Issue 11, 2013 - California Bill 65 Update

California Bill 65 Update

Recently, the California Office of Environmental Health Risk Assessment (OEHHA) issued a notice proposing to include methyl isobutyl ketone and trichloroethylene in the list of reproductive toxic substances in California Bill 65, and is currently investigating the relevant information
.

Methyl isobutyl ketone is mainly used as a solvent for cellulose-based and resin-based coatings in the production of pigments, pesticides and adhesives
.
Trichloroethylene is mainly used for steam degreasing of metal parts and is a common solvent
in the textile industry.
Prior to this, methyl isobutyl ketone and trichloroethylene had been included in the California Bill 65 carcinogen list
.

Meanwhile, the California Office of Environmental Health Risk Assessment is also considering modifying the maximum allowable dose of sulfur dioxide and adding it to the sulfur dioxide provision of
California Bill 65.
On July 6, 2012, the California Office of Environmental Health Risk Assessment proposed a maximum limit of 220 μg/d
for sulfur dioxide.
During the subsequent public comment period, comments were made to point to statistical errors
in the literature on which the maximum sulphur dioxide limit was calculated.
After recalculation by the California Office of Environmental Health Risk Assessment, the maximum limit of sulfur dioxide was finally set at 10,000 μg/d
.
The proposal to list sulphur dioxide as a reproductive toxic substance will be open for public comment until May 6
, 2013.
(Wei Song)