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Tr

Tromethamine

Tromethamine

A pH adjuster and buffer used in small amounts to neutralize acids and hold a formula at its target pH.

What it does

Tromethamine (TRIS) is a mild base used to neutralize acidic ingredients and buffer a formula so its pH stays steady. You'll often see it alongside carbomer-type thickeners, which need neutralizing to gel properly. It is a small-quantity formulation helper, not an active.

Also known as

tris, trometamol

This page is public and indexed on purpose (unlike profiles and drops, which are unlisted) — it’s the citation behind shared ingredient cards, and it should be findable.
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