8-Amino-1-naphthalenesulfonic acid
8-Amino-1-naphthalenesulfonic acid (CAS: 82-75-7), with the molecular formula H2NC10H6SO3H and a molecular weight of 223.25 g/mol, is an important naphthalene derivative. This compound serves as a crucial intermediate in the synthesis of various azo dyes and pigments. Its utility extends to applications in cell biology and histology, particularly in the formulation of specific stains and dyes used for microscopic examination.
- IUPAC
- 1-Amino-8-naphthalenesulfonic acid,Peri acid
- Synonyms
- 1-Amino-8-naphthalenesulfonic acid

Dye and Pigment Synthesis
This compound is a key intermediate in the production of azo dyes and pigments, contributing to a range of colourants used in various industries. It is essential for creating specific chromophores through diazotization and coupling reactions.
Biological Staining
As a component in certain stains and dyes, 8-Amino-1-naphthalenesulfonic acid finds application in hematology and histology. It aids in differential staining techniques for examining cellular structures and tissues under a microscope.
Chemical Intermediate
Beyond dyes, it functions as a versatile chemical intermediate in organic synthesis. Its reactive amino and sulfonic acid groups allow for further functionalization to create complex molecules.
| Molecular weight | 223.25 |
|---|---|
| Linear formula | H2NC10H6SO3H |
| Melting point | >350 °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 3261 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| Safety statements (S) | 26-27-36-45 |
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-1-naphthalenesulfonic acid primarily used for?
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8-Amino-1-naphthalenesulfonic acid is primarily used as an intermediate in the synthesis of azo dyes and pigments, and also finds application in biological staining for hematology and histology.
What is the CAS number and chemical formula for 8-Amino-1-naphthalenesulfonic acid?
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The CAS number for 8-Amino-1-naphthalenesulfonic acid is 82-75-7, and its chemical formula is H2NC10H6SO3H.
What grade and purity does Tech Serve Solutions supply for 8-Amino-1-naphthalenesulfonic acid?
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Tech Serve Solutions supplies 8-Amino-1-naphthalenesulfonic acid with a minimum purity of 98%. We do not represent this product as meeting any specific pharmacopoeia standards such as USP, BP, or EP.
How should 8-Amino-1-naphthalenesulfonic acid be handled safely?
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8-Amino-1-naphthalenesulfonic acid can cause severe skin burns and eye damage (H314). Handle with appropriate personal protective equipment, including eyeshields, faceshields, and chemical-resistant gloves. Ensure adequate ventilation and use a suitable respirator if airborne exposure is likely. In case of contact, rinse immediately and seek medical attention.
How is 8-Amino-1-naphthalenesulfonic acid packed and exported?
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8-Amino-1-naphthalenesulfonic acid is typically packed in quantities suitable for laboratory and industrial use, adhering to safety regulations for transport. As a global supplier, Tech Serve Solutions exports this chemical worldwide.
How can I request a sample or quote for 8-Amino-1-naphthalenesulfonic acid?
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To request a sample or a quote for 8-Amino-1-naphthalenesulfonic acid, please contact our sales team through the website or by phone, providing your specific requirements and delivery details.
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