Molekula
2-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
2-Naphthalenesulfonic acid is an aromatic sulfonic acid widely used as a dye intermediate, pH regulator, and in the synthesis of azo dyes, surfactants, and pharmaceuticals. It is documented as a starting material for beta-naphthol, a concrete plasticizer additive, and a processing chemical in textile, leather and pulp-and-paper manufacturing. It appears as a white to off-white crystalline powder with high solubility in water and organic solvents. This product has a CAS number of 120-18-3, a molecular formula of C10H7SO3H, and a molecular weight of 208.23 g/mol. It is classified with a **Signal Word: Danger** and should be stored at ambient conditions. Molekula supplies 2-Naphthalenesulfonic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £46.50 per pack ex VAT · £55.80 inc. VAT
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Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Off-white crystal |
| Water | <35% |
| Purity (HPLC) | >98% |
| Free acid | <2% |
| Metallic Ions | <20ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Vapour Pressure | 0.00000002 mmHg |
Source: PubChem CID 8420 (Haz-Map)
Identification
| Property | Value |
|---|---|
| SKU | 78651201 |
| CAS Number | 120-18-3 |
| IUPAC Name | naphthalene-2-sulfonic acid |
| EC Number | 204-375-3 |
| Molecular Formula | C10H7SO3H |
| Molecular Weight | 208.23 |
| Exact Mass | 208.0194 |
| SMILES | C1=CC=C2C=C(C=CC2=C1)S(=O)(=O)O |
| InChIKey | KVBGVZZKJNLNJU-UHFFFAOYSA-N |
| InChI | InChI=1S/C10H8O3S/c11-14(12,13)10-6-5-8-3-1-2-4-9(8)7-10/h1-7H,(H,11,12,13) |
| PubChem CID | 8420 |
| UN Number | UN2583 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29041032 |
| Tariff Code | 2904100090 |
Safety & GHS
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Corrosive
GHS05
Hazard statements
- H290 May be corrosive to metals
- H303 May be harmful if swallowed
- H314 (sub cat. 1A) Causes severe skin burns and eye damage
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- 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, 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
- 2-naphtalenesulfonic acid
- 2-Naphthalenesulfonic acid, monohydrate
- 2-Naphthylsulfonic acid
- 2-napthalenesulfonic acid
- 2-Sulfonaphthalene
- beta-Naphthalenesulfonic acid
- beta-Naphthylsulfonic acid
- Kyselina 2-naftalensulfonova
- Naphthalene-2-sulfonic acid
- Naphthalene-2-sulphonic acid
Frequently asked questions
What is 2-Naphthalenesulfonic acid commonly used for?
It is primarily used as an intermediate in the synthesis of dyes, pigments, and pharmaceuticals, as well as in the production of surfactants and other specialty chemicals.
What is the molecular formula and molecular weight of 2-Naphthalenesulfonic acid?
The molecular formula is **C10H7SO3H** and the molecular weight is **208.23 g/mol**.
How should 2-Naphthalenesulfonic acid be stored?
Store at **ambient temperature** in a cool, dry place, away from incompatible substances and moisture.
What grades or purities of 2-Naphthalenesulfonic acid does Molekula supply?
Molekula supplies **technical-grade** 2-Naphthalenesulfonic acid, suitable for industrial applications.
Can Molekula supply 2-Naphthalenesulfonic acid in bulk quantities?
Yes, we offer bulk supply options for 2-Naphthalenesulfonic acid, with quantities tailored to your production needs.
What documentation comes with an order of 2-Naphthalenesulfonic acid?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a product specification sheet.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.