8-Amino-2-naphthalenesulfonic acid
8-Amino-2-naphthalenesulfonic acid (CAS: 119-28-8; Formula: H2NC10H6SO3H; MW: 223.25) is a vital organic compound featuring both an amine and a sulfonic acid group on a naphthalene core. This bifunctional nature makes it a valuable intermediate in the synthesis of dyes, pigments, and other specialty organic chemicals. Tech Serve Solutions offers this compound for chemical research and industrial applications, adhering to strict quality standards.
- IUPAC
- 1-Naphthylamine-7-sulfonic acid,Cleves acid-1,7
- Synonyms
- 1-Naphthylamine-7-sulfonic acidCleves acid-1,7

Dye and Pigment Synthesis
8-Amino-2-naphthalenesulfonic acid serves as a key building block in the production of azo dyes and pigments. Its structural features allow for versatile coupling reactions, leading to a wide range of colours and properties required in the textile and printing industries.
Organic Synthesis Intermediate
This compound is frequently employed as an intermediate in complex organic synthesis pathways. Its reactive functional groups enable its transformation into various substituted naphthalenes and heterocyclic compounds for further chemical development.
Specialty Chemical Manufacturing
It finds application in the manufacture of niche chemicals where specific naphthalene-derived structures are required. Its use contributes to the development of advanced materials and functional organic molecules.
| Molecular weight | 223.25 |
|---|---|
| Linear formula | H2NC10H6SO3H |
| Assay | ≥97.0% (T) |
| Melting point | ≥300 °C(lit.) |

Hazard statements
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 2585 8/PG 3 |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| Safety statements (S) | 26-36/37/39-45 |
| Ignition residue | ≤1% |
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 8-Amino-2-naphthalenesulfonic acid used for?
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8-Amino-2-naphthalenesulfonic acid is primarily used as a building block in the synthesis of dyes, pigments, and other specialty organic chemicals. It acts as a versatile intermediate in various organic synthesis pathways.
What is the CAS number and molecular formula?
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The CAS number for 8-Amino-2-naphthalenesulfonic acid is 119-28-8, and its molecular formula is H2NC10H6SO3H.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 8-Amino-2-naphthalenesulfonic acid with an assay of ≥97.0% (T). We do not represent this product as USP, BP, EP, or other pharmacopoeia grades.
What are the main safety hazards associated with this chemical?
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This compound causes severe skin burns and eye damage (H314). It is classified as Danger and requires appropriate personal protective equipment, including eyeshields, face shields, gloves, and suitable respiratory protection.
How is this chemical packed, shipped, and exported?
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As a specialist global supplier, Tech Serve Solutions ensures that 8-Amino-2-naphthalenesulfonic acid is packed, handled, and exported in compliance with all relevant international shipping regulations for hazardous materials (UN 2585, Class 8).
How can I request a sample or a quote for 8-Amino-2-naphthalenesulfonic acid?
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To request a sample or obtain a quotation, please contact our sales team through the website or by calling our main office. Please reference the product name and CAS number.
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