C.I. 13011 (Free acid)
4'-aminoazobenzene-4-sulfonic acid
CAS: 104-23-4
Molecular Formula: C12H11N3O3S
C.I. 13011 (Free acid) - Names and Identifiers
| Name | 4'-aminoazobenzene-4-sulfonic acid |
| Synonyms | PAABSA C.I. Food Yellow 6 C.I. 13011 (Free acid) 4-Aminoazobenzene-4-sulfonic acid P-AMINOAZOBENZENE-4'-SULFONIC ACID 4'-aminoazobenzene-4-sulfonic acid 4-Aminoazobenzene-4'-sulfonic acid 4'-Aminoazobenzene-4-sulphonic acid Para amino azo benzene 4 sulphonic acid 4-(4-Aminophenylazo)benzenesulfonic acid 4-((4-aminophenyl)azo)-benzenesulfonicaci 4-[(4'-SULFOPHENYL)AZO]ANILINE SODIUM SALT PARA AMINOAZOBENZENE-4-SULFONIC ACID (PAAB4SA) 4-((4-aminophenyl)diazenyl)benzenesulfonic acid (4-ANILINOAZO)BENZENE-4-SULFONIC ACID SODIUM SALT 4-[(E)-(4-aminophenyl)diazenyl]benzenesulfonic acid sodium 4-[(E)-(4-aminophenyl)diazenyl]benzenesulfonate potassium 4-[(E)-(4-aminophenyl)diazenyl]benzenesulfonate 4-(4-Amino-phenylazo)-benzenesulfonic acid anion SODIUM SALT |
| CAS | 104-23-4 |
| EINECS | 203-187-9 |
| InChI | InChI=1/C12H11N3O3S/c13-9-1-3-10(4-2-9)14-15-11-5-7-12(8-6-11)19(16,17)18/h1-8H,13H2,(H,16,17,18) |
C.I. 13011 (Free acid) - Physico-chemical Properties
| Molecular Formula | C12H11N3O3S |
| Molar Mass | 277.3 |
| Density | 1.3764 (rough estimate) |
| Boling Point | 477.42℃[at 101 325 Pa] |
| Water Solubility | 513-1320mg/L at 37℃ |
| Solubility | 345.945mg/L in organic solvents at 20 ℃ |
| Vapor Presure | 0-0Pa at 25℃ |
| pKa | -1.10±0.50(Predicted) |
| Refractive Index | 1.6630 (estimate) |
| Use | Used as a dye intermediate |
C.I. 13011 (Free acid) - Reference Information
| LogP | -0.352 at 37℃ |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Application | p-aminoazophenyl-4-sulfonic acid is a carboxylic acid derivative that can be used as a dye intermediate. |
| Use | use as dye intermediate |
| category | toxic substances |
| flammability hazard characteristics | flammability; Toxic nitrogen oxide and sulfur oxide fumes from combustion |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| extinguishing agent | dry powder, foam, sand, carbon dioxide, water mist |
Last Update：2024-04-09 20:49:11
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