Bromophenol Blue Sodium
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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)
—The sodium salt of 3′,3′′,5′,5′′ (Tetrabromophenolsulfonphthalein), C19H9Br4O5SNa—646.36—Pinkish crystals. Soluble in water and in alcohol.
Transition interval: from pH 3.0 to 4.6. Color change: from yellow to blue.
