Butyric Acid
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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)
C4H8O2
88.11 CAS RN: 107-92-6.-Clear, colorless to faint yellow liquid. Miscible with water and with methanol.
Assay: Weigh accurately about 500 mg, transfer to a suitable container, add 30 mL of water, and mix. Add 40 mL of water, and mix. Add phenolphthalein TS, and titrate with 0.1 N sodium hydroxide VS. Each mL of 0.1 N sodium hydroxide is equivalent to 8.81 mg of C4H8O2: not less than 99.0% of C4H8O2 is found.
REFRACTIVE INDEX (831): about 1.398 at 20°.
