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Environmental fate & pathways

Hydrolysis

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Description of key information

This endpoint is waived in accordance with Column 2 of Annex VII of the REACH Regulation as the substance isis readily biodegradable.  Data waiving.

Key value for chemical safety assessment

Half-life for hydrolysis:
260 h
at the temperature of:
25 °C

Additional information

The hydrolysis of xanthate in aqueous solution at room temperature is characterized by the following reaction:

6ROC(S)SNa + 3H2O = 6ROH + 2NaSC(S)SNa + Na2CO3+ 3CS2

Further hydrolysis of the CS2gives H2S and CO2and the trithiocarbonate hydrolysis produces H2S and sodium carbonate.

The half-life at pH 7 at 25°C is reportedly about 260 hours, increasing to over 500 hours in the pH

range 8 to 11.