p-Toluidine
CAS 106-49-0
EC 203-403-1
Formula C7H9N
MW 107.15 g/mol
Pigments & Colorants Textile, Leather & PaperPrinting & PackagingPersonal Care & CosmeticsPlastics & PolymersCoatings, Adhesives, Sealants & Elastomers Cross-linking & Curing
Description
P-Toluidine (CAS 106-49-0, EC 203-403-1), also known as 4-toluidine or p-tolylamine, is an aromatic amine with the molecular formula C7H9N. It carries no assigned E-code and is classified under the Amines category for industrial chemical supply.
In textile and leather dyeing, p-toluidine acts as a diazo component, coupling with other intermediates to produce azo colorants that bond directly to fibre substrates. In coatings and polymer systems, it functions as a cross-linking agent, reacting with epoxy or isocyanate groups to build cured network structures with controlled mechanical properties. It is also used in hair dye formulations as a colour precursor.
P-Toluidine is supplied as a powder and is subject to REACH registration requirements within the European Economic Area. Procurement teams should confirm SDS documentation and substance identity against EC number 203-403-1. Buyers should consult current regulatory listings, as aromatic amines are subject to ongoing classification review under EU chemical legislation.
In textile and leather dyeing, p-toluidine acts as a diazo component, coupling with other intermediates to produce azo colorants that bond directly to fibre substrates. In coatings and polymer systems, it functions as a cross-linking agent, reacting with epoxy or isocyanate groups to build cured network structures with controlled mechanical properties. It is also used in hair dye formulations as a colour precursor.
P-Toluidine is supplied as a powder and is subject to REACH registration requirements within the European Economic Area. Procurement teams should confirm SDS documentation and substance identity against EC number 203-403-1. Buyers should consult current regulatory listings, as aromatic amines are subject to ongoing classification review under EU chemical legislation.
Physical Properties
| Melting Point | 44-45 °C |
| Boiling Point | 200.4 °C |
| Density | 1.046 g/cm³ @ Temp: 20 °C |
| Flash Point | 192 °F |
| Appearance | White lustrous plates or leaflets. Soluble in alcohol and ether; very slightly soluble in water. Combustible. |
| Color | tan to brown |
| Form | powder |
| Water Solubility | 1.1 g/100 mL |
| Vapor Pressure | 0.26 mm Hg ( 25 °C) |
| Refractive Index | 1.5636 |
| pH | 7.8 (7g/L) |
| Log P | 1.39-1.44 at pH7.4-7.5 |
Safety & Handling (Learn More)
Danger GHS06 GHS08 GHS09 GHS07
H
H301H302H311H315H317H319H331H335H351H370H372H400H410H411
P
P203P260P261P262P264P270P271P272P273P280P316P318P319P321P330P391P405P501P264+P265P301+P316P301+P317P302+P352P304+P340P308+P316P332+P317P333+P317P337+P317P361+P364P362+P364P403+P233P305+P351+P338
Trade & Regulatory
| HS Code | 38220000 |
| UN Number | 3451 |
| ADR Class | 6.1 |
| Packing Group | II |
| Storage Class | 6.1A - Combustible acute toxic Cat. 1 and 2 very toxic hazardous materials |
| WGK (Germany) | 2 |
Other Names
4-methylaniline4-toluidinep-tolylamine4-methylbenzenaminep-Aminotoluene
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