4,4-Diaminostilbene-2,2-disulfonic Acid
4,4-Diaminostilbene-2,2-disulfonic acid (CAS: 81-11-8), commonly known as DSD acid, is a white to off-white powder used as a key intermediate for fluorescent whitening agents and dyes.
Its diamino and disulfonic acid groups support diazotization, coupling, and condensation reactions used to produce optical brighteners, azo dyes, and specialty colorants.
Commercial material is commonly supplied at about 95% purity in bags or drums.
– Key intermediate for fluorescent whitening agents.
– Used in dye and optical brightener production.
– Serves as a building block for azo dyes and colorants.
– Applied in textile, paper, and detergent-related chemistry.
Product Name: 4,4-Diaminostilbene-2,2-disulfonic Acid
For global customers, we provide complete technical documentation to support product evaluation, regulatory compliance and safe handling during transportation and application.