4-Toluene Sulfonic Acid Solution is a liquid form of PTSA, providing easy handling and dosing for chemical and pharmaceutical processes.
D.K. Pharmachem ensures assay consistency, stability, and global supply for industrial and pharma applications.
| Attribute | Details |
|---|---|
| CAS Number | 104-15-4 |
| Molecular Formula | C₇H₈O₃S (aqueous solution) |
| Molecular Weight | 172.20 g/mol |
| Grade | Pharma / Industrial |
| Appearance | Clear to pale yellow solution |
| Assay | ≥98% |
| Packaging | HDPE drums, export ready |

Liquid form enables precise chemical reactions

Precursor in API production

Used in curing and esterification

Easy-to-use sulfonating agent
As a WHO-GMP certified manufacturer, We are equipped for high-purity pharmaceutical intermediate production. Our 4-Toluene Sulfonic Acid Solution manufacturing line is purpose-built for controlled synthesis, ensuring batch-to-batch consistency and compliance with international pharmacopoeial standards.
DK Pharmachem operates a dedicated WHO-GMP certified manufacturing facility in India, equipped for high-purity pharmaceutical intermediate production. Our 4-Toluene Sulfonic Acid Solution manufacturing line is purpose-built for controlled synthesis, ensuring batch-to-batch consistency and compliance with international pharmacopoeial standards.
Facility highlights to list as bullet points below this paragraph:
As a bulk 4-Toluene Sulfonic Acid Solution supplier in India, DK Pharmachem maintains scalable production capacity to meet both regular and high-volume procurement requirements. Our supply chain is designed to support uninterrupted manufacturing operations for our clients.
Supply capabilities to list as bullet points:
Every batch of 4-Toluene Sulfonic Acid Solution manufactured at our India facility is backed by:
As one of the established 4-Toluene Sulfonic Acid Solution manufacturers in India, we ensure uninterrupted supply chains and strict adherence to global quality standards.
DK Pharmachem serves clients across pharmaceuticals, agrochemicals, water treatment, and contract manufacturing sectors. We maintain consistent stock availability to support both spot orders and long-term supply agreements.
As an established 4-Toluene Sulfonic Acid Solution exporter, we ship to regulated markets including Europe, North America, Southeast Asia, and the Middle East. All export shipments are accompanied by full documentation - COA, MSDS, EDMF, and country-specific regulatory filings where required.
Partner with DK Pharmachem for consistent pharmaceutical-grade quality, reliable bulk supply, and comprehensive regulatory documentation. Get in touch with our team today to discuss your requirements, timelines, and pricing.
4-Toluene Sulfonic Acid Solution powder is packed to maintain stability and ensure safe handling throughout the supply chain.
Choosing the right sourcing partner for 4-Toluene Sulfonic Acid Solution means evaluating quality, regulatory standing, supply reliability, and long-term partnership capability. DK Pharmachem has been a trusted name in pharmaceutical intermediates for over four decades, built on a foundation of manufacturing excellence and customer trust.

Direct Manufacturer, Not a Trader

WHO-GMP Certified Manufacturing

EDMF Registration Support

EP/BP Compliant Product Quality

Comprehensive Technical & Export Documentation

Bulk Supply & Long-Term Contract Support
Find answers to common questions about 4-Toluene Sulfonic Acid Solution products and services
4-Toluene Sulfonic Acid Solution, the liquid form of para-toluenesulfonic acid (PTSA), is used as a catalyst and reagent in chemical synthesis, as a precursor in pharmaceutical API production, in the curing and esterification of resins and polymers, and as a sulfonating agent in dye manufacturing. Its liquid format allows for easier handling and more precise dosing compared to solid PTSA in industrial and pharma-grade processes.
DK PharmaChem manufactures 4-Toluene Sulfonic Acid Solution to European Pharmacopoeia (EP) and British Pharmacopoeia (BP) compliance standards. Each batch is produced under controlled synthesis conditions to maintain assay consistency and meet these pharmacopoeial specifications.
Yes. 4-Toluene Sulfonic Acid Solution is manufactured at DK PharmaChem’s dedicated World Health Organization Good Manufacturing Practices (WHO-GMP) certified facility in India, which is equipped for high-purity pharmaceutical intermediate production. The facility includes an in-house High-Performance Liquid Chromatography (HPLC) and analytical quality control laboratory to support batch-to-batch consistency.
DK PharmaChem provides a Certificate of Analysis (CoA) with every batch, a Material Safety Data Sheet (MSDS) on request, and European Drug Master File (EDMF) registration support for this product. Export shipments are also accompanied by country-specific regulatory filings where required.
The CAS number for 4-Toluene Sulfonic Acid Solution is 104-15-4. The molecular formula is C7H8O3S in aqueous solution, with a molecular weight of 172.20 g/mol.
4-Toluene Sulfonic Acid Solution is packed in HDPE drums and fiber drums with inner liners, with bulk packaging options available for larger orders. Packaging is export-ready and designed to maintain product stability during transit and storage.
International buyers can request a quote or samples by contacting DK PharmaChem’s team through the enquiry form on the website or by emailing dkc@dkpharmachem.com. The team will discuss requirements, timelines, and pricing directly with the buyer.
DK PharmaChem exports 4-Toluene Sulfonic Acid Solution to regulated markets across the world. All export shipments include full documentation such as CoA, MSDS, EDMF, and country-specific regulatory filings where required.