3,3′-diaminobenzidine

3,3'-diaminobenzidine structural formula

Structural formula

Business number 0246
Molecular formula C12H14N4
Molecular weight 214.27
label

3,3′,4,4′-Diphenyltetramine,

3,3′,4,4′-tetraaminobiphenyl,

3,3′,4,4′-Biphenyltetramine,

3,3′,4,4′-Tetraaminobiphenyl,

DAB,

(NH2)2C6H3C6H3(NH2)2

Numbering system

CAS number:91-95-2

MDL number:MFCD00007725

EINECS number:202-110-6

RTECS number:DV8750000

BRN number:1212988

PubChem number:24894175

Physical property data

1. Properties: Gray to yellow-brown flaky crystals or crystalline powder. The color gradually darkens in the air.

2. Density (g/mL, 25/4℃): Undetermined

3. Relative vapor density (g/mL, air=1): Undetermined

4. Melting point (ºC): 176-180

5. Boiling point (ºC, normal pressure): Undetermined

6. Boiling point (ºC, 5.2kPa): Undetermined

7. Refractive index: Undetermined

8. Flash point (ºC): Undetermined

9. Specific rotation (º): Undetermined Determined

10. Autoignition point or ignition temperature (ºC): Not determined

11. Vapor pressure (kPa, 25ºC): Not determined

12. Saturated vapor pressure (kPa, 60ºC): Undetermined

13. Heat of combustion (KJ/mol): Undetermined

14. Critical temperature (ºC): Undetermined

15. Critical pressure (KPa): Undetermined

16. Log value of oil-water (octanol/water) partition coefficient: Undetermined

17. Explosion upper limit ( %, V/V): Undetermined

18. Lower explosion limit (%, V/V): Undetermined

19. Solubility: Soluble in hot water and hot ethanol.

Toxicological data

None yet

Ecological data

None yet

Molecular structure data

1. Molar refractive index: 67.78

2. Molar volume (cm3/mol): 163.8

3. Isotonic specific volume (90.2K ): 483.9

4. Surface tension (dyne/cm): 76.1

5. Polarizability (10-24cm3): 26.87

Compute chemical data

1. Reference value for hydrophobic parameter calculation (XlogP): None

2. Number of hydrogen bond donors: 4

3. Number of hydrogen bond acceptors: 4

4. Number of rotatable chemical bonds: 1

5. Number of tautomers: none

6. Extension�Molecular polar surface area 104

7. Number of heavy atoms: 16

8. Surface charge: 0

9. Complexity: 209

10. Number of isotope atoms: 0

11. Number of determined atomic stereocenters: 0

12. Number of uncertain atomic stereocenters: 0

13. Determine the number of stereocenters of chemical bonds: 0

14. Uncertain number of stereocenters of chemical bonds: 0

15. Number of covalent bond units: 1

Properties and stability

None yet

Storage method

This product should be stored in a sealed, cool place and away from light.

Synthesis method

(1) 3,3`-Dichlorobenzidine is used as raw material and reacts with ammonia under the action of copper catalyst; (2) Benzidine is used as raw material and reacts with acetic acid to generate biphenyl diethylamide, which is then reacted with nitric acid The reaction generates 3,3`-dinitrobiphenyl diethylamide, which is hydrolyzed in a sulfuric acid aqueous solution to generate 3,3`-dinitrobenzidine, which is finally reduced with sodium sulfide or reduced by catalytic hydrogenation.

Purpose

React and polymerize with aromatic dicarboxylic acid to generate polycyclic polymer polybenzimidazole; react with aromatic dicarboxylic anhydride to generate ladder polymer polybenzimidazole pyrrolidone, etc.

This article is from the Internet, does not represent the position of Toluene diisocyanate reproduced please specify the source.https://www.chemicalchem.com/archives/29053

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