Some standard content:
Chemical Industry Standard of the People's Republic of China
HG/T2532—93
Photographic Chemicals
Dibutyl Phthalate
Published on September 6, 1993
Ministry of Chemical Industry of the People's Republic of China
Implementation on July 1, 1994
Chemical Industry Standard of the People's Republic of China
Photographic Chemicals
Dibutyl Phthalate
HG/T 2532—93
This product is a colorless or light yellow oily liquid, which can be miscible with general organic solvents such as alcohol, ether, magnesium and acetone. Molecular formula: CH204
Structural formula:
-oc,H.
OC,H，
Relative molecular mass: 278.35 (according to the 1989 international relative atomic mass) 1 Subject content and scope of application
This standard specifies the technical requirements, test methods, inspection rules and packaging, marking, transportation and storage requirements of the photographic chemical dibutyl phthalate.
This standard is applicable to the inspection of the photographic chemical dibutyl phthalate. 2 Reference standards
GB/T 601
GB/T 602
GB/T 603
GB/T 605
GB/T 611
GB/ T 614
GB/T 619
GB/T-6682
Chemical reagents
Preparation of standard solutions for titration analysis (volumetric analysis)Preparation of standard solutions for determination of impurities
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Preparation of preparations and products used in test methodsGeneral method for colorimetry
General method for density determination
General method for refractive index determination
Sampling and acceptance rules
Specifications and test methods for water used in analytical laboratories HG 3—119
9 Chemical reagent packaging and marking
3 Technical requirements
The accompanying chemical product dibutyl phthalate shall comply with the requirements of the following table, approved by the Ministry of Chemical Industry of the People's Republic of China on September 6, 1993 and implemented on July 1, 1994
Content, %
Chroma, exposure unit
Density (20℃), g/mL
Acidity (dimethicone) Chemical
Volatile matter, %
Ignition residue (calculated as sulfate), %
Photographic properties
Test method
HG/ T 2532 —93
1, 044~t. 048
Service 90 Industry 4 Zone Department
The standard titration solutions, impurity standard solutions, preparations and products used in this test method shall be in accordance with GB/T 601, GB/T 602, GB/T 603, GB/T 604, unless otherwise specified. 603 stipulates that the water used for preparation and experiment should meet the third-grade water specification in GB/T6682. 41 Dibutyl phthalate (C120) content determination T
Weigh 1.5g sample, accurate to 0.0001g. Add 25.00mL of sodium hydroxide standard titration solution (c(NaOH)=1mol/L], add 50mL of ethanol [95%) and reflux on a water bath for 30min. Cool to room temperature, rinse the condenser tube wall with water without carbon dioxide, add .2 drops of acid indicator solution (10.g/L), and titrate with hydrochloric acid standard titration solution e (HCl standard: 5mol/L). The disappearance of the red color is the integral point, and a vacuum test is performed at the same time. The mass content of dibutyl phthalate is calculated according to formula (1): X,
wherein: x
1. 675:5-
0. 139 2-
4.2Appearance
(V - V,) · c × 0. 139 2
Mass percentage of dibutyl phthalateContains disk, volume of standard hydrochloric acid solution consumed by blank, LVolume of standard hydrochloric acid solution consumed by sample, mL; Actual concentration of standard hydrochloric acid solution, mol/L:Conversion factor for acidity conversion to ester content: Acidity (expressed as mass percentage of phthalic acid) × 100 - 1. 675 5 A
With 1.00mL standard hydrochloric acid solution【e(HC1)-1.000 mo1/L): the mass of dibutyl formate expressed in grams; Www.bzxZ.net
the mass of the sample, g-
observe visually, the sample should be transparent, oily liquid without visible impurities, 4.3 chromaticity
take 50mL sample, inject into 50mL dry colorimetric tube, and measure according to GB/T605, 4.4 density
measure according to GB/T 61I
4.5 acidity
4,5.1 preparation of neutral ethanol
HG/ T 2532 — 93
take 50mL ethanol (absolute ethanol), add two drops of phenol anhydride indicator solution (10g/L), use sodium hydroxide standard titration solution [c(NaOH)=0.1mo1/L) titration chamber bath liquid turns pink, keep for 30s. 4. 5.2 Determination method
Weigh 10 g of sample, accurate to 0-01 g, add 50 L of neutral ethanol and two drops of weak acid indicator solution (10 g/L): titrate with sodium hydroxide standard titration solution (c(NaOH)=0.1 mol/L) until the solution turns pink, and keep it for 30 s. x.
V-tx0.08307
Wherein: X—acidity (calculated as phthalic acid), %: × 100
-volume of standard sodium hydroxide titration solution consumed by the sample, mL; -concentration of standard sodium hydroxide titration solution, mol/L; 0.083 07
The mass of phthalic acid equivalent to 1.00mL standard sodium hydroxide titration solution (e(NaOH)=1.000mo1/L), expressed in grams:
-mass of sample, E
4.6 Volatile substances
Weigh 10g of sample in a constant-pressure weighing bottle (weighing bottle diameter 40mm: height 25mm), accurate to 0.0001g, and bake in an electric oven at 125±2℃ for 3h, then move into a desiccator and cool to desired temperature. , the mass percentage of the weighed selective substances is calculated according to formula [3): x,
wherein: m--the mass of the sample and the weighing bottle before heating, m2--the mass of the sample and the weighing bottle after heating, gm--the mass of the weighing bottle, E.
4. 7. Ignition residue
Weigh 35g of sample, accurate to 0.01, place in a straightened porcelain bath, evaporate on a sand bath, cool and add 0.5M sulfuric acid to dryness, ignite in a high-temperature furnace at 800 ℃ to constant weight, the mass percentage of the ignition residue is calculated according to formula (4): x
wherein: m3
--the mass of the residue and empty porcelain, g;
--the mass of the empty porcelain, g;
--the mass of the sample, 2
Photographic performance
Determined by negotiation between the supplier and the supplier
5 Inspection regulations Then
Sampling and acceptance shall be carried out according to the provisions of GB/T619, and the calculation results and indicators shall be compared by the digital rounding method. 6 Packaging, marking, transportation and storage
6.1 Packaging and marking
According to the provisions of H3-119, among which:
Inner packaging form: Xz--5
Outer packaging form: W-1
Packing unit: Class 4 and 5
6.2 Transportation
Handle carefully during transportation to prevent the container from breaking.
Store in a cool and dry warehouse.
Additional instructions:
HG/T 253293
This standard is proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China, and this standard is under the jurisdiction of the Photosensitive Material Technology Development Center of the Ministry of Chemical Industry., this standard was drafted by Beijing Chemical Plant. Drafted by Photosensitive Technology Development Center and Shanghai Film Factory: The main drafters of this standard are Guan Ruibao, Qiang Jinglin, Hu Suqin and Chen Xiangfang, People's Republic of China
Beigong Industry Standard
Photographic Chemicals
Dibutyl Phthalate
HG/T 2532-93
Editor: Chemical Industry Standards Editing Department
(Standardization Research Institute of Ministry of Chemical Industry)
Postal Code: 100013
Printer: Standardization Research Institute of Ministry of Chemical Industry
Copyright reserved. No reproduction allowed
Format: 880×12301/16 Number of printed sheets: 8000 First edition in June 1994
First printing in June 1994
Number of copies: 1-500
Cost: RMB 2.10
HG/T 2532 -- 93
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