Phenoldisulfonic Acid TS
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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)
—Dissolve 2.5 g of phenol in 15 mL of sulfuric acid in a ask of suitable capacity. Add 7.5 mL of fuming sulfuric acid, stir well, and heat at 100° for 2 hours. Transfer the product, while still uid, to a glass-stoppered bottle, and, when desired for use, warm in a water bath until liqueed.
