Candidates Found Not to Meet the Criteria: 2,4-dichlorphenoxy acetic acid (2,4-D); 2,4-D n-butyl ester; 2,4-D isopropyl ester; 2,4-D isooctyl ester; propylene gylcol butyl ether ester (of 2,4-D); 2,4-D butoxyethanol ester; and 2,4-D dimethylamine salt

Candidates for Listing Via the Authoritative Bodies Mechanism Found Not to Meet the Formal Identification Criteria: 2,4-dichlorphenoxy acetic acid (2,4-D); 2,4-D n-butyl ester; 2,4-D isopropyl ester; 2,4-D isooctyl ester; propylene gylcol butyl ether ester (of 2,4-D); 2,4-D butoxyethanol ester; and 2,4-D dimethylamine salt

On November 18, 2005, the California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment (OEHHA) issued a Notice of Intent to List 2,4-dichlorphenoxy acetic acid (2,4-D); 2,4-D n-butyl ester; 2,4-D isopropyl ester; 2,4-D isooctyl ester; propylene gylcol butyl ether ester (of 2,4-D); 2,4-D butoxyethanol ester; and 2,4-D dimethylamine salt as known to the state to cause reproductive toxicity under the Safe Drinking Water and Toxic Enforcement Act of 1986¹ (Register 2005, No. 46-Z).  This action was proposed under the authoritative bodies listing mechanism,² based on documents published by the U.S. Environmental Protection Agency (U.S. EPA) on 2,4-dichlorphenoxy acetic acid.  The documents are titled, “Drinking Water Criteria Document for 2,4-D” (U.S. EPA, 1988) and “Reregistration Eligibility Decision for 2,4-D” (U.S. EPA, 2005).

OEHHA has determined that there is insufficient evidence that the criteria in Title 27, California Code of Regulations section 25306(d) have been met. Therefore, OEHHA will not proceed at this time with the Proposition 65 listing process for 2,4-D salts and esters as known to cause reproductive toxicity.

Chemical Reference

• 2,4-Dichlorophenoxyacetic Acid
• 2,4-D n-Butyl Ester
• 2,4-D Isopropyl Ester
• 2,4-D Isooctyl Ester
• Propylene Glycol Butyl Ether Ester (of 2,4-D)
• 2,4-D Butoxyethanol Ester
• 2,4-D Dimethylamine Salt

Related Notices

• Notice of Intent to List Chemicals: (2,4-dichlorphenoxy) acetic acid, 2,4-D n-butyl ester, 2,4-D isopropyl ester, 2,4-D isooctyl ester, Propylene gylcol butyl ether ester (of 2,4-D), 2,4-D butoxyethanol ester, 2,4-D dimethylamine salt

  Nov 18, 2005

Footnotes and References

References
US Environmental Protection Agency (US EPA, 1988). Drinking Water Criteria Document for 2,4-D. Environmental Criteria and Assessment Office, Office of Health and Environmental Assessment.

U.S. Environmental Protection Agency (U.S. EPA, 2005). Reregistration Eligibility Decision for 2,4-D. Office of Prevention, Pesticides and Toxic Substances, U.S. Environmental Protection Agency.

¹ Commonly known as Proposition 65, the Safe Drinking Water and Toxic Enforcement Act of 1986 is codified in Health and Safety Code section 25249.5 et seq.

² See Health and Safety Code section 25249.8(b) and Title 27, Cal. Code of Regs., section 25306.