What is it?
Cetrimonium Bromide is a substance used in topical anti-bacterial and anti-fungal preparations, lice kits, cosmetics, and hair care products. It is also a surfactant and emulsifier.

How can I avoid it?
Skin contact with Cetrimonium Bromide is required for it to cause a rash. Discontinuation of exposure to products containing Cetrimonium Bromide should result in improvement and/or the resolution of your dermatitis. By law, all products made in the U.S. for topical use have ingredients listed either on the product package or the box that contains it. Check the label of all skincare products for this ingredient. If there is not enough information, ask your pharmacist or contact the company directly. At work, request a Safety Data Sheet (SDS) to help identify potential sources of exposure.

  • Throat lozenges
  • Antiseptic gels and creams
  • Vaccine production
  • Skincare products/Cosmetics
    • Shampoos/Conditioners
    • Hair dye/Colorants
    • Masks
    • Detangling or anti-frizz hair products
    • Leave in hair moisturizers
Other names for Cetrimonium Bromide:
  • 1-Hexadecanaminium
  • N,N,N-trimethyl-bromide
  • Cetyl trimethyl ammonium bromide
  • n-Hexadecyltrimethylammonium bromide
  • CTAB
  • N,N,N-Trimethylhexadecan-1-aminium bromide
Potential cross-reacting/co-reacting antigens:
  • Other quaternary ammonium surfactants


How safe is it?

Hang tight. We're thinking.