Molekula
Pyridinium p-toluenesulfonate [PPTS]
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
Pyridinium *p*-toluenesulfonate (PPTS) is a mild acid catalyst widely used in organic synthesis for acetalization, esterification, and dehydration reactions. It is a solid, thermally stable reagent that avoids the harsh conditions of stronger acids while maintaining high yields. This chemical has a CAS number of 24057-28-1, with the molecular formula C12H13NO3S and a molecular weight of 251.30 g/mol. It is stored at ambient conditions and carries a signal word of *Warning* for safety. Molekula supplies PPTS 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 | White Powder |
| Assay | ≥99% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90034649 |
| CAS Number | 24057-28-1 |
| IUPAC Name | 4-methylbenzenesulfonate;pyridin-1-ium |
| EC Number | 246-002-7 |
| Molecular Formula | C12H13NO3S |
| Molecular Weight | 251.30 |
| Exact Mass | 251.0616 |
| SMILES | CC1=CC=C(C=C1)S(=O)(=O)[O-].C1=CC=[NH+]C=C1 |
| InChIKey | ZDYVRSLAEXCVBX-UHFFFAOYSA-N |
| InChI | InChI=1S/C7H8O3S.C5H5N/c1-6-2-4-7(5-3-6)11(8,9)10;1-2-4-6-5-3-1/h2-5H,1H3,(H,8,9,10);1-5H |
| PubChem CID | 466102 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2933310000 |
| Tariff Code | 2933310000 |
Safety & GHS
-
Health Hazard
GHS07
-
Serious Health Hazard
GHS08
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
- H373 May cause damage to organs through prolonged or repeated exposure
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+330 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting
- P302+352 IF ON SKIN: Wash with soap and water
- 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, English (US), 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
- Benzenesulfonic acid, 4methyl, compd. with pyridine (1:1)
- PPTS
- pToluenesulfonic acid pyridine salt
- pToluenesulfonic acid, pyridine adduct
- Pyridin-1-ium 4-methylbenzenesulfonate
- Pyridine ptoluenesulfonate
- Pyridine, 4methylbenzenesulfonate
- Pyridinium 4-toluenesulfonate
- Pyridinium p-toluenesulfonate
- Pyridinium toluene4sulphonate
Frequently asked questions
What is Pyridinium p-toluenesulfonate (PPTS) commonly used for?
PPTS is primarily used as a mild and efficient acid catalyst in organic synthesis, particularly for acetalization, esterification, and dehydration reactions.
What is the chemical formula and molecular weight of PPTS?
The chemical formula is **C₁₂H₁₃NO₃S**, and the molecular weight is **251.30 g/mol**.
How should PPTS be stored?
Store PPTS at **ambient temperature** in a cool, dry place, away from incompatible substances like strong oxidizers.
What grades or purities of PPTS does Molekula supply?
Molekula supplies **reagent-grade PPTS** with high purity for laboratory and industrial applications.
Can Molekula supply PPTS in bulk quantities?
Yes, Molekula can provide PPTS in bulk, with quantities tailored to meet your specific requirements.
What documentation comes with an order of PPTS?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and batch-specific documentation for traceability.
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.