ο-Tolidine , AR,98% , 119-93-7
Synonym(s):
3,3′-Dimethylbenzidine;4,4′-Bianisidine;Ellms-Hauser solution
CAS NO.：119-93-7
Empirical Formula: C14H16N2
Molecular Weight: 212.29
MDL number: MFCD00014773
EINECS: 204-358-0
PRODUCT Properties
| Melting point: | 128-131 °C(lit.) |
| Boiling point: | 300.5 °C |
| Density | 0.9678 (rough estimate) |
| refractive index | n |
| Flash point: | 244 °C |
| storage temp. | -20°C |
| solubility | 2% HCl: 10 mg/mL, clear |
| form | powder (may contain lumps) |
| pka | 4.59±0.10(Predicted) |
| Colour Index | 37230 |
| color | light brown |
| Water Solubility | Slightly soluble in water. |
| Merck | 14,9514 |
| BRN | 2210640 |
| Exposure limits | TLV-TWA none; carcinogenicity: A2 — Suspected Human Carcinogen (ACGIH), Animal
Limited Evidence (IARC). |
| InChIKey | NUIURNJTPRWVAP-UHFFFAOYSA-N |
| IARC | 2B (Vol. 1, Sup 7) 1987 |
| NIST Chemistry Reference | [1,1'-Biphenyl]-4,4'-diamine, 3,3'-dimethyl-(119-93-7) |
| EPA Substance Registry System | 3,3'-Dimethylbenzidine (119-93-7) |
Description and Uses
o-Tolidine, also called orthotolidine or 2-tolidine, is a chemical compound with the molecular formula (C6H4(CH3)NH2)2. It is a white to reddish-colored, combustible, aromatic amine that emits toxic fumes of nitrogen oxides when heated to decomposition. Several isomers are known; the 3-tolidine derivative is also important commercially. It is a colorless compound although commercial samples are often colored. It is slightly soluble in water. It forms salts with acids, such as hydrochloride, which is commercially available. 2-Tolidine can be produced by a benzidine rearrangement from a hydrazine derivative derived from 2-nitrotoluene.
o-Tolidine is used extensively in the manufacture of dyes, especially in the production of soluble azo dyes and insoluble pigments for the textile, leather, and paper sectors. Additionally, It is also used as a sensitive colorimetric reagent for the analysis of gold and free chlorine in water.
Safety
| Symbol(GHS) |    GHS07,GHS08,GHS09 |
| Signal word | Danger |
| Hazard statements | H302-H350-H411 |
| Precautionary statements | P202-P264-P270-P273-P301+P312-P308+P313 |
| Hazard Codes | T,N,F |
| Risk Statements | 45-68-51/53-22-11 |
| Safety Statements | 53-45-61-16 |
| OEL | Ceiling: 0.02 mg/m3 [60-minute] [skin] |
| RIDADR | UN 3082 9/PG 3 |
| WGK Germany | 3 |
| RTECS | DD1225000 |
| F | 8 |
| TSCA | Yes |
| HazardClass | 6.1(b) |
| PackingGroup | III |
| HS Code | 29215900 |
| Hazardous Substances Data | 119-93-7(Hazardous Substances Data) |
| Toxicity | dog,LDLo,oral,600mg/kg (600mg/kg),Archiv fuer Experimentelle Pathologie und Pharmakologie. Vol. 58, Pg. 167, 1907. |
