Molekula
4-Amino-3-hydroxy-1-naphthalenesulfonic acid
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
4-Amino-3-hydroxy-1-naphthalenesulfonic acid (CAS 116-63-2) is an organic sulfonic acid derivative used primarily in dye synthesis, particularly for azo dyes in textiles, leather, and paper industries. Its molecular formula is H₂NC₁₀H₅(OH)SO₃H with a molecular weight of 239.25 g/mol. Store at ambient conditions. The signal word is Warning, indicating moderate hazard. Molekula supplies 4-Amino-3-hydroxy-1-naphthalenesulfonic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
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Pricing & pack sizes
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25 g — £29.50 per pack ex VAT · £35.40 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | White to slightly brownish-pink to light purple powder |
| Solubility | In sodium carbonate: passes test |
| Assay | ≥ 90% |
| Residue on Ignition | ≤ 0.1% |
| Sensitivity to phosphate | passes test |
| Sulphates (SO4)(2-) | ≤ 0.2% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 33466513 |
| CAS Number | 116-63-2 |
| IUPAC Name | 4-amino-3-hydroxynaphthalene-1-sulfonic acid |
| EC Number | 204-147-3 |
| Molecular Formula | H2NC10H5(OH)SO3H |
| Molecular Weight | 239.25 |
| Exact Mass | 239.0252 |
| SMILES | C1=CC=C2C(=C1)C(=CC(=C2N)O)S(=O)(=O)O |
| InChIKey | RXCMFQDTWCCLBL-UHFFFAOYSA-N |
| InChI | InChI=1S/C10H9NO4S/c11-10-7-4-2-1-3-6(7)9(5-8(10)12)16(13,14)15/h1-5,12H,11H2,(H,13,14,15) |
| PubChem CID | 8316 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2922.21.4000 |
| Tariff Code | 2922210090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 1-Amino-2-naphthol-4-sulfonic acid
- 1-Amino-4-sulfo-2-naphthol
- 1-NAPHTHALENESULFONIC ACID, 4-AMINO-3-HYDROXY-
- 1,2,4-Acid
- 2-Hydroxy-4-sulfo-1-naphthylamine
- 4-Amino-3-Hydroxy-1-Naphdialene Sulfonic Acid
- 4-Amino-3-hydroxynaphthalene-1-sulfonic acid
- 4-Amino-3-hydroxynaphthalene-1-sulphonic acid
- 4-Amino-3-hydroxynaphthalenesulfonic acid
- ANSK compound
Frequently asked questions
What is 4-Amino-3-hydroxy-1-naphthalenesulfonic acid (CAS 116-63-2) commonly used for?
This compound is primarily used as an intermediate in the synthesis of dyes, pigments, and pharmaceuticals, including the production of azo dyes and Eriochrome-type mordant dyes. It is also used as the reducing agent in the Fiske-Subbarow colorimetric assay for phosphate.
What is the molecular formula and molecular weight of this product?
The molecular formula is H₂NC₁₀H₅(OH)SO₃H, and the molecular weight is 239.25 g/mol.
What is the recommended storage condition for this chemical?
Store at ambient temperature in a cool, dry place, away from incompatible substances and moisture.
What purity grades or forms does Molekula supply for this product?
Molekula supplies this product in technical/industrial grade purity, typically ≥98% by HPLC or as specified.
Can Molekula supply this product in bulk quantities?
Yes, we offer bulk supply options for this product, with flexible packaging (drums, bags, or custom solutions) based on order volume.
What documentation is provided with an order of this product?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a packing list; additional documentation like batch-specific testing reports is available upon request.
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Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.