California Considers Diaper Ingredient Disclosure Law

A proposed bill in California aims to increase transparency in the diaper industry. Assembly Bill 1901 (AB 1901) would require diaper brands to list all intentionally added ingredients on both product packaging and online.

Impact on Consumers and Babies

The legislation, highlighted by the Environmental Working Group (EWG), could affect purchases for nearly 1.3 million babies in the state. Currently, parents have limited information regarding the materials and chemicals used in diapers, which are worn continuously by infants.

Key Provisions of AB 1901

AB 1901, introduced during the 2025–2026 legislative session, focuses on full ingredient disclosure rather than banning specific substances. Manufacturers would be required to publicly list each intentionally added ingredient, along with its Chemical Abstract Service (CAS) number and its function within the product.

Implementation Timeline

  • January 1, 2028: Ingredient information must be available on manufacturer websites and online product listings.
  • One year later: Diaper packaging sold in California must include directions to where the full ingredient list can be found.

What Ingredients Would Be Disclosed?

The disclosure requirements would extend to individual components of diapers, including wetness indicators, adhesives, dyes, and fragrances. This comprehensive approach aims to provide parents with a clearer understanding of a diaper’s composition.

Support and Enforcement

AB 1901 is co-sponsored by EWG, Consumer Reports, and Children Now, and is positioned as a consumer transparency measure. State regulators and attorneys would be authorized to enforce compliance, with potential civil or administrative penalties for violations, increasing for repeat offenses.

Next Steps for the Bill

The bill has been referred to the Assembly Committee on Environmental Safety and Toxic Materials. If approved, California would be a leading state in requiring comprehensive ingredient transparency for children’s diapers, potentially influencing similar legislation in other states.