4,4′-Diamino-2,2′-stilbenedisulfonic acid
4,4′-Diamino-2,2′-stilbenedisulfonic acid (CAS: 81-11-8; C14H14N2O6S2) is a key organic building block with a molecular weight of 370.40. Possessing sulfonic acid groups and amine functionalities, it serves as a crucial intermediate in various chemical syntheses, particularly in the production of optical brightening agents and dyes. Its disulfonic acid structure contributes to solubility and reactivity, making it a versatile compound for industrial applications.
- IUPAC
- Amsonic acid
- Synonyms
- 81-11-8Amsonic acidC14H14N2O6S2
Intermediate for Optical Brightening Agents
This compound is widely used as a precursor in the synthesis of stilbene-based fluorescent whitening agents. These agents are incorporated into detergents, paper, and textiles to enhance perceived whiteness and brightness.
Dye Synthesis
It functions as an important intermediate in the production of azo dyes and other colorants. The amino groups allow for diazotization, leading to a range of coloured compounds used in the textile and printing industries.
Chemical Synthesis
As a versatile organic building block, 4,4′-Diamino-2,2′-stilbenedisulfonic acid is employed in the laboratory and industrial synthesis of more complex organic molecules, leveraging its reactive amine and sulfonic acid functionalities.
| Molecular weight | 370.40 |
|---|---|
| Empirical formula | C14H14N2O6S2 |
| Assay | 85% |
| Melting point | >300 °C(lit.) |
Hazard statements
- H302Harmful if swallowed
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 2583PSN2 8 / PGII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 4,4′-Diamino-2,2′-stilbenedisulfonic acid used for?
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It is primarily used as an intermediate in the synthesis of optical brightening agents and various dyes, as well as a general building block in organic synthesis.
What is the CAS number and molecular formula for 4,4′-Diamino-2,2′-stilbenedisulfonic acid?
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The CAS number is 81-11-8, and the empirical formula is C14H14N2O6S2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4,4′-Diamino-2,2′-stilbenedisulfonic acid with an assay of 85%. We do not represent this product as USP, BP, EP, or pharmacopoeia grade.
What are the main safety concerns when handling this chemical?
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This compound is classified as harmful if swallowed (H302). When handling, wear a dust mask type N95 (US), eyeshields, and gloves. Ensure adequate ventilation.
How is 4,4′-Diamino-2,2′-stilbenedisulfonic acid typically shipped?
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Shipments adhere to UN 2583 PSN2 8 / PGII regulations. We export globally, complying with all relevant international shipping standards.
How can I request a sample or a quote?
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Please contact our sales team through our website or by phone to request a sample or a detailed quotation.
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