Hydroxybenzomorpholine (3,4-Dihydro-2H-1,4-benzoxazin-6-ol) — CAS 26021-57-8

General Information

Oxidative (Permanent) Hair Coloring

Hydroxybenzomorpholine is formulated directly into the oxidative hair dye system. A color chemist combines the coupler with an oxidation base and a hydrogen peroxide developer; the oxidative coupling reaction occurs inside the hair shaft, producing a dye molecule too large to diffuse back out. Permanent color fastness — resistance to washing and fading — depends on the quality of the coupling reaction, which in turn depends on consistent coupler purity and impurity control at the raw material stage.

The 1% on-head concentration ceiling, confirmed by the EU SCCNFP opinion, gives formulators a well-defined working range. At BASTONE’s specified purity level, the coupler delivers predictable color yield and shade reproducibility batch-to-batch — which matters to color house chemists calibrating product lines across multiple developer strengths and oxidation base combinations.

Hair dye formulations incorporating Hydroxybenzomorpholine appear in both consumer-market permanent color kits and professional salon products. The controlled impurity profile — specifically the 0.10% max. limits on 2,5-dimethoxyaniline and its related ethanolamine — directly supports finished product compliance under EU Cosmetics Regulation (EC) No 1223/2009 Annex III, which restricts oxidative hair dye substances and their associated impurity levels.

BASTONE operates as both manufacturer and trader of cosmetic raw materials, which means the supply chain for 3,4-Dihydro-2H-1,4-benzoxazin-6-ol sits within a single organization rather than being passed through multiple intermediaries before reaching an export desk. Each batch ships with a full Certificate of Analysis traceable to its production run — covering purity, assay, UV absorbance, impurity levels, melting point, and residual solvent, all reported against the specification table above.

For procurement teams sourcing cosmetic actives and intermediates from China, documentation quality is often the differentiator between a supplier that clears customs and regulatory review smoothly and one that generates repeated delays. BASTONE’s 10+ years of export experience means the SDS, TDS, COA, and origin documentation are prepared to the standards international buyers actually require — not produced as an afterthought when a shipment is already at port.

BASTONE’s R&D capability means technical questions get answered with substance. If a formulation team needs clarity on how a specific lot’s UV absorbance tracks against previous batches, or whether a packaging variant is feasible for a particular shipment volume, BASTONE’s technical and logistics teams can address those questions directly from production data rather than forwarding inquiries to a manufacturer they have never visited.