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BSMI revises wood preservation standards
Organization: Bureau of Standards, Metrology & Inspection, M.O.E.A., R.O.C.        Publish Date: 2016-06-23 12:32
Green consumption and healthy living have driven the demand for wood use in interior designing, recreational facilities and public buildings in recent years. On December 28, 2015, the Bureau of Standards, Metrology & Inspection (BSMI) revised three standards for wood preservation to protect consumer safety and support the global consensus on environmental protection.

Chromated copper arsenate (CCA) is a common wood preservative for timber treatment. However, it can cause pollution and harm to people. In view of this, the BSMI has revised the following standards to regulate wood preservation:
"CNS 3000 Wood treated with pressurized infiltration of preservatives"
"CNS 14495 Wood preservatives"
"CNS 14730 Method of test for preservative retention of treated wood"

Taiwan's weather is hot and humid. Since wood quality and life span of wood are easily affected by environmental and biological factors, preservatives are used to help extend the life of wood materials and improve their durability, said the BSMI. CCA is a wood preservative comprised of arsenic, chromium, and copper, and it is one of the effective wood preservatives. However, CCA may release heavy metals arsenic and chromium which may do harm to people and the environment due to weather, rainfall and soil acidity.

The Environmental Protection Administration (EPA) under the Executive Yuan has already revised"The Guidelines on Regulated Toxic Chemical Substances and the Management of Their Handling" on August 25, 2014 and banned CCA from use as wood preservatives as of January 1, 2016.

Following EPA's ban and in response to the international trend of environmental protection, the BSMI has revised wood preservation standards. According to the revised CNS 3000 and CNS 14495, CCA is no longer a useable wood preservative. Meanwhile, environmentally friendly wood preservatives ACQ(Copper/quarternary ammonium compound series), CuAz(Copper/azole compound series) and BAAC(Boron/quarternary ammonium compound series) are now subject to the standards for compliance. The public and testing authorities can refer to the CNS 14730 for ways to test for CCA residues.

Wood preservatives can give wood materials antiseptic and termite proofing performance effectively. In addition, they can extend the lifetime of wood materials. To protect user safety and following EPA regulations, the BSMI calls on all wood-related businesses to consider environmentally friendly wood preservatives listed in the revised standards, which can also reduce the damage to the environment and human body, in order to provide people a more healthy, high-quality living environment.

For more information, please visit CNS Online Service at

Agency in charge: Department of Standards (First Division)
Contact person: Mr. Shih-Wei Ni
Telephone: (02)3343-5100
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