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Searchable Proposition 65 Chemical Database Released by Columbia Analytical


KELSO, Wash. – Columbia Analytical Services, Inc. announces a new website service that allows users to search the California Proposition 65 (Prop 65) chemical list online. The database of 775 chemicals is searchable by a CAS registry number or by the chemical name and when clicked, shows the risk level, maximum allowable dose level, type of toxicity, date listed, and listing mechanism.

“This appears be the only searchable Prop 65 chemical list on the internet,” said Trent Mueller, Webmaster for Columbia Analytical Services. “People may find it useful to do a quick web search to see if their chemical is on the list, rather than search through the entire Prop 65 document itself.”

The chemicals in the Prop 65 list are known to the state of California to cause cancer or reproductive toxicity. The Safe Drinking Water and Toxic Enforcement Act of 1986, also known as Prop 65, requires that the governor revise and republish at least once per year the list of chemicals known to the state to cause cancer or reproductive toxicity. All businesses in the state must notify Californians about significant amounts of chemicals found in their products, or those that may be released into the environment. California’s Prop 65 list is recognized nationwide as being the standard for which other states aim.

The searchable Prop 65 list is also linked to a broader database containing thousands of analytes, which may also show the chemical formula, its structure, stability, melting point, among other information. To search the list, users may visit or go to and type “Prop 65” in the search.

Columbia Analytical’s network of laboratories provide analytical testing to government agencies, industry, and consultants. Their services include general and specialty environmental testing of water, soil, air and biota samples, as well as product testing for companies in the aerospace, automotive, engineering, mining, petrochemical, pharmaceutical, pulp and paper, transportation, utilities, and waste management industries.


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