Industrial, Food & Pharmaceutical Grade p-Toluenesulfonic Acid (PTSA) CAS 104-15-4 4-Methylbenzenesulfonic Acid Catalyst, Synthetic Intermediate & Det

p-Toluenesulfonic Acid (Abbr: PTSA, CAS:104-15-4,EINECS:203-180-0, HS Code:2904100000) is a strong organic acid in white crystalline flake or powder form. It is highly soluble in water, alcohol and other organic solvents, with stable chemical properties and strong catalytic activity. We supply industrial, food and laboratory reagent grades complying with national and international standards. Widely used as acid catalyst, pH regulator, esterification agent and industrial cleaning agent across multiple sectors.

Applications
Organic Synthesis (Core Application)
It acts as high-efficiency acid catalyst for esterification, condensation, dehydration and alkylation reactions. Replaces traditional inorganic acids for milder reaction conditions, fewer side reactions and higher product yield, widely applied in fine chemical and pharmaceutical synthesis.
Resin & Coating Industry
Used as curing accelerator and catalyst for amino resin, phenolic resin and epoxy resin. It shortens curing time, improves film hardness, gloss and adhesion, commonly used in paints, inks and adhesive formulations.
Cleaning & Descaling
Serves as professional descaling agent and metal surface treatment agent. Effectively removes limescale, rust and oil stains on pipelines, boilers and metal workpieces, with low corrosion to metal substrates.
Food Industry
Food grade PTSA works as acidity regulator and processing auxiliary in food manufacturing, strictly complying with food safety specifications for food processing and preservative production.
Textile & Daily Chemicals
Applied as pH adjuster and dyeing auxiliary in textile printing and dyeing. Also used in detergent, personal care products to stabilize formula and regulate acidity.
Laboratory & Other Fields
Standard analytical reagent for chemical testing and laboratory experiments. It is also used in electroplating, leather processing and plastic manufacturing as functional auxiliary.

Product Advantages
✅ Multi-grade options: Industrial, food and reagent grades to meet diverse usage demands
✅ Strong catalytic performance: High activity, low dosage and obvious cost-saving effect
✅ Low corrosion: Milder than inorganic strong acids, less damage to equipment
✅ Good solubility: Dissolves fast in water and organic solvents for easy batching
✅ Stable quality: Uniform composition, stable performance during storage and use
✅ Complete documents: COA, MSDS and relevant certificates available for export

Packaging & Storage
Standard packaging: 25kg woven bags with inner PE liner or sealed fiber drums; 1000kg FIBC bulk bags for large orders. Food and reagent grades adopt dedicated sealed packages. The product is hygroscopic. Store in cool, dry and well-ventilated warehouse. Keep containers tightly sealed, away from alkalis, oxidants and flammable substances. Shelf life is 24 months under proper storage.

Safety Information
Classified as corrosive substance (UN 2585, Class 8) for transportation. It is strongly acidic and corrosive to skin, eyes and respiratory tract. Wear chemical-resistant gloves, goggles and dust mask during handling. In case of contact, rinse thoroughly with plenty of clean water immediately and seek medical help if irritation persists. Complete MSDS and qualification certificates are available on request.

1. 1.A 70,000 ㎡ warehouse (20,000 MT capacity) with moisture-proof and temperature-controlled systems, enabling efficient fulfillment of large-volume orders.
2. 2.Free samples (Ship within 3-7 days) to let you test products at zero trial cost.
3. 3.Transparent lead time for hazardous chemicals: 45–60 days, with clear delivery schedules.
4. 4.Certified with a Hazardous Chemical Business License and ISO certification, ensuring smooth customs clearance.
5. 5.6 packaging options with customizable logos to minimize product loss during transportation.
6. 6.Over 400 chemical SKUs available for one-stop procurement, helping you reduce sourcing costs.