O-Tolidine
Pharmaceutical Materials 2025-03-02
CAS Number: 106-49-0
Molecular Formula: C10H12N2
Molecular Weight: 160.22
Appearance: Red crystalline powder
Melting Point: 128-131°C
Solubility: Soluble in alcohol, ether, and glacial acetic acid
Usage: Used as an indicator and in the manufacture of azo dyes.
| Attribute | Details |
|---|---|
| Name | O-Tolidine |
| CAS Number | 119-93-7 |
| Synonyms | 4.4′-Diamino-3.3′-dimethylbiphenyl; Ortho-tolidine; 3.3′-Dimethylbenzidine; DMB; 2-Tolidine; o-Tolidina |
| Molecular Formula | C14H16N2 |
| Molecular Weight | 212.29 g/mol |
| Appearance | White to reddish crystalline powder or flakes |
| Density | Approximately 1.106 g/cm³ |
| Melting Point | 128-131°C |
| Boiling Point | 300.5°C |
| Flash Point | 244°C |
| Solubility | Slightly soluble in water, soluble in ethanol, ether, and dilute acids |
| Stability | Stable under normal temperatures and pressures |
| Primary Uses | Used as an intermediate in the production of dyes, such as Phenol AS-G and others. Also used as an analytical reagent, adsorption indicator, and redox indicator. |
| Safety Hazards | May be harmful if inhaled, ingested, or absorbed through skin. Causes eye and skin irritation. May cause respiratory irritation. Suspected human carcinogen (IARC Group 2B). Keep away from heat, sparks, and open flames. Store in a cool, dry, well-ventilated place. |
| Handling Precautions | Wear appropriate protective clothing, gloves, and eye/face protection when handling. Avoid contact with skin, eyes, and clothing. Wash thoroughly after handling. Use in a well-ventilated area. Store separately from incompatible materials. |
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