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Physical & Chemical properties

Melting point / freezing point

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Description of key information

Based on the data from handbooks for the two main constituents, calcium sulfate and calcium bis(dihydrogenorthophosphate), the single superphosphate decomposes above 100°C.

Key value for chemical safety assessment

Additional information

The two main constituents of single superphosphate:

Calcium sulfate anhydrous: melting at 1460 °C, Calcium sulfate dihydrate: decomposition at 150°C

Calcium phosphate, monobasic (CAS 7758-23-8): loss of water at 100°C, decomposition at 200°C (Merck 12th)