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OEHHA Proposes Safe Harbor Level for Metham Sodium

OEHHA Proposes Safe Harbor Level for Metham Sodium

Author: Jack Schatz/Friday, January 26, 2018/Categories: California Law and Regulation, OEHHA, Prop65, Regulatory Proposals

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California’s Office of Environmental Health Hazard Assessment (OEHHA) has announced a proposed No Significant Risk Level for Metham Sodium an organosulfur compound, which is used as a soil fumigant, pesticide, herbicide, and fungicide. Metham Sodium is one of the most widely used pesticides in the United States, with approximately 60 million pounds used in 2001. Metham sodium is the sodium salt of methyl di-thiocarbamate.

The agency announced its’ proposed a No Significant Risk Level for the chemical of 290 Micrograms/day.

Metham Sodium was listed as a Proposition 65 carcinogen in November 1998 based upon its identification as such by the U.S. Environmental Protection Agency.   The chemical was also determined to be a developmental toxicant in May 1998 by its identification by the U.S. EPA.

OEHHA reviewed toxicity studies published by U.S. EPA to derive a Safe Harbor Level for the chemical.


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