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Reminder: New Proposition 65 Requirements Effective August 2018 – California Requirement

Under new amendments to Proposition 65 warning regulations, starting on August 30, 2018, dental offices will have to comply with one or both of the following:

  • Post one Proposition 65 warning sign at all public points of entry to the dental office or in each location within the office where an exposure is reasonably likely to occur. The notice or sign must be no smaller than 5 by 5 inches and printed in no smaller than 20-point type.
  • Provide a Proposition 65 warning with the required language with or in an informed consent form signed by the patient prior to exposure.

Dental practices may choose to provide the warning via both the posted notice(s) and informed consent. The warning directs patients and employees to a website,, for more information about the specific chemicals.

In the interim, dental offices have the option of complying with existing regulations by posting three separate signs, or may choose to comply with the newly amended regulations.

The new warning sign, with the new language, can be downloaded from OSHA Review’s website. The new language is also provided below.


2018 Proposition 65 Language Approved for Dental Offices:


Certain dental procedures performed in this office can expose you to chemicals known to the State of California to cause cancer or birth defects or other reproductive harm or both. Those procedures can include sedation with nitrous oxide, root canals, placement or removal of crowns, bridges, and restorations such as mercury-containing fillings and use of dental appliances. Consult your dental care provider about these exposures and which materials are appropriate for your treatment. Additional information is also available at


Since 1992, OSHA Review, Inc. has provided dental professionals with comprehensive programs to support regulatory compliance and infection control. We are a registered continuing education provider in the state of California, specializing in Dental Practice Act, infection control, and OSHA training.

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