furnace at 600±50℃ to constant weight (about 2h), cool it in a dryer, weigh it, (keep the residue for the determination of iron and heavy metals).
The ash content x (m/m) is calculated according to formula (3): m
Wherein: m2
-the mass of the added residue in the crucible, g;
the mass of the sample in the crucible, g;
-the mass of the crucible, g.
4.7. Determination of Iron (Fe)
Dissolve the residue after calcination (4.6) in 0.5 mL of sulfuric acid and 20 mL of water, add 2 drops of p-nitrophenol indicator solution (2.5 g/L), neutralize with ammonia water to a nearly yellow color, then adjust with dilute ammonia water (1+99) to just yellow, add hydrochloric acid (1+99) dropwise until the solution becomes colorless, then add 0.5 mL in excess, dilute to 50 mL with water, and mix well. This is test solution A. Take 20mL of test solution A in a 50mL colorimetric tube, add 2mL of hydroxylamine hydrochloride (100g/L), shake, let stand for 5min, add 2mL of acetic acid-sodium acetate buffer solution (pH=5) and 2mL of o-phenanthroline solution (2g/L), dilute with water to 50mL and shake. The color of the test solution shall not be darker than the standard. The standard is to take 0.008mg of iron (Fe) impurity standard solution and 20mL of test solution A and treat them in the same way. 4.8 Heavy metals (in terms of Pb)
Put 20mL of test solution A (4.7) in a 50mL colorimetric tube, add 5mL of freshly prepared saturated aqueous solution of hydrogen sulfide to dilute to 50mL, mix well, and place in a dark place for 10min. The dark color of the test solution shall not be darker than the standard. The standard is to take 0.008mg of lead (Pb) impurity standard solution and 20mL of test solution A at the same time and treat them in the same way. 4.9 Identification by infrared spectrum
Put about 2mg of dried sample in an agate mortar and grind it into 2um powder, add about 200mg of dried spectrally pure potassium bromide fine powder, grind it thoroughly and evenly, dry it, and press it into transparent thin sheets on a tablet press. , measure in the range of 4000～400cm- on infrared spectrophotometer, the infrared spectrum obtained shall be consistent with the standard spectrum, standard solution authorized search network a
HG/T2335-92
Wave number (cm\)
CD-4 infrared spectrum
4.10 Photographic performance test
According to the processing formula and process of each manufacturer, the photographic performance of the sample and the standard sample shall be measured in parallel. 5 Inspection rules
5.1 This product shall be inspected by the quality inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer shall ensure that all products leaving the factory meet the requirements of this standard.
5.2 The user has the right to inspect the received products in accordance with the provisions of this standard. 5.3 Sampling shall be carried out in accordance with the provisions of GB619.
5.4 If one of the test results does not meet the requirements of this standard, re-sampling shall be carried out from twice the amount of packaging. The results of re-testing 500
, even if only one indicator does not meet the requirements of this standard, the batch of products cannot be accepted. 5.5 When the supply and demand parties have objections to the product quality, they can resolve the dispute through negotiation. If arbitration is required, it can be handled in accordance with the provisions of the "Interim Measures for National Product Quality Arbitration Inspection".
6 Packaging, marking, transportation, purchase and storage
6.1 Packaging
Inner packaging form:. Sealed black plastic bottle. Net weight of each bottle is 20g. Outer packaging: carton
Special packaging can be negotiated by both parties. 6.2 Mark
The outer packaging box shall be firmly marked with product name, standard number, registered trademark, net weight, gross weight, production batch number, photographic chemicals and production date, manufacturer name and address. Each batch of product boxes shipped out of the factory shall be accompanied by a quality inspection certificate, standard number, registered trademark, net weight, production batch number, photographic chemicals and production date, manufacturer name.
6.3 Transportation
During transportation, the product should be loaded and unloaded with care, and protected from heat, rain and moisture. 4
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HG/T2335-92
Protect from heat, rain and direct exposure
The product should be stored in a ventilated and dry place. Avoid light. Additional instructions:
This standard is proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China: This standard is under the jurisdiction of the Photosensitive Material Technology Development Center of the Ministry of Chemical Industry, and this standard is drafted by the Guangzhou Photographic Chemical Material Factory. The Photosensitive Material Technology Development Center of the Ministry of Chemical Industry and the Nantong Synthetic Material Experimental Factory of the Ministry of Chemical Industry participated in the drafting.
The main drafters of this standard are Huang Weiqi, Ding Shuyuan, Guo Yangcui and Wu Zhigang. Standard exchange network mm.i2s8o.omFree download of various standard industry materials
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