Cupric Tartrate TS, Alkaline (Fehling's Solution)
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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 Copper Solution (A): Dissolve 34.66 g of carefully selected, small crystals of cupric sulfate, showing no trace of effiorescence of adhering moisture, in water to make 500 mL. Store this solution in small, tight containers.
The Alkaline Tartrate Solution (B): Dissolve 173 g of crystallized potassium sodium tartrate and 50 g of sodium hydroxide in water to make 500 mL. Store this solution in small, alkali-resistant containers.
For use, mix exactly equal volumes of Solutions A and B at the time required.
