Sodium butylparaben

Sodium butylparaben (CAS 36457-20-2) is the sodium salt form of butylparaben, commonly supplied under trade names such as Nipabutyl Sodium. It carries no assigned E-code and is categorised within the paraben family of preservative compounds used across regulated industries.

In cosmetic formulations such as lotions and shampoos, it inhibits microbial growth by disrupting cell membrane function in bacteria and fungi, extending product shelf life. In pharmaceutical preparations, it serves as an antimicrobial preservative in topical and oral dosage forms where water-soluble paraben salts are preferred over their ester counterparts.

Sodium butylparaben is available as a white hygroscopic powder in pharmaceutical and cosmetic grades, with compliance referenced against Ph.Eur. monographs and REACH registration requirements applicable within the EU. Procurement quantities typically range from kilogram-scale laboratory packs to bulk industrial packaging depending on supplier.