Sodium acid pyrophosphate

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White, crystalline powder. Sodium acid pyrophosphate, SAPP, is used as a mold inhibitor in paper (Roberts and Etherington 1982). It is also used as a buffer, and sequestrant. SAPP is used as an ingredient in baking powders and metal cleaners.

Synonyms and Related Terms

SAPP; disodium dihydrogen pyrophosphate; disodium pyrophosphate

Other Properties

Soluble in water.

Composition Na2H2P2O7 - 6H2O
Melting Point 220 (dec)
Density 1.862

Additional Information

M.Roberts, D.Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington, DC, 1982.

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