Product testing / Proposition 65
Heavy metals testing
for Prop 65 assessments.
Obtain element concentrations for a product-specific Proposition 65 review. Include how the product is used, the relevant chemical forms and the reporting limits your assessment needs.
For food, supplements, cosmetics or another product, start with the material and elements to be measured. Include a buyer or assessor specification when one exists. Arsenic, cadmium, lead and mercury are common requests, but they are not a universal Prop 65 panel for every product.
A report supplies analytical data for the submitted sample. A warning determination also depends on exposure, the applicable chemical listing and the relevant legal framework. We do not label a concentration result as a universal Prop 65 pass or fail.
Concentration and exposure use different units.
A product concentration such as mg/kg describes an amount of an element per mass of product. An exposure estimate also needs an amount used or consumed and an applicable exposure route.
Illustrative arithmetic only
0.10 mg/kg × 5 g/day = 0.50 µg/dayThis assumes the stated product amount and simple mass conversion. It is not a measured result, a safe level or a complete exposure assessment.
State whether you need a mass-based concentration, a per-serving calculation or another reporting basis. Do not compare a concentration in ppm directly with a daily-exposure value in micrograms per day.
Match the chemical form and route.
OEHHA safe-harbor levels include NSRLs for cancer endpoints and MADLs for reproductive endpoints. The applicable chemical and exposure route matter. A total-element analysis may not establish the concentration of the particular chemical form relevant to an assessment.
Inorganic arsenic and total arsenic, for example, are different measurement requests. If your assessment requires a specific species, include that requirement before testing. Do not assume a total-metals panel includes speciation.
Include these details
- Product type and sample identifiers
- Requested elements and any chemical-form requirement
- Serving amount or intended product use and exposure route
- Assessor/buyer requirements and needed reporting limits
- Lot count and desired schedule
Use the laboratory report with the other information required for your assessment. A Prop 65 assessment does not replace broader product quality or safety testing.
Sampling and technical guidance
Testing inquiries
Request a testing quote.
Tell us the sample type, elements and number of samples.