Hexamidine diisethionate

Hexamidine diisethionate (CAS 659-40-5) is a synthetic diamidine compound supplied as a white to off-white hygroscopic powder. It is also known under the trade designations 2535RP, RP-2535, HD-100, and HP-100. No E-code applies to this substance.

In cosmetic and topical pharmaceutical formulations, hexamidine diisethionate functions as a broad-spectrum preservative by disrupting microbial cell membranes, inhibiting bacterial and fungal growth at low concentrations. It also acts as an emulsification aid, stabilising oil-in-water systems through its amphiphilic character, and finds use as a catalyst in select chemical synthesis processes.

This material is available in pharmaceutical and cosmetic grades and falls under REACH registration requirements for EU supply. Compliance documentation including SDS and CoA is available upon request. Standard packaging formats include fibre drums and multi-layer bags; custom quantities can be arranged for qualified buyers.