3,3'-Dichlorobenzidine , Analysis standard , 91-94-1
CAS NO.：91-94-1
Empirical Formula: C12H10Cl2N2
Molecular Weight: 253.13
MDL number: MFCD00043917
EINECS: 202-109-0
PRODUCT Properties
| Melting point: | 132.5°C |
| Boiling point: | 398.89°C (rough estimate) |
| Density | 1.3171 (rough estimate) |
| vapor pressure | 4.2 x 10-7 at 25 °C (estimated, Howard, 1989) |
| refractive index | 1.6400 (estimate) |
| Flash point: | 10 °C |
| storage temp. | 2-8°C |
| solubility | Soluble in ethanol, benzene, and glacial acetic acid (Windholz et al., 1983) |
| pka | 2.70±0.10(Predicted) |
| Water Solubility | 3.114mg/L(25 ºC) |
| Henry's Law Constant | 4.5 x 10-8 atm?m3/mol at 25 °C (estimated, Howard, 1989) |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
| InChIKey | HUWXDEQWWKGHRV-UHFFFAOYSA-N |
| CAS DataBase Reference | 91-94-1(CAS DataBase Reference) |
| IARC | 2B (Vol. 29, Sup 7) 1987 |
| NIST Chemistry Reference | [1,1'-Biphenyl]-4,4'-diamine, 3,3'-dichloro-(91-94-1) |
| EPA Substance Registry System | 3,3'-Dichlorobenzidine (91-94-1) |
Description and Uses
3,30-Dichlorobenzidine is a gray or purplecrystalline solid. Molecular weight =253.14; Boilingpoint =368℃; Freezing/Melting point = 132.8℃;Autoignition temperature =350℃. Hazard Identification(based on NFPA-704 M Rating System): Health 0,Flammability 1, Reactivity 0. Practically insoluble in water;solubility = 0.07% at 15℃.
Intermediate in the manufacture of azo dyes and pigments for printing inks, textiles, paints, plastics, and crayons; curing agent for isocyanate-terminated polymers and resins; rubber compounding ingredient; analytical determination of gold; formerly used as chemical intermediate for direct red 61 dye.
Safety
| Symbol(GHS) |    GHS07,GHS08,GHS09 |
| Signal word | Danger |
| Hazard statements | H312-H317-H350-H410 |
| Precautionary statements | P201-P202-P273-P280-P302+P352+P312-P308+P313 |
| Hazard Codes | T,N,F |
| Risk Statements | 45-21-43-50/53-52/53-39/23/24/25-23/24/25-11-51/53 |
| Safety Statements | 53-45-60-61-36/37-16-7 |
| RIDADR | UN 3077 9/PG 3 |
| WGK Germany | 3 |
| RTECS | DD0550000 |
| HazardClass | IRRITANT |
| HS Code | 29215900 |
| Hazardous Substances Data | 91-94-1(Hazardous Substances Data) |
| Toxicity | Acute oral LD50 for rats as free base or dihydrochloride are 7,070 and 3,820, respectively (Gerade and Gerade, 1974). |
