4,5-Diamino-1-pyrazole sulfate
4,5-Diamino-1-(2-hydroxyethyl)pyrazole sulfate (CAS 155601-30-2) is a specialized heterocyclic aromatic amine salt utilized predominantly as a primary intermediate in oxidative hair-dye formulations. Structurally featuring a pyrazole ring substituted with primary amine groups and a hydroxyethyl chain, this compound serves as an effective developer precursor. During the hair-coloring process, it reacts oxidatively with secondary couplers in the presence of an alkalizing agent and hydrogen peroxide to form large, stable colored dye molecules inside the hair cortex. Its unique chemical architecture allows it to deliver vibrant, long-lasting shades with excellent wash fastness and minimal skin sensitization compared to older phenylenediamine derivatives.
– Permanent Hair Colorants: Actively formulated into oxidative hair dye systems as a primary intermediate to generate rich brown, red, and dark color spectrums.
– Professional Salon Formulations: Used in multi-component permanent coloring kits designed for professional hair salons requiring reliable grey coverage and color longevity.
– Cosmetic Dye Intermediates: Employed in specialized color-refreshing treatments and semi-permanent formulations requiring high resistance to fading and environmental degradation.
Product Name: 4,5-Diamino-1-pyrazole sulfate
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