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Physical & Chemical properties

Melting point / freezing point

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Description of key information

FeClSO4: Anhydrous form not stable; Aqueous solution (40 %) ca. -50 °C

Key value for chemical safety assessment

Additional information

“Sublimation”

It should be noted that all the soluble iron salt category members decompose at elevated temperatures to give toxic gases. This is sometimes noticed as “sublimation”.

Ferric chloride sulphate, FeClSO4

This endpoint has been waived as measurement of the dry salt is technically not feasible. The compound is marketed as aqueous solution for which the melting point is known to be approximately -50 °C.

Table: Melting point under standard pressure (ISO 5011, i.e. 101.3 kPa)

Category member, Molecular Formula  Anhydrous form Solid hydrate form Aqueous solution
Ferric chloride sulphate, FeClSO4 -50 °C