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Environmental fate & pathways

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Expert Judgement

When water is added to Reaction mass of SIBX it reacts with water to form the others substances: alcohol, sodium carbonate, trithiocarbonate and carbon disulphide.

Carbon disulphide (CAS number 75–15–0) it is the major decomposition product, which is liquid and have to be considered.

The biodegradation of CS2 was >80 % after 28 days of exposure, therefore CS2 is readily biodegradable. Sodium isobutyl xanthate readily decomposes to carbon disulphide, especially in the presence of moisture/water.

Therefore, the Biodegradation in water of carbon disulphide (CS2) need to be considered in the assessment of sodium isobutyl xanthate.

The biodegradation of Isobutyl Alcohol was >74 % after 28 days of exposure, therefore Isobutyl Alcohol is readily biodegradable. Reaction mass of SIBX readily decomposes to Isobutyl Alcohol, especially in the presence of moisture/water. Isobutyl Alcohol is both reagents used in the manufacture, as well as decomposition products.

Therefore, the Biodegradation in water of Isobutyl Alcohol need to be considered in the assessment of sodium isobutyl xanthate.

These results suggest that Reaction mass of SIBX will be readily biodegradable and it is not expected to persist in the environment.