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EC number: 246-805-2
CAS number: 25306-75-6
When water is added to Sodium isobutyl xanthate it reacts with water to
form the others substances: alcohol, sodium carbonate, trithiocarbonate
and carbon disulphide because of its high water solubility.
Hydrolysis will be a significant factor in determining the environmental
fate of Sodium isobutyl xanthate. In neutral or mildly alkaline
solutions, Sodium isobutyl xanthate decomposes to the alcohol, carbon
disulphide, sodium carbonate and sodium trithiocarbonate, the two salts
arising from neutralisation of carbon disulphide with the sodium
hydroxide liberated. In more strongly alkaline media, hydrogen sulphide
is liberated. However, strongly alkaline conditions are unlikely to be
encountered under the conditions of use in the mining industry. 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.
Sodium isobutyl xanthate is hydrolytically unstable when exposed to
acidic conditions, reverting rapidly to isobutyl, carbon disulphide and
caustic soda, and therefore will not persist in the acidic environment
of tailings dams. If discharged to waterways, the chemical would be
likely to persist for at least some days, hydrolysing only slowly in
this more neutral environment. However, it is not expected to
bioaccumulate in view of its ionic character
Sodium isobutyl xanthatedoes not
fulfil the criteria for persistency, bioaccumulation and toxicity as
laid down in the TGD (EC, 2003). Therefore, this substance is not
consideredon PBT or vPvBsubstance.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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