We provide specialized winterization services to safeguard your pool during the off-season, and when spring arrives, we handle the thorough opening process.
Welcome to the World of Sulfonation
We provide specialized winterization services to safeguard your pool during the off-season, and when spring arrives, we handle the thorough opening process.
Welcome to the World of Sulfonation
Xylene Sulfonic Acid (XSA) is an aromatic sulphonic acid supplied by AAOL as AROCAT-XSA70, a concentrated liquid grade developed for industrial acid-catalyzed applications.
XSA is used where strong organic acidity, liquid-phase handling and controlled catalytic performance are required. It is particularly relevant in resin-catalyst systems, foundry and casting applications, organic synthesis and specialty chemical processing.
AAOL supplies XSA for industrial customers requiring defined product specifications, batch documentation and dependable bulk supply.
Product
AROCAT-XSA70
CONTENT
NLT 70%
FREE SULFURIC ACID
NMT 2%
ACID VALUE
NLT 220 mg KOH/g
APPEARANCE
Yellow to Dark Brown Solution
HAZARD
Corrosive
Corrosive
AROCAT-XSA70
25231-41-9*
Liquid
✓ Concentrated xylene sulphonic acid solution
✓ Strong organic acid catalyst
✓ Suitable for resin-catalyst systems
✓ Water-soluble liquid grade
✓ Industrial chemical processing
✓ Bulk supply capability
Xylene Sulfonic Acid is a strong aromatic sulphonic acid used primarily where controlled acid catalysis is required in industrial chemical processes.
AAOL’s AROCAT-XSA70 is supplied as a concentrated liquid solution and is particularly relevant to resin curing, foundry and casting systems, specialty chemical processing and selected organic synthesis applications.
Unlike generic discussions of xylene sulfonate salts, this page relates specifically to Xylene Sulfonic Acid solution. Sodium xylene sulfonate and other neutralized xylene sulfonates are separate products commonly associated with hydrotropic formulations.
For industrial procurement, XSA should be evaluated on parameters including active acid content, free sulfuric acid, acid value, specific gravity, colour, storage requirements and batch consistency.
Verified Research Batch
Xylene Sulfonic Acid
AROCAT-XSA70
XSA / XSA70
Yellow to dark brown solution
NLT 70%
NMT 2%
NLT 220 mg KOH/g
1.220 ± 0.020*
Liquid
Amber / brown
<1
Approx. 1.3
Soluble
Aromatic sulphonic acid
Corrosive
Every production batch undergoes rigorous analytical verification to ensure compliance with internal quality specifications and customer requirements. Testing protocols support product consistency, catalytic performance, purity verification, and manufacturing reliability.
Xylene Sulfonic Acid is used as an acid catalyst in selected resin systems for foundry and casting applications.
Its strong acidity can support the curing of compatible acid-catalyzed resin binders where controlled catalyst addition is required.
Key Benefits
✓ Strong acid-catalyst functionality
✓ Suitable for selected resin-curing systems
✓ Liquid form supports practical dosing
XSA can be used in selected acid-catalyzed resin and polymer processes where controlled acidity is required to promote curing or condensation chemistry.
Actual catalyst loading and process conditions should be established according to the specific resin system.
Key Benefits
✓ Supports acid-catalyzed resin chemistry
✓ Suitable for industrial liquid dosing
✓ Defined active-acid specification
AROCAT-XSA70 can serve as a strong organic acid catalyst in suitable manufacturing processes.
Its use should be evaluated according to reaction chemistry, process temperature, equipment compatibility and downstream purification requirements.
Key Benefits
✓ Strong Brønsted acidity
✓ Liquid-phase process compatibility
✓ Suitable for selected industrial reactions
Xylene Sulfonic Acid may be used in selected organic reactions where strong acid catalysis is required.
Potential applications depend on the substrate and process and may include acid-catalyzed transformations such as condensation or related synthetic chemistry.
Key Benefits
✓ Strong organic acidity
✓ Useful process reagent
✓ Suitable for reaction-development evaluation
XSA can be used as a catalyst, process acid or intermediate in selected specialty chemical manufacturing routes.
Its suitability depends on the reaction pathway, required impurity profile and downstream processing.
Key Benefits
✓ Versatile process-acid functionality
✓ Industrial-scale supply formats
✓ Supports batch-controlled manufacturing
Xylene sulphonic chemistry is closely associated with hydrotropes, particularly xylene sulfonate salts such as sodium xylene sulfonate.
XSA can therefore be relevant as an acid-form material or intermediate in processes involving neutralized xylene sulfonate chemistry.
The acid and its salts should not, however, be treated as identical products: formulation properties, pH, safety and application requirements differ substantially.
Key Benefits
✓ Relevant to xylene sulfonate chemistry
✓ Useful precursor/intermediate context
✓ Supports hydrotrope-related manufacturing routes
AROCAT-XSA70 is a corrosive industrial chemical and should be handled using established chemical-safety practices.
The product may be corrosive to metals and can cause severe skin burns and serious eye damage. Exposure may also cause an allergic skin reaction or respiratory irritation.
Avoid direct contact with the skin and eyes and minimise inhalation exposure.
Use appropriate:
● protective gloves
● protective clothing
● chemical splash goggles or face protection
● suitable respiratory protection where required
● local and general ventilation
● Eye Contact
Immediately rinse cautiously with plenty of water for at least 15 minutes. Remove contact lenses where easy to do and obtain medical attention.
● Skin Contact
Remove contaminated clothing and rinse affected skin immediately with plenty of water for at least 15 minutes. Chemical burns require medical attention.
