1-Naphthylamine Hydrochloride
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This article is compiled based on the United States Pharmacopeia (USP) – 2025 Edition
Issued and maintained by the United States Pharmacopeial Convention (USP)
C10H7NH2 · HCl
179.65 CAS RN: 552-46-5.-White, crystalline powder that turns bluish upon exposure to light and air. Soluble in water, in alcohol, and in ether.
A 1 in 100 solution, make slightly acid with acetic acid, gives a violet color with 5 drops of ferric chloride TS. A 1 in 40 solution in diluted acetic acid is colorless and not more than slightly opalescent.
Residue on Ignition (Reagent test): Ignite 200 mg with a few drops of sulfuric acid: the weight of the residue is negligible.
