3,3'-Dihydroxybenzidine , 98% , 2373-98-0

CAS NO.：2373-98-0

Empirical Formula: C12H12N2O2

Molecular Weight: 216.24

MDL number: MFCD00039149

EINECS: 679-800-2

PRODUCT Properties

• Melting point: 292 °C
• Boiling point: 356.65°C (rough estimate)
• Density: 1.1710 (rough estimate)
• refractive index: 1.6660 (estimate)
• storage temp.: Keep in dark place,Inert atmosphere,Room temperature
• Water Solubility: Practically insoluble in water
• form: powder to crystal
• pka: 9.15±0.10(Predicted)
• color: White to Gray to Brown
• CAS DataBase Reference: 2373-98-0(CAS DataBase Reference)
• EPA Substance Registry System: 3,3-Dihydroxybenzidine (2373-98-0)

Description and Uses

3,3'-Dihydroxybenzidine is an organic synthesis intermediate used as a raw material for the synthesis of fire-resistant polymers (polyhydroxyamino acids).3,3'-Dihydroxybenzidine is also used in the preparation of hydroxyl-containing polyimides, all of which are synthesised to be soluble in NMP when heated. 3,3'-Dihydroxybenzidine is used in the synthesis of polyimides with hydroxyl groups. The glass transition temperature (Tg) of polyimides ranges from 336-360°C, independent of the structure of the tetracarboxylic dianhydride. The storage modulus of some polyimides does not decrease at elevated temperatures. All polyimides thermally transform into polybenzoxazole when heated to 500°C for 1 hour under vacuum.

4,4'-diaminobiphenyl-3,3'-diol is used as organic intermediates.

Safety

• Symbol(GHS): GHS07,GHS08
• Signal word: Warning
• Hazard statements: H315-H319-H351-H373
• Precautionary statements: P201-P202-P260-P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313-P308+P313-P405-P501
• Hazard Codes: T
• Risk Statements: 40-45-48-36/37/38
• Safety Statements: 22-53-45-36/37/39-26-6
• RTECS: DV4900000
• HS Code: 29222990
• Hazardous Substances Data: 2373-98-0(Hazardous Substances Data)