Products available for purchase from Fast DMS may meet the RoHS guidelines for electronic components and hardware upon customer request at project instantiation. These products may also comply with the requirements of the Directive (EU) 2015/863 on the Restriction of the Use of certain Hazardous Substances in Electrical and Electronic Equipment (RoHS) directive for banned substances. This Directive restricts the use of the following 10 substances by setting the following limits in part per million (ppm) by weight for each individual component:

  1. Lead (Pb), < 1000 ppm
  2. Mercury (Hg), < 100 ppm
  3. Cadmium (Cd), <100 ppm
  4. Hexavalent chromium (Cr6+), < 1000 ppm
  5. Polybrominated biphenyls (PBB), < 1000 ppm
  6. Polybrominated diphenyl ether (PBDE), < 1000 ppm
  7. Bis(2-ethylhexyl) phthalate (DEHP), < 1000 ppm
  8. Butyl benzyl phthalate (BBP), < 1000 ppm
  9. Dibutyl phthalate (DBP), < 1000 ppm
  10. Diisobutyl phthalate (DIBP), < 1000 ppm


Proposition 65, officially known as the Safe Drinking Water and Toxic Enforcement Act of 1986, was enacted as a ballot initiative in November 1986. The proposition protects the state’s drinking water sources from being contaminated with chemicals known to cause cancer, birth defects or other reproductive harm, and requires businesses to inform Californians about exposures to such chemicals.

More information about California Proposition 65 is available at:

Proposition 65 requires the state to maintain and update a list of chemicals known to the state to cause cancer or reproductive toxicity.

This list is much more extensive than the 10 substances regulated by RoHS. It is quite likely that some Prop 65 substances exist in products that fully comply with the RoHS directives.

Furthermore, RoHS regulates the concentration of 10 substances but does not attempt to regulate exposure levels of these 10 substances. In general, lower concentrations will result in lower exposure levels. RoHS minimizes exposure by reducing these 10 substances to very low levels. In contrast, Prop 65 sets exposure limits for how much of these and other toxins will be absorbed, ingested, or inhaled when the product is used. Unfortunately, actual exposure is a function of how the product is used, misused and disposed.

Due to the large variety of custom parts made by a wide array of different manufacturers, it is possible that some pieces delivered for a project contain levels of Prop 65 substances that the State of California deems harmful. If the customer wishes parts to be Prop 65 compliant, Fast DMS asks its customers to request so at project instantiation so potentially harmful chemicals can be identified and formally disclosed on Fast DMS letterhead.