Registration Dossier

Physical & Chemical properties

Melting point / freezing point

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Tartaric acid and its salts are solid at 1013 hPa.

The determination of this property was done according to a weight of evidence approach based on available literature references.

The melting point for tartaric acid and its salts ranges, according to literature and experimental data, between 70 and 230 °C.

Key value for chemical safety assessment

Additional information

A collection of the melting point values was performed for tartaric acid and its salts. All found values are listed below.

EC name

Range of melting point (°C)

Interpretation of data

(+)-tartaric acid

168 - 171

solid

(-)-tartaric acid 

168 - 172

solid

(±)-tartaric acid

170 - 206

solid

 mesotartaric acid

140 - 147

solid

 potassium hydrogen tartrate

230

solid

 potassium sodium tartrate

70 - 100

solid

 calcium tartrate

decomposes at 165.2 +/- 0.3 C°

solid

 sodium hydrogen tartrate

-

solid

 disodium tartrate

-

solid

 dipotassium tartrate

-

solid

Based on melting point values, tartaric acid and its salts are solid at room temperature.