C.I. 21090
Benzidine Yellow G
CAS: 6358-85-6;15541-56-7
Molecular Formula: C32H26Cl2N6O4
C.I. 21090 - Names and Identifiers
| Name | Benzidine Yellow G |
| Synonyms | C.I. 21090 Pigment Yellow 12 Benzidine Yellow G C.I. Pigment Yellow 12 Pigment Yellow 12 (21090) C.I. Pigment Yellow 12 (VAN) (8CI) 2,2'-[(3,3'-dichlorobiphenyl-4,4'-diyl)di(E)diazene-2,1-diyl]bis(3-oxo-N-phenylbutanamide) (2E,2E)-2,2'-[(3,3'-dichlorobiphenyl-4,4'-diyl)di(1E)hydrazin-2-yl-1-ylidene]bis(3-oxo-N-phenylbutanamide) 2-[2-chloro-4-[3-chloro-4-[2-oxo-1-(phenylcarbamoyl)propyl]azo-phenyl]phenyl]azo-3-oxo-N-phenyl-butanamide |
| CAS | 6358-85-6 15541-56-7 |
| EINECS | 228-787-8 |
| InChI | InChI=1/C32H26Cl2N6O4/c1-19(41)29(31(43)35-23-9-5-3-6-10-23)39-37-27-15-13-21(17-25(27)33)22-14-16-28(26(34)18-22)38-40-30(20(2)42)32(44)36-24-11-7-4-8-12-24/h3-18,29-30H,1-2H3,(H,35,43)(H,36,44) |
C.I. 21090 - Physico-chemical Properties
| Molecular Formula | C32H26Cl2N6O4 |
| Molar Mass | 629.5 |
| Density | 1.34g/cm3 |
| Melting Point | 312-320℃ |
| Boling Point | 805.4°C at 760 mmHg |
| Flash Point | 440.9°C |
| Water Solubility | <0.1 g/100 mL at 22℃ |
| Solubility | <0.1 G/100 ML AT 22°C |
| Vapor Presure | 5.64E-26mmHg at 25°C |
| pKa | 8.33±0.59(Predicted) |
| Storage Condition | Room Temprature |
| Refractive Index | 1.65 |
| Physical and Chemical Properties | Melting Point: 312-320°C water-soluble <0.1g/100 mL at 22°C solubility: insoluble in water, slightly soluble in ethanol; Red-orange in concentrated sulfuric acid, diluted Brown yellow precipitation; In concentrated nitric acid for Brown yellow. hue or shade: Yellow density/(g/cm3):1.4 Bulk density/(lb/gal):9.3-13.6 melting point/℃:317-322 average particle size/μm:0.10-0.21 particle shape: rod-like specific surface area/(m2/g):21;63 Ph/(10% slurry):5.0-8.5 oil absorption/(g/100g):25-80 hiding power: translucent/transparent diffraction curve: reflection curve: <1 mg src = http://images.chemnet.com/service/c_product/100013_4.jpg align = center> yellow powder, melting point 317 °c. It was heated at 150 °c for 20min to slightly turn green. Density 1.24~1.53g/cm3. In concentrated sulfuric acid, it is red light detection color, and after dilution, it is Brown light red; In concentrated nitric acid, it is Brown light yellow. Compared with C. I. Pigment Yellow 1, this product has strong anti-solvent and anti-migration properties, high coloring power, good heat resistance and transparency. |
| Use | Used for printing ink, paint, rubber, plastic, paint printing paste, cultural and educational supplies coloring There are 159 kinds of the varieties and formulations. Neutral yellow, in line with the color standard of four-color plate printing; High coloring strength and brightness and transparency (lucitia yellow 2JRT specific surface area of 44 m2/g); Medium solvent resistance, shows a tendency to recrystallize; Light and weather fastness is low, grade 3 and Grade 2 at 1/1, 1/3 standard depth, compared to other yellow pigments (P.Y.13,83,127,176) low grade 1-2. Widely used in printing ink, can be used for packaging printing ink, the United States with the water squeeze phase inversion color paste dosage form; Can also be used for pigment printing and plastic coloring, soft PVC has a certain mobility, good heat resistance makes it used for polyurethane foam coloring. |
C.I. 21090 - Upstream Downstream Industry
| Raw Materials | 3,3-Dichlorobenzidine Acetoacetanilide Acetic acid Sodium hydroxide Sulfonated castor oil Sodium nitrite Hydrochloric acid |
C.I. 21090 - Nature
| EPA chemical information | C. I. Pigment Yellow 12 (6358-85-6) |
Last Update：2024-04-10 22:29:15
C.I. 21090 - Production method
After diazotization of 3,3 '-dichlorobenzidine, it is coupled with acetanilide, and then the product is prepared by filtration, drying and other processing processes. 1. Diazotization 2. The coupling product requires the color light to be similar to the standard product, the tinting power is the standard product 100±5 (points), the moisture content is less than or equal to 2%, the oil absorption is 50±5%, the water-soluble salt content is less than or equal to 1.5%, the heat resistance is 180 ℃, the sun resistance is 5-6, the acid resistance and alkali resistance are all 1-2, the water permeability and oil permeability are, fineness (content of residue through 60 sieve) ≤ 5%. Raw material consumption (kg/t)3,3 '-dichlorobenzidine (100%) 410 acetanilide (100%) 590 hydrochloric acid (31%) 930 sodium nitrite (industrial) 235 soda ash (industrial) 495 glacial acetic acid 615 activated carbon 10 Taikao oil 55 Method 2: Starting from o-nitrochlorobenzene, it is reduced with zinc powder in caustic soda solution medium and condensed to 2,2'-dichlorodiphenylhydra. Then it is treated with hydrochloric acid. Translated to 3,3 'dichlorobenzidine hydrochloride. Then the 3,3 '-dichlorobenzidine is diazotized, and then coupled with o-acetyltoluidine to obtain the product. 1. Reductive condensation 2. Translocation, salting out 3. Diazotization, coupling
Last Update：2024-04-10 22:29:15
C.I. 21090 - Security information
| toxic substance data | 6358-85-6(Hazardous Substances Data) |
Last Update：2024-04-10 22:29:15
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View History
C.I. 21090
7-hydroxy-2-naphthyl 4-ethoxybenzoate
Acid Red 88 (15620)
ASISCHEM Y85510
罗通定
C.I.AcidBlue168
Bran lactate
7-hydroxy-2-naphthyl 4-ethoxybenzoate
Acid Red 88 (15620)
ASISCHEM Y85510
罗通定
C.I.AcidBlue168
Bran lactate
Raw Materials for C.I. 21090
3,3-Dichlorobenzidine
Acetoacetanilide
Acetic acid
Sulfonated castor oil
Sodium nitrite
Hydrochloric acid
Acetoacetanilide
Acetic acid
Sulfonated castor oil
Sodium nitrite
Hydrochloric acid