● Inhalation
Move the affected person to fresh air and keep them at rest in a position comfortable for breathing. Obtain medical attention if symptoms occur.
● Ingestion
Rinse the mouth thoroughly. Do not induce vomiting. Obtain medical attention.
Avoid uncontrolled discharge into drains or the aquatic environment.
Spillage should be contained and collected using suitable procedures while wearing appropriate protective equipment.
Waste and contaminated packaging should be handled in accordance with applicable regulations and the current SDS.
Store in a cool, well-ventilated place away from excessive heat, incompatible materials and direct sunlight.
Keep containers upright and protect them from physical damage.
Keep containers tightly closed when not in use.
Store only in suitable chemical-resistant packaging and prevent contamination during storage and transfer.
AROCAT-XSA70 is stable under recommended storage conditions.
Avoid exposure to high temperatures and incompatible reactive materials.
Use corrosion-resistant containers with a suitable resistant inner liner.
The current SDS identifies mild steel, stainless steel and aluminium as incompatible materials and states that XSA may be corrosive to metals.
Packaging and transfer equipment should therefore be selected according to the current SDS and plant-specific compatibility review.
Need custom documentation or batch-specific analysis?
AROCAT-XSA70 is supplied against defined commercial parameters, helping procurement and production teams evaluate product suitability for repeat industrial use.
Free sulfuric acid is an important process parameter because it can influence acidity, corrosion behaviour and downstream reaction performance.
Bulk packaging options support laboratory-to-production procurement requirements and recurring industrial consumption.
Relevant documentation can support qualification by:
● procurement
● production
● QA/QC
● technical teams
● EHS personnel
Industrial users evaluating a Xylene Sulfonic Acid manufacturer or supplier need more than a product name.
A useful product specification should clearly communicate active XSA concentration, free sulfuric acid, acid value, physical appearance, density, handling requirements, storage conditions, packaging, safety documentation and batch-specific quality information.
AAOL’s XSA product information is intended to support technical evaluation as well as procurement decisions.
Defined XSA concentration, free acid and acid-value parameters.
SDS, COA and technical specification support.
Suitable for procurement, QA and production review.
Corrosive-liquid handling requirements clearly identified.
Drum, IBC and bulk logistics options.
Designed for industrial catalytic and specialty chemical processes.
XSA combines the strong acidity of an aromatic sulphonic acid with the handling characteristics of a concentrated liquid product.
This makes it useful in selected industrial processes where manufacturers require:
● rapid acid availability
● liquid catalyst dosing
● controlled active concentration
● compatibility with resin or reaction systems
● reproducible procurement specifications
The correct catalyst concentration should always be established for the specific process rather than assuming that higher acidity automatically produces better performance.
✓ Strong aromatic sulphonic acid
✓ Supplied as a concentrated liquid solution
✓ NLT 70% Xylene Sulfonic Acid
✓ NMT 2% free sulfuric acid
✓ Acid value NLT 220 mg KOH/g
✓ Amber to brown liquid appearance
✓ pH below 1
✓ Water-soluble
✓ Corrosive industrial chemical
✓ Suitable for selected resin and catalytic applications
Xylene Sulfonic Acid (XSA) is an aromatic sulphonic acid used primarily as a strong acid catalyst and process chemical in selected industrial applications.
AAOL supplies it as AROCAT-XSA70, a concentrated liquid grade containing at least 70% Xylene Sulfonic Acid.
AAOL’s current AROCAT-XSA70 MSDS identifies CAS 25231-41-9 in the document header.
This should be confirmed against the latest approved TDS before the redesigned product page is published.
Do not use CAS 1300-72-7 for this product page, because that number is commonly associated with sodium xylene sulfonate.
Key commercial specifications for AAOL’s current XSA product include:
● Xylene Sulfonic Acid: NLT 70%
● Free Sulfuric Acid: NMT 2%
● Acid Value: NLT 220 mg KOH/g
● Appearance: yellow to dark brown solution
Final values should always be checked against the current TDS and batch COA.
XSA is used primarily in selected industrial processes such as:
● foundry resin-catalyst systems
● casting resin systems
● resin and polymer processing
● industrial acid catalysis
● organic synthesis
● specialty chemical manufacturing
The exact use and catalyst loading depend on the process.
Xylene sulphonic chemistry is associated with hydrotropic applications, but the distinction between Xylene Sulfonic Acid and neutralized xylene sulfonate salts is important.
Sodium xylene sulfonate is a well-known commercial hydrotrope, while XSA is the acidic form and has substantially different pH, handling and process characteristics.
Yes.
AROCAT-XSA70 is classified as corrosive and may cause severe skin burns and serious eye damage. Appropriate PPE, ventilation and chemical-resistant handling systems are required.
Yes. The supplied XSA solution is water-soluble and is handled as a liquid industrial chemical.
AAOL’s current product page lists:
● 240 kg HDPE barrels
● 1200 kg IBC
● ISO tanks
Availability should be confirmed when requesting a quotation.
AAOL supplies AROCAT-XSA70 Xylene Sulfonic Acid for industrial catalytic, resin, foundry and specialty chemical applications.
If you are evaluating a Xylene Sulfonic Acid manufacturer, Xylene Sulfonic Acid supplier or Xylene Sulfonic Acid bulk supplier, share your technical and commercial requirements with the AAOL team.
We can support discussions around:
✓ XSA specifications
✓ active acid content
✓ free sulfuric acid requirements
✓ COA / SDS / TDS documentation
✓ packaging
✓ industrial quantities
✓ recurring supply
✓ application requirements
✓ bulk logistics
