2,6-Dichloroquinone-chlorimide
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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)
(2,6-Dichloro-N-chloro-p-benzoquinone Imine), O:C H Cl :NCl 210.44—Pale yellow, crystalline powder. Insoluble in water; soluble in
alcohol and in dilute alkali hydroxide solutions.
Solubility in Alcohol: A solution of 100 mg in 10 mL of alcohol is complete and clear.
Residue on Ignition: Ignite 500 mg with 0.5 mL of sulfuric acid; the residue weighs not more than 1 mg (0.2%).
Sensitiveness: To 10 mL of a water solution containing 0.01 mg of phenol, add 0.3 mL of a sodium borate buffer (made by dissolving 2.84 g of
sodium borate in 90 mL of warm water, adding 8.2 mL of 1 N sodium hydroxide, and diluting with water to 100 mL) and 0.1 mL of a solution of
10 mg of the test specimen in 20 mL of alcohol; a distinct blue color develops within 10 min.
[Note—A suitable grade is available as catalog number D2746 from www.spectrumchemical.com.]
