N,N-Dimethyl-p-phenylenediamine Dihydrochloride
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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)
(CH3)2NC6H4NH2·2HCL 209.12 CAS RN®: 99-89-9.-Nearly white, fine, crystalline, hygroscopic solid that may have a pinkish cast. Freely soluble in water; soluble in alcohol.
Assay: Transfer about 400 mg, accurately weighed, to a 250-mL beaker, and dissolve in about 75 mL of water. Titrate with 0.1 N sodium hydroxide VS, determining the endpoint potentiometrically. Each mL of 0.1 N sodium hydroxide is equivalent to 10.46 mg of C8H12N2·2HCl. Not less than 98% is found.
Solubility: A solution of 1 g in 10 mL of water produces not more than a slight haze.
