Non-CCA Wood Preservatives 
At NPIC our goal is to promote informed decision-making based on sound science. In response to several inquiries about the potential health concerns associated with treated wood, NPIC presents this collection of science-based articles, fact-sheets and resources.
This page represents one subtopic, other topics are available at the main index page.
For information concerning CCA treated wood (wood treated with copper, chromium and arsenic) please see our CCA Treated Wood page.
If you have questions about this, or any pesticide-related topic, please call NPIC at 1-800-858-7378 (seven days per week, 6:30am-4:30pm PST), or send an email to npic@ace.orst.edu.
Alkaline Copper Quaternary (ACQ)
Environmental Protection Agency (EPA)
(Pursuant to EPA issued PR Notice 88-2, ADBAC and DDAC Grouped under ACQ)
- ACQ - An Alternative to CCA
- Substance Registry System
- Alkyl Dimethyl Benzyl Ammonium Chloride (ADBAC) Preliminary Risk Assessment
- Reregistration Eligibility Decision for Alkyl Dimethyl Benzyl Ammonium Chloride (ADBAC)
- Incident Reports Associated with Quaternary Ammonium Compounds (ADBAC)
- Ecological Hazard and Environmental Risk Assessment Chapter (ADBAC)
- Toxicology Disciplinary Chapter for the Re-Registration Eligibility Decision (RED) Risk Assessment (ADBAC)
- Reregistration Eligibility Decision for Aliphatic Alkyl Quaternaries (DDAC)
- Didecyl Dimethyl Ammonium Chloride Dietary Risk Assessment
- Didecyl Dimethyl Ammonium Chloride (DDAC) Risk Assessment
- Green Chemistry: 2002 Designing Greener Chemicals Award
Recent Studies
- Biochemical effects of didecyldimethylammonium chloride (DDAC) exposure and osmoregulatory stress on juvenile coho salmon, oncorhynchus kisutch; Johnston et al. 1998
- Effects of didecyldimethylammonium chloride (DDAC) on the swimming performance, gill morphology, disease resistance, and biochemistry of rainbow trout (Oncorhynchus mykiss); Wood et al. 1996.
- Acute Toxicity Of A Didecyldimethylammonium Chloride-Based Wood Preservative, Bardac2280, to Aquatic Species; Farrell et al. 1998.
- The Lethal and Sublethal Toxicity of Didecyldimethylammonium Chloride in early life Stages of White Sturgeon, Acipenser Transmontanus; Swee Joo Teh et al. 2003.
