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Physical & Chemical properties

Dissociation constant

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Description of key information

Study scientifically unjustified: In accordance with section 1 of REACH Annex XI, the dissociation constant study does not need to be performed as the substance is a salt. Salts are reaction products of acids and bases that retain their ionic character.

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Additional information

Dissociation constants of the organic tartrate group are provided, based on those published for tartaric acid. These are considered to be relevant to the sodium and potassium salt which ionise in solution. pKa1 = 2.98; pKa2 = 4.34.at 25 °C.