The Index · pH adjuster / neutralizer
Tromethamine
Tromethamine
Organic amine base used to neutralize carbomers and set formula pH.
FunctionalFunctional ingredient, not graded for skin benefits
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Organic amine base used to neutralize carbomers and set formula pH.
What it does
Common carbomer neutralizer in clear gels and fluid SPFs.
The evidence
Functional ingredient (not graded for skin benefits): CIR tromethamine; processing aid rather than bioactive. Credible chemical identity and cosmetic-use context come from CIR/SCCS/manufacturer INCI definitions and databases such as SpecialChem/PubChem[1].
How to use it
Expect this as a supporting INCI line item unless labeled as a featured active.
What it does in the formula
Functional ingredient — not graded for skin benefits
Organic amine base used to neutralize carbomers and set formula pH.[1]
Safety & limits
Source and region, always
all — Used in cosmetics within conventional leave-on/rinse-off levels; see cited safety literature.[1] CA US EU UK
Sources · 2
Numbered as cited in the text
- [1]Cosmetic Ingredient Review. Tromethamine. CIR (2013)regulator
- [2]SpecialChem. SpecialChem INCI profile: Tromethamine. SpecialChem (2024)other
Revision history
18 Sept 2026Drafted by botTheSkindex Desk