Ammonium citrate dibasic

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White, water-soluble granules that smell slightly of ammonia. Ammonium citrate is used as a mordant for printing cotton fabric. It is also used as a corrosion inhibitor and as a mild cleaning agent for the removal of sulfate crust from stone. Ammonium citrate has also been used for cleaning metals such as iron and aluminum as well as copper alloys.

Synonyms and Related Terms

diammonium citrate; citric acid diammonium salt; diammonium hydrogen citrate; 1,2,3-propanetricarboxylic acid,2-hydroxy-,diammonium salt

Other Properties

Soluble in water. Slightly soluble in ethanol.

pH of 0.1 M aqueous solution = 4.3

Composition (HN4)2HC6H5O7
CAS 3012-65-5
Density 1.48
Molecular Weight mol. wt. = 226.19

Hazards and Safety

Inhalation, ingestion, and contact causes irritation, coughing, nausea and redness.

Mallinckrodt Baker: MSDS

Additional Information

° A.Timar-Balazsy, D.Eastop, Chemical principles of textile conservation, Butterworth Heinemann, 1998.

° H.Brinch-Madsen, "Die reinigung von eisen mit ammoniakalischer Citronensaure", Arbeitsblatter fur Restauratoren 2/1974

° D.C.Horner, "The Application of Ammoniated Citric Acid to Metal Cleaning", Australasian Corrosion Enginering, Sept.1968, 3-9

Sources Checked for Data in Record

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 540
  • External source or communication Comment: Submitted information from Budiga Goran
  • Marie Svoboda, Conservation Survey Index, unpublished, 1997
  • Teri Hensick, contributed information, 1998

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