p-Toluenesulfonic acid monohydrate
p-Toluenesulfonic acid monohydrate (CAS 6192-52-5), molecular formula CH3C6H4SO3H · H2O, is a high-purity chemical supplied by Tech Serve Solutions for acids & bases applications, to pharmacopoeia specification (USP, BP, EP). Every batch is tested and ships with a Certificate of Analysis; MSDS and technical data sheets are available on request. Tech Serve Solutions has supplied laboratory reagents, fine chemicals and pharmaceutical intermediates worldwide since 1998.
- IUPAC
- Benzenesulfonic acid, 4-methyl-, monohydrate (9CI) p-Toluenesulfonic acid, monohydrate (8CI) 4-Methylbenzenesulfonic acid monohydrate 4-Toluenesulfonic acid monohydrate Tosic acid monohydrate
- Synonyms
- Benzenesulfonic acid4-methyl-monohydrate (9CI) p-Toluenesulfonic acidmonohydrate (8CI) 4-Methylbenzenesulfonic acid monohydrate 4-Toluenesulfonic acid monohydrate Tosic acid monohydrate

| Molecular weight | 190.22 |
|---|---|
| Linear formula | CH3C6H4SO3H · H2O |
| Assay | ≥98.5% |
| Vapour density | 5.9 (vs air) |
| Impurities tested | 9.5-11.5% water |
| Melting point | 103-106 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 2585 8/PG 3 |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26 |
| Cation traces | Fe: ≤0.01%Na: ≤0.002%heavy metals (as Pb): ≤0.001% |
| Anion traces | sulfate (SO42-): ≤0.3% |
| Ignition residue | ≤0.1% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Clarity Of Soln | passes test |
|---|
Documentation
Supplied to USP, BP and EP standards. Every batch ships with a Certificate of Analysis (assay, identity, purity); MSDS and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is p-Toluenesulfonic acid monohydrate?
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p-Toluenesulfonic acid monohydrate (CAS 6192-52-5), molecular formula CH3C6H4SO3H · H2O, is a high-purity chemical supplied by Tech Serve Solutions for acids & bases applications, to USP, BP and EP standards.
What grades of p-Toluenesulfonic acid monohydrate does Tech Serve Solutions supply?
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Tech Serve Solutions supplies p-Toluenesulfonic acid monohydrate in USP, BP, EP and reagent/AR grades. Custom specifications for nutraceutical or specialty pharmaceutical applications are available — contact our technical sales team.
What is the CAS number and molecular formula of p-Toluenesulfonic acid monohydrate?
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p-Toluenesulfonic acid monohydrate has CAS number 6192-52-5 and molecular formula CH3C6H4SO3H · H2O. Full specifications appear in the table above and in the Certificate of Analysis.
What is the typical minimum order quantity and lead time for p-Toluenesulfonic acid monohydrate?
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Sample quantities are available for technical evaluation; bulk MOQ depends on grade and packaging. In-stock material typically ships in 7–10 working days; custom-spec orders take 3–4 weeks. Tech Serve Solutions ships worldwide with full export documentation.
Do you provide a Certificate of Analysis (CoA) with each shipment?
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Yes. Every batch of p-Toluenesulfonic acid monohydrate ships with a Certificate of Analysis covering assay, identity and purity tests, plus pharmacopoeia conformance where applicable. MSDS and TDS documents are available on request before order placement.
How should p-Toluenesulfonic acid monohydrate be stored?
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Store p-Toluenesulfonic acid monohydrate in its original sealed container in a cool, dry place away from direct sunlight and incompatible materials, in line with the storage guidance on the Safety Data Sheet. Reseal between dispensings.
What is p-Toluenesulfonic acid monohydrate used for?
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p-Toluenesulfonic acid monohydrate is used in acids & bases applications across pharmaceutical, research and industrial settings. Our technical team can advise on suitability for your specific process.
How do I request a quote for p-Toluenesulfonic acid monohydrate?
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Request a quote with your required grade, quantity and destination via https://www.techservesolutions.in/contact or email info@techservesolutions.in. We respond with specifications, a Certificate of Analysis and pricing.
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