p-Toluidine
p-Toluidine (CAS: 106-49-0) is an aromatic amine with a methyl group para to the amino group, supplied as white to light brown crystalline flakes. It is an essential dye and pigment intermediate.
It is soluble in ethanol and ether and slightly soluble in water, and it must be stored away from light and air to limit discolouration.
Major uses include azo and triarylmethane dyes, pigments, rubber chemicals, pharmaceuticals and agrochemicals, where consistent amine content determines yield.
It is toxic and discolours on exposure to air, so it should be stored tightly closed in a cool, dry place. Typical quality checks include assay, melting point, moisture and low o-toluidine content.
• Dye and pigment manufacturing: diazo and coupling component for azo dyes and pigments. Para-orientation gives good yields and clean shades in azo coupling.
• Pharmaceutical and agrochemical synthesis: starting material for toluene-based drug and pesticide intermediates. These routes feed into established production chains in several regions.
• Polymer and rubber chemistry: intermediate for antioxidants, curing agents and optical brighteners. Its low cost and high reactivity make it a staple intermediate.
• Sulfonamide and specialty synthesis: used for p-toluenesulfonamide derivatives, urea herbicides and as a laboratory reagent.
Product Name: p-Toluidine
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