n,n-Bis(2-hydroxyethyl)-p-phenylenediamine sulfate

N,N-Bis(2-hydroxyethyl)-p-phenylenediamine sulfate, also known by the trade names Ro 371 and JAROCOL BHP, is an aromatic diamine salt registered under CAS 54381-16-7 and EC 259-134-5. It carries no assigned E-code. The compound belongs to the amine chemical category and is supplied as a white crystalline powder.

In textile and leather processing, it functions as an oxidative hair and fiber dye intermediate, coupling with oxidants to develop color directly within the substrate matrix. In personal care formulations, it serves as a primary dye precursor in permanent hair coloring systems, where its hydroxyethyl groups improve water solubility and skin compatibility compared to unsubstituted phenylenediamine bases.

This material is supplied in solid form and falls under HS code 29309090 for customs classification. Procurement should confirm REACH registration status and SDS compliance before import into the EU. Standard packaging formats for industrial supply typically include fiber drums or multi-wall bags; specific grades should be confirmed with the supplier.