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Industrial Chemicals

P-Toluenesulfonic AcidCH₃C₆H₄SO₃H

Formula: CH₃C₆H₄SO₃HCAS: 104-15-4Mol. Wt: 172.20 g/mol
Product NameP-Toluenesulfonic Acid
SKUVCP-IND-0003
CategoryIndustrial Chemicals
SubcategoryOrganic Acids
OriginIndia
ManufacturerVasudev Chemo Pharma
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Export: 1 MT minimum order  ·  Domestic: 220 kg minimum order

About P-Toluenesulfonic Acid

P-Toluenesulfonic Acid (PTSA) is a strong organic acid widely used as a catalyst in esterification, polymerization, and dehydration reactions. It is preferred over mineral acids due to its milder and more selective reactivity. Vasudev Chemo Pharma supplies PTSA in both monohydrate and anhydrous forms, manufactured under strict quality controls at our Gujarat facility. The product is a versatile acid catalyst for resin synthesis, alkyd coatings, and biodiesel transesterification. PTSA is valued for its non-oxidising nature, ease of handling, and clean reaction profiles compared to sulphuric acid or hydrochloric acid.

Technical Specifications

ParameterValue
Purity≥ 95.0%
Melting Point103 – 106°C (monohydrate)
Moisture≤ 5.0% (monohydrate)
Colour (Hazen)≤ 50
Sulphated Ash≤ 0.1%
Iron (Fe)≤ 10 ppm
pH (10% solution)1.0 – 2.0
Solubility in WaterFreely soluble

Appearance

White crystalline solid

Molecular Weight

172.20 g/mol

HSN Code

29042090

Applications & Industries

Applications

Esterification catalystPolymerisation catalystAlkyd resin manufacturingBiodiesel productionPharmaceutical synthesisDehydration reactionsCrosslinking catalyst for coatings

Target Industries

Paints & CoatingsResins & PolymersPharmaceuticalsBiofuelsAgrochemicalsFine Chemicals

Safety & Compliance

GHS Classification

Safety Class: Corrosive / Irritant

Signal Word: Danger

GHS05GHS07

Hazard Statements

  • ⚠H314 – Causes severe skin burns and eye damage
  • ⚠H335 – May cause respiratory irritation

Packaging Options & Available Grades

Available Grades

  • Industrial Grade
  • Technical Grade
  • Pharmaceutical Grade

Packaging

  • 25 kg HDPE bags
  • 50 kg fibre drums
  • 500 kg jumbo bags
  • Custom packaging on request

Minimum Order Quantity

500 kg

Certifications & Quality Assurance

ISO 9001:2015

Documents & Downloads

Content to add

Downloadable documents — Safety Data Sheet (SDS/MSDS), Certificate of Analysis (COA), Technical Data Sheet (TDS), Product Specification Sheet. Each with file type, access level (public / on-request).

Shipping & Export Information

Content to add

Shipping & export details — Export-ready packaging, nearest ports (Kandla, Mundra, Hazira), shipping lead time, Incoterms offered (FOB, CIF, CFR), countries exported to, customs documentation support, HS code for this product.

Frequently Asked Questions

What is P-Toluenesulfonic Acid (PTSA) used for?+
P-Toluenesulfonic Acid (PTSA, CAS 104-15-4) is a strong organic acid widely used as a catalyst in esterification, polymerisation, and dehydration reactions. Key applications include alkyd resin manufacturing, biodiesel transesterification, pharmaceutical synthesis, coatings crosslinking, and fragrance production. PTSA is preferred over mineral acids like sulphuric acid because of its non-oxidising nature, milder reaction conditions, and cleaner reaction profiles that reduce side-product formation.
What is the difference between PTSA monohydrate and anhydrous PTSA?+
PTSA monohydrate (molecular weight 190.22 g/mol) contains one molecule of water of crystallisation, has a melting point of 103–106°C, and is easier to handle and store. Anhydrous PTSA (molecular weight 172.20 g/mol) has a higher active acid content per gram and is preferred for moisture-sensitive reactions. Vasudev Chemo Pharma supplies both forms in industrial, technical, and pharmaceutical grades with purity ≥ 95%.
Is P-Toluenesulfonic Acid hazardous?+
PTSA is classified as corrosive (GHS05) and irritant (GHS07). It causes severe skin burns and eye damage (H314) and may cause respiratory irritation (H335). It should be handled with chemical-resistant gloves, face protection, and in a well-ventilated area. Despite being a strong acid, PTSA is non-oxidising, which makes it safer to handle than mineral acids like sulphuric or nitric acid. Full safety information is provided in the SDS included with every Vasudev Chemo Pharma shipment.
Can PTSA be used as a catalyst in pharmaceutical manufacturing?+
Yes. PTSA is widely used in pharmaceutical synthesis as an acid catalyst and as a counter-ion for drug salt formation (tosylate salts). Pharmaceutical-grade PTSA from Vasudev Chemo Pharma meets stringent purity specifications (≥ 95%, low heavy metals) suitable for GMP manufacturing environments. It is used in the synthesis of various APIs, drug intermediates, and excipients.
What is the CAS number of P-Toluenesulfonic Acid?+
The CAS (Chemical Abstracts Service) Registry Number of P-Toluenesulfonic Acid is 104-15-4. The molecular formula is CH₃C₆H₄SO₃H with a molecular weight of 172.20 g/mol. The HS code for international trade is 29042090.
What grades of P-Toluenesulfonic Acid are available from Vasudev Chemo Pharma?+
Vasudev Chemo Pharma supplies P-Toluenesulfonic Acid in the following grades: Industrial Grade, Technical Grade, Pharmaceutical Grade. Grade selection depends on your application requirements — contact our technical team for guidance on the best grade for your process.

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