o-toluidine
Description
o-Toluidine (CAS 95-53-4), also known as o-tolylamine, is an aromatic amine used as a chemical intermediate in the synthesis of dyes, pigments, and curing agents.
It serves as a building block in manufacturing processes where a reactive amine group is required to produce more complex organic compounds for industrial use.
In the dye and pigment industry, this chemical is a key precursor in the production of azo dyes used to color textiles, leather, and paper substrates.
Printing ink formulations rely on pigments derived from these intermediates to achieve specific hue ranges in packaging applications and commercial printing processes.
It functions as a curing agent component and cross-linker in certain resin systems, contributing to the hardening of coatings and high-performance adhesives.
Personal care product manufacturers use derived colorants in formulations where specific synthetic dye chemistry is required for consumer goods and cosmetics.
The product is supplied as a liquid at ambient conditions, typically available in drum and IBC quantities for industrial buyers and large-scale manufacturing.
It is offered primarily in technical grade, with purity specifications commonly ranging from 99% and above to ensure consistent performance in chemical synthesis.
Physical Properties
| Melting Point | -16.3 °C |
| Boiling Point | 200.3 °C |
| Density | 1.008 g/cm³ @ Temp: 20 °C |
| Flash Point | 185 °F |
| Appearance | Light-yellow liquid, becomes reddishbrown on exposure to air and light. Soluble in alcohol and ether; very slightly soluble in water. Combustible. |
| Color | light yellow to light amber |
| Odor | Aromatic, aniline-like. |
| Form | liquid |
| Water Solubility | 1.5 g/100 mL (25 ºC) |
| Vapor Pressure | 0.26 mm Hg ( 25 °C) |
| Refractive Index | n 20/D 1.572(lit.) |
| pH | 7.4 (H2O, 20℃)Aqueous solution |
| Log P | 1.4 at 24.5℃ |
Safety & Handling (Learn More)
Trade & Regulatory
| HS Code | 29214300 |
| UN Number | 2920 |
| ADR Class | 8 |
| Packing Group | I |
| Storage Class | 6.1A - Combustible acute toxic Cat. 1 and 2 very toxic hazardous materials |
| WGK (Germany) | 3 |
Documentation
Other Names
ortho-toluidine|o-tolylamine|o-Methylbenzenamine|o-methylaniline|o-aminotoluene|2-Toluidine|2-Methylbenzenamine|2-Methylbenzamine
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