3,3'-Dichlorobenzidine
3,3-Dichlorobenzidine
CAS: 91-94-1
Molecular Formula: C14H10Cl2N2
3,3'-Dichlorobenzidine - Names and Identifiers
| Name | 3,3-Dichlorobenzidine |
| Synonyms | DCB C.I. 23060 3,3-Dichlorobenzidine 3,3'-Dichlorobenzidine o,o'-dichlorobenzidine 3,3'-dichloro-4,4'-diaminobiphenyl 4,4'-diamino-3,3'-dichlorobiphenyl 3,3'-dichloro-4,4'-biphenyldiamine 3,3'-dichlorobiphenyl-4,4'-diamine 3,3'-Dichloro-(1,1'-biphenyl)-4,4'-diamine |
| CAS | 91-94-1 |
| EINECS | 202-109-0 |
| InChI | InChI=1/C12H10Cl2N2/c13-9-5-7(1-3-11(9)15)8-2-4-12(16)10(14)6-8/h1-6H,15-16H2 |
3,3'-Dichlorobenzidine - Physico-chemical Properties
| Molecular Formula | C14H10Cl2N2 |
| Molar Mass | 277.15 |
| Density | 1.381g/cm3 |
| Melting Point | 133 |
| Boling Point | 385°C at 760 mmHg |
| Flash Point | 186.6°C |
| Water Solubility | Slightly soluble. 0.00123 g/100 mL |
| Vapor Presure | 3.93E-06mmHg at 25°C |
| Appearance | neat |
| pKa | 2.70±0.10(Predicted) |
| Storage Condition | 2-8°C |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| Refractive Index | 1.678 |
| Physical and Chemical Properties | Melting Point: 133 ℃ Boiling Point: 368 ℃ water solubility: 0.00123g/100 mL Appearance: Gray to purple solid crystals |
3,3'-Dichlorobenzidine - Risk and Safety
| Risk Codes | R45 - May cause cancer R21 - Harmful in contact with skin R43 - May cause sensitization by skin contact R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R39/23/24/25 - R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R11 - Highly Flammable R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S53 - Avoid exposure - obtain special instructions before use. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S36/37 - Wear suitable protective clothing and gloves. S16 - Keep away from sources of ignition. S7 - Keep container tightly closed. |
| UN IDs | UN 3077 9/PG 3 |
| WGK Germany | 3 |
| RTECS | DD0550000 |
| HS Code | 29215900 |
| Hazard Class | IRRITANT |
| Toxicity | Acute oral LD50 for rats as free base or dihydrochloride are 7,070 and 3,820, respectively (Gerade and Gerade, 1974). |
3,3'-Dichlorobenzidine - Upstream Downstream Industry
| Downstream Products | Pigment Yellow 13 Pigment Orange 13 tetrasodium 4,4'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[3-aminonaphthalene-2,7-disulphonate] |
3,3'-Dichlorobenzidine - Nature
| 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 conditions | 2-8°C |
| solubility | Soluble in ethanol, benzene, and glacial acetic acid (Windholz et al., 1983) |
| acidity coefficient (pKa) | 2.70±0.10(Predicted) |
| morphology | neat |
| water solubility | 3.114mg/L(25 °C) |
| 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 |
| (IARC) Carcinogen Classification | 2B (Vol. 29, Sup 7) 1987 |
| NIST chemical information | [1,1'-Biphenyl]-4,4'-diamine, 3,3'-dichloro-(91-94-1) |
| EPA chemical information | 3,3'-Dichlorobenzidine (91-94-1) |
Last Update：2024-04-09 18:58:34
3,3'-Dichlorobenzidine - Uses and synthesis methods
| chemical properties | gray to purple solid crystals |
| use | Used as an intermediate for dyes and pigments |
| production method |
The o-nitrochlorobenzene is reduced by coupling with zinc under alkaline conditions, and then the reduction product is rearranged under acidic conditions to obtain 3,3 '-dichlorobenzidine hydrochloride. |
| category | toxic substances |
| toxicity classification | Poisoning |
| acute toxicity | oral-rat LD50: 3820 mg/kg oral-mouse LD50: 2464 mg/kg |
| flammability hazard characteristics | Combustible; heated to release toxic hydrogen chloride, nitrogen oxide gas |
| storage and transportation characteristics | The warehouse is ventilated and dry at low temperature; it is stored and transported separately from the oxidant and food |
| fire extinguishing agent | dry powder, sand, foam, carbon dioxide |
Last Update：2024-04-09 21:01:54
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Downstream Products for 3,3'-Dichlorobenzidine
Pigment Yellow 13
Pigment Orange 13
tetrasodium 4,4'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[3-aminonaphthalene-2,7-disulphonate]
Pigment Orange 13
tetrasodium 4,4'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[3-aminonaphthalene-2,7-disulphonate]