4-Amino-3-hydroxy-1-naphthalenesulfonic acid
4-Amino-3-hydroxy-1-naphthalenesulfonic acid (CAS: 116-63-2; Formula: H2NC10H5(OH)SO3H) is a vital organic compound with a molecular weight of 239.25 g/mol. This naphthalene derivative, featuring amino, hydroxyl, and sulfonic acid groups, serves as a critical building block in chemical synthesis. It is primarily utilised in the production of dyes and as an intermediate in the creation of other complex organic molecules.
- IUPAC
- 1-Amino-2-naphthol-4-sulfonic acid

Dye Intermediate
This compound is a key intermediate in the synthesis of various azo dyes and other colorants. Its chemical structure facilitates the formation of chromophores essential for imparting colour.
Organic Synthesis Reagent
As an organic building block, it is employed in multi-step syntheses to construct more intricate molecular architectures. Its functional groups allow for diverse chemical transformations.
Research and Development
Utilised in laboratory settings for exploring new chemical reactions and developing novel compounds with potential applications in materials science and pharmaceuticals.
| Molecular weight | 239.25 |
|---|---|
| Linear formula | H2NC10H5(OH)SO3H |
| Assay | ≥97.0% g/mL |
| Melting point | 290 °C (dec.)(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
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-Amino-3-hydroxy-1-naphthalenesulfonic acid used for?
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4-Amino-3-hydroxy-1-naphthalenesulfonic acid is primarily used as an intermediate in the synthesis of dyes and as a building block in organic chemical synthesis.
What are the CAS number and formula for 4-Amino-3-hydroxy-1-naphthalenesulfonic acid?
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The CAS number is 116-63-2 and the molecular formula is H2NC10H5(OH)SO3H.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Amino-3-hydroxy-1-naphthalenesulfonic acid with an assay of ≥97.0%. This product is typically considered a technical or research grade, and TSS does not represent it as USP, BP, or EP grade.
What are the safety and handling precautions for this chemical?
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This compound requires appropriate personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter is recommended. It is classified with WGK 2 in Germany, indicating it is hazardous to water.
Is 4-Amino-3-hydroxy-1-naphthalenesulfonic acid a controlled substance?
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The provided data does not indicate that 4-Amino-3-hydroxy-1-naphthalenesulfonic acid is a controlled substance.
How is this chemical packed and exported?
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Tech Serve Solutions, as a specialist global supplier and exporter, ensures appropriate packaging for safe transport and export of chemicals in compliance with international regulations.
How can I request a quote or sample?
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To request a quote or a sample of 4-Amino-3-hydroxy-1-naphthalenesulfonic acid, please contact our sales team through the website or by phone.
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