If a trade secret is used to manufacture a mixture, what must be printed in Section 3?

• A. A Statement That the Specific Chemical Identity and/or Exact Percentage of Composition Has Been Withheld
• B. The Full Chemical Identity Only
• C. The Hazard Statements Only
• D. The Expected Exposure Limit

Answer: (A)

Understanding how trade secrets are handled in the Safety Data Sheet is essential. When a mixture uses an ingredient whose identity or exact amount is protected as a trade secret, Section 3 must still convey that chemistry while preserving confidentiality. The correct approach is to print a statement in Section 3 that the specific chemical identity and/or exact percentage of composition has been withheld. This signals to the user that a secret ingredient is present and that the full identity and exact amount aren’t disclosed, yet it does not prevent hazard information from being communicated through the rest of the document.

This fits the intent of hazard communication: workers receive the necessary hazard information from Section 2 and the rest of Section 3 about the other disclosed ingredients, while the trade secret remains protected. Releasing the full chemical identity would defeat the protection for the secret ingredient. Providing only hazard statements would omit the necessary composition information, and listing an exposure limit in Section 3 would be out of place since exposure limits are found elsewhere in the SDS.