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Physical & Chemical properties

Boiling point

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Description of key information

Assumed to decompose completely without boiling

Key value for chemical safety assessment

Additional information

Testing for this endpoint has been waived in accordance with column 2 restrictions.

Dry salts

For dry salts this endpoint has been waived as these materials melt above 300 °C and/or decompose before boiling.

Aqueous solutions

The boiling point of watery iron salt solutions can be approximated based on the molarity by:

delta T(boiling) = bs·Ke,

where delta T(boiling) is the boiling point elevation [K], Ke is the ebullioscopic constant for water (= 0.521 K·kg/mol) and bs is the combined molarity of the salts [mol/kg].

The likely boiling point ranges from ca. 104 to 120 °C at 101325 Pa.

Table: Boiling points of the registered category member salt forms under standard pressure (ISO 5011, i.e. 101.3 kPa)

Category member, Molecular Formula  Anhydrous form Solid hydrate form Aqueous solution
Ferric sulphate, Fe2(SO4)3 104-107 °C