Hydroxy Naphthol Blue
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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)
(1-(2-Naphtholazo-3,6-disulfonic Acid)-2-naphthol-4-sulfonic Acid, Disodium Salt), C20H12N2O11S3Na2 598.50 CAS RN: 165660-27-5.—Deposited on crystals of sodium chloride in the concentration of about 1%. Use ACS reagent grade.
