p-Aminobenzoic acid

p-Aminobenzoic acid (CAS 150-13-0), also known as PABA, Vitamin Bx, Amben, and Paraminol, is an organic acid carrying both an amine and a carboxylic acid group on a benzene ring. These bifunctional groups give it distinct reactivity that underpins its role across several industrial sectors. It carries no assigned E-code.

In personal care formulations, PABA acts as a UV-absorbing colorant and hair dye intermediate by conjugating with reactive dye precursors through its amine group. In polymer and textile processing, the carboxylic acid group participates in crosslinking reactions with polyamides and epoxy systems, improving substrate adhesion and durability. Its amphoteric character also makes it effective as a pH buffer in pharmaceutical preparations.

PABA is supplied as a crystalline powder meeting Ph.Eur. and USP compendial standards, with REACH-compliant documentation available for EU procurement. It is classified under HS code 29224995. Standard packaging includes 25 kg fiber drums, with smaller quantities available on request.