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Description of key information

Reliable handbook data and the results of a proprietary study are available.

Key value for chemical safety assessment

Additional information

The results of a proprietary study indicate that phosphorus pentasuphide dust may explode in the presence of a source of ignition.

Ullmann also notes that there is a danger of dust explosions, particularly when grinding or on filling or discharging the substance. Dust-air mixtures containing >3% oxygen and >50 g/m3P4S10(particle size <0.07 mm) are explosive. An additonal study confirms the limiting oxygen concentration for flame propagation to be 5% (Italmatch).

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