National Pesticide Information Center



Acid Copper Chromate (ACC)

Wood preservatives containing ACC are only registered for industrial and commercial uses. ACC treated wood contains hexavalent chromium or chromium (VI). Chromium (VI) is a chemical in the highest EPA toxicity category for oral, dermal, and inhalation toxicity and is also a strong skin sensitizer. Protective equipment is usually required when producing or handling ACC treated wood. See the resources below for more information.

For help selecting the proper type of treated wood for any setting, consider consulting the primary standard-setting body for treated wood, the American Wood-Preservers' Association (AWPA).

If you have questions about this, or any pesticide-related topic, please call NPIC at 1-800-858-7378 (8:00am - 12:00pm PST), or email us at npic@ace.orst.edu.

Additional Resources on ACC Treated Wood:

Return to Information on Specific Types of Wood Preservatives

Last updated October 15, 2014