Potassium sodium tartrate
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Description
Colorless crystals that is also called Rochelle salts. Potassium sodium tartrate is used in baking powders and in the manufacture of silver mirrors. The complex organic salt has also been used to remove corrosion from bronzes (Lucas 1932).
Synonyms and Related Terms
Rochelle salt; alkaline Rochelle salt; sodium potassium tartrate; Seignette salt; 2,3-dihydroxy-[R-(R*,R*)]-butanedioic acid, monopotassium monosodium salt
Other Properties
Soluble in water. Insoluble in ethanol.
| Composition | KNaC4H4O6 - 4H2O |
|---|---|
| CAS | 304-59-6 |
| Melting Point | 70-80 |
| Density | 1.77 |
| Molecular Weight | mol. wt. = 210.16 |
Hazards and Safety
Mallinckrodt Baker: MSDS
Sources Checked for Data in Record
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 68
- 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
- Website address 1 Comment: termlist for conservation - www.hants.org.uk/museums