Potassium borotartrate

Description

White, water-soluble powder used in photography as a retarder for alkaline developers.

Synonyms and Related Terms

potassium tartratoborate; soluble cream of tartar; borated cream of tartar; potassium sodium borotartrate

Other Properties

Soluble in water.

Composition	KC4H4BO7

Sources Checked for Data in Record

• Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985

• The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 7778