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

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
• Toxicity: Acute oral LD₅₀ for rats as free base or dihydrochloride are 7,070 and 3,820, respectively (Gerade and Gerade, 1974).