Molekula
2-Hydroxy-4-methylbenzenesulfonic 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-Hydroxy-4-methylbenzenesulfonic acid is an aromatic sulfonic acid used primarily in the synthesis of dyes, pharmaceutical intermediates, and specialty chemicals. It acts as a key building block in organic synthesis due to its reactive hydroxyl and sulfonic acid groups. This chemical has the CAS number 22356-80-5, with a molecular formula of CH3C6H3(OH)SO3H and a molecular weight of 188.20 g/mol. It is stored at ambient conditions but requires careful handling due to its **Danger** classification under GHS. Molekula supplies 2-hydroxy-4-methylbenzenesulfonic 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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Specifications
| Property | Value |
|---|---|
| Appearance | Off-white to pale red solid |
| Purity (HPLC) | ≥96.0 % |
| Identification (NMR) | Conforms to Structure |
| Identification (MS) | Conforms to Structure |
| Elemental Carbon | ≥43.29% |
| Elemental Analysis H | ≥4.12% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90034806 |
| CAS Number | 22356-80-5 |
| IUPAC Name | 2-hydroxy-4-methylbenzenesulfonic acid |
| EC Number | 244-933-3 |
| Molecular Formula | CH3C6H3(OH)SO3H |
| Molecular Weight | 188.20 |
| Exact Mass | 188.0143 |
| SMILES | CC1=CC(=C(C=C1)S(=O)(=O)O)O |
| InChIKey | GCFPFWRHYINTRX-UHFFFAOYSA-N |
| InChI | InChI=1S/C7H8O4S/c1-5-2-3-7(6(8)4-5)12(9,10)11/h2-4,8H,1H3,(H,9,10,11) |
| PubChem CID | 89674 |
| UN Number | UN3261 |
| REACH Code | Y110 |
| HTS Code | 2908999000 |
| Tariff Code | 2908990000 |
Safety & GHS
-
Corrosive
GHS05
-
Health Hazard
GHS07
Hazard statements
- H302 Harmful if swallowed
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H335 May cause respiratory irritation
- H412 Harmful to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- 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, 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
- 2-hydroxy-4-methylbenzene-1-sulfonic acid
- 2-Hydroxy-4-methylbenzenesulphonic acid
- 6-sulfo-m-cresol
- GCFPFWRHYINTRX-UHFFFAOYSA-N
- METACRESOL-6-SULFONIC ACID
- p-Toluenesulfonic acid, 2-hydroxy
Frequently asked questions
What is 2-Hydroxy-4-methylbenzenesulfonic acid commonly used for?
It is primarily used as an intermediate in the synthesis of dyes, pharmaceuticals, and agrochemicals, as well as in the manufacture of surfactants and other organic chemicals.
What is the molecular formula and molecular weight of this compound?
The molecular formula is **CH₃C₆H₃(OH)SO₃H**, and the molecular weight is **188.20 g/mol**.
How should this chemical be stored?
Store at **ambient temperature** in a cool, dry place, away from incompatible substances, and ensure proper ventilation.
What grades or purities of 2-Hydroxy-4-methylbenzenesulfonic acid does Molekula supply?
Molekula supplies this compound in **technical and reagent grades**, with purity levels specified on the product datasheet.
Can Molekula supply this product in bulk quantities?
Yes, we offer bulk supply options—please contact our sales team for pricing and availability on larger quantities.
What documentation comes with an order of this chemical?
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.