Hydroquinone monosulfate

Hydroquinone monosulfate (CAS 17438-29-8), also referred to as quinol sulfate, is a sulfate ester derivative of hydroquinone used as a stabilizing intermediate and antioxidant precursor in specialty chemical synthesis.

It functions primarily as a controlled-release or masked form of hydroquinone, enabling formulators to work with reduced reactivity while retaining the core functional activity of the parent compound.

In pharmaceutical manufacturing, it serves as a synthetic intermediate in the preparation of hydroquinone-based active ingredients where controlled oxidation potential is required for the final product.

Cosmetic formulators incorporate it into skin-tone-modulating preparations where a stabilized hydroquinone source is preferred over the free diol form to ensure long-term stability and efficacy.

In biotechnology and life sciences, it is used in biochemical assay development and enzyme substrate research where precise redox behavior must be maintained across various experimental conditions.

It also supports pH-buffering roles in specialty formulations requiring antioxidant activity alongside acid-base regulation, making it a versatile component in complex chemical systems.

Hydroquinone monosulfate is typically supplied as a solid powder and is available primarily in pharmaceutical-grade and research-grade specifications with high purity levels.

These grades are suited to USP and BP standards for GMP-compliant manufacturing. Packaging ranges from small quantities for R&D use to bulk quantities for industrial-scale synthesis.