O-toluidine is one of the aromatic amine compounds.

O-toluidine, also known as “o-aminotoluene”, is a colorless to light yellow liquid. It turns reddish brown when exposed to air and light, and forms a white precipitate when exposed to formaldehyde. Slightly soluble in water, soluble in dilute acid, alcohol and ether.

O-toluidine is an important intermediate in the production of dyes and pigments. It can be used to prepare direct red 62, red base RL, big red base G, maroon base GBC, basic fuchsin, norophenol AS-D, acid red 35, 158 , 265, solvent red 124, the diazo component and coupling component of azo dyes, used to produce organic Chemicalbook pigments yellow 14, 17, and blue 19; pesticide raw materials, used to produce the pesticide fungicide “tricyclazole” and the insecticide Boreworm , insecticide chloride; herbicide acetochlor; rubber vulcanization accelerator raw materials; saccharin raw materials; corrosion inhibitor raw materials, etc. In organic synthesis, o-toluidine is also used to synthesize heterocyclic compounds indole and its derivatives.

chemical properties

CAS No. 95-53-4

Molecular formula C7H9N

Molecular weight 107.15

EINECS No. 202-429-0

Melting point -23°C

Boiling point 199-200°C (lit.)

Density 1.008g/mL at 25°C (lit.)

Vapor density Chemicalbook3.7 (vsair)

Vapor pressure 0.26mmHg (25°C)

Refractive index n20/D1.572 (lit.)

Flash point 185°

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