PEG-25 PABA
CAS Number
116242-27-4
What is PEG-25 PABA?
PEG-25 PABA (CAS 116242-27-4) is a PEG-esterified derivative of para-aminobenzoic acid used as a water-soluble UV filter in personal care and pharmaceutical formulations.
Where is PEG-25 PABA used?
- Sunscreen and daily SPF products: UVB protection in water-based systems where oil-soluble UV filters are unsuitable
- Lotions, gels and sprays: broad water compatibility
- Hair care such as leave-on conditioners and styling formulations: shields hair fiber from UV-induced color fading and protein degradation
- Pharmaceutical topical preparations: photostability of the active ingredient is a critical formulation requirement
- It absorbs UVB radiation, protecting both the end user and the formulation from photodegradation.
Good to know: Buyers should confirm concentration, water content, and compliance with regional UV filter approval lists, including Annex VI of the EU Cosmetics Regulation, before sourcing.
Other Names (Synonyms)
Poly(oxy-1,2-ethanediyl), .alpha.,.alpha.'-[[(4-carboxyphenyl)imino]di-2,1-ethanediyl]bis[.omega.-hydroxy-, ester with .alpha.-hydro-.omega.-hydroxypoly(oxy-1,2-ethanediyl) (1:1)|2-hydroxyethyl 4-[bis[2-(2-hydroxyethoxy)ethyl]amino]benzoate|α-hydro-ω-hydroxypoly(oxy-1,2-ethanediyl) ester ether with 4-[bis(2-hydroxyethyl)amino]benzoic acid (3:1)