Molekula
p-Toluenesulfonyl chloride
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
p-Toluenesulfonyl chloride is an aromatic sulfonyl chloride widely used as a sulfonylating agent in organic synthesis, pharmaceuticals, and agrochemical production. It functions as a key reagent for introducing tosyl groups in reactions like tosylation of alcohols and amines. This chemical has a CAS number of 98-59-9, a molecular formula of (CH3)C6H4SO2Cl, and a molecular weight of 190.65 g/mol. It should be stored at ambient conditions and handled with caution, as it carries a "Danger" signal word.
Molekula supplies p-Toluenesulfonyl chloride at ⩾ 98.0% purity in 1 kg packs, from $145.60 excl. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 5 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
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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1 kg — $145.60 per pack
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Other grades of p-Toluenesulfonyl chloride
| Grade | Purity | Price |
|---|---|---|
| 4-Toluenesulfonyl chloride | ⩾ 99.0% purity | Price on request |
Specifications
| Property | Value |
|---|---|
| Appearance | White to Off-white powder |
| Purity | ⩾ 98.0% |
| Free acid | ≤ 0.1% |
| Water (KF) | ≤ 0.1% |
| Identification (IR) | Conforms to structure |
| o-methylbenzenesulphonyl chloride | ≤ 2.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | III |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Crystals |
| Melting Point | 69-71 °C |
| Boiling Point | 146 °C at 15 mmHg |
| Vapour Pressure | 0.16 Pa at 25 °C |
Source: PubChem CID 7397 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 79234573 |
| CAS Number | 98-59-9 |
| IUPAC Name | 4-methylbenzenesulfonyl chloride |
| EC Number | 202-684-8 |
| Molecular Formula | (CH3)C6H4SO2Cl |
| Molecular Weight | 190.65 |
| Exact Mass | 189.9855 |
| SMILES | CC1=CC=C(C=C1)S(=O)(=O)Cl |
| InChIKey | YYROPELSRYBVMQ-UHFFFAOYSA-N |
| InChI | InChI=1S/C7H7ClO2S/c1-6-2-4-7(5-3-6)11(8,9)10/h2-5H,1H3 |
| PubChem CID | 7397 |
| UN Number | UN3261 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29049940 |
| Tariff Code | 2904990030 |
Safety & GHS
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Corrosive
GHS05
-
Health Hazard
GHS07
Hazard statements
- H290 May be corrosive to metals
- H315 Causes skin irritation
- H317 May cause an allergic skin reaction
- H318 Causes serious eye damage
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P333+313 IF skin irritation or a rash occurs: Get medical advice/attention
- P337+313 If eye irritation persists get medical advice/attention
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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- 4-methylbenzene-1-sulfonyl chloride
- 4-Methylbenzenesulfonyl chloride
- 4-Toluenesulfonyl chloride
- p-Methylbenzenesulfonyl chloride
- p-Toluenesulfochloride
- p-Toluenesulfonic acid chloride
- p-Toluenesulphonyl chloride
- p-Tolylsulfonyl chloride
- p-Tosyl chloride
- Tosyl chloride
Frequently asked questions
What is p-Toluenesulfonyl chloride commonly used for?
It is primarily used as a sulfonylating agent in organic synthesis, including the preparation of sulfonamides, dyes, and pharmaceutical intermediates.
What is the chemical formula and molecular weight of p-Toluenesulfonyl chloride?
The formula is (CH₃)C₆H₄SO₂Cl, and the molecular weight is 190.65 g/mol.
How should p-Toluenesulfonyl chloride be stored?
Store in a tightly sealed container at ambient temperature, away from moisture and incompatible materials.
What grades or purities of p-Toluenesulfonyl chloride does Molekula supply?
Molekula supplies it at a purity of ≥98.0%, suitable for research and development applications.
Can Molekula supply p-Toluenesulfonyl chloride in bulk quantities?
Yes, Molekula can provide bulk quantities upon request, with minimum order quantities and packaging options tailored to your needs.
What documentation comes with an order of p-Toluenesulfonyl chloride?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a technical data sheet detailing specifications and handling instructions.
Where can I buy p-Toluenesulfonyl chloride?
Directly from Molekula, which lists p-Toluenesulfonyl chloride in 1 kg packs from $145.60 excl. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
Is p-Toluenesulfonyl chloride dangerous goods for shipping?
Yes. p-Toluenesulfonyl chloride ships as dangerous goods: UN3261, class 8, packing group III.
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.