On December 30, 2005, the Office of Environmental Health Hazard Assessment (OEHHA) published a notice in the California Regulatory Notice Register (Register 05, No. 53-Z) extending the public comment period related to the announcement of its intent to list 2,4-D (2,4 dichlorphenoxy) acetic acid and certain related compounds (originally published on November 18, 2005 in CRNR Register 05, No. 47-Z) under Proposition 65 as chemicals known to the state to cause reproductive toxicity in accordance with the regulatory criteria in Section 12306 of Title 22 of the California Code of Regulations. The extended public comment period was scheduled to close on February 2, 2006. OEHHA has received additional requests from interested parties seeking further extension of the comment period to allow for the submission of complete and relevant scientific information. OEHHA hereby extends the public comment period for (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; and 2,4-D dimethylamine salt for 45 days to 5 p.m., Monday, March 20, 2006.