5-Sulphoisophthalic Acid | 22326-31-4

Description :

5-Sulphoisophthalic Acid Supplier & Distributor in India

ChemicalBull is a reliable 5-Sulphoisophthalic Acid supplier, distributor and exporter in India for sulfonated polyester resins, water-dispersible polymers, speciality coatings, adhesives, textile polymers and functional-material manufacturing.

5-Sulphoisophthalic Acid, also spelled 5-Sulfoisophthalic Acid, is a sulfonated aromatic dicarboxylic acid with the formula C₈H₆O₇S and CAS Number 22326-31-4. It is also known as 5-Sulfo-1,3-benzenedicarboxylic Acid and is commonly abbreviated as SIPA.

Buyers comparing 5-Sulphoisophthalic Acid manufacturers and suppliers can contact ChemicalBull for assay, moisture, acid value, colour, impurity limits, COA, TDS, MSDS/SDS, packing, availability and commercial pricing.

Need 5-Sulphoisophthalic Acid for polyester modification, water-dispersible resins or speciality polymer manufacturing? Share your required specification, quantity, packing and destination to receive current availability and pricing.

Quick Answer

5-Sulphoisophthalic Acid is a functional aromatic monomer and chemical intermediate used to introduce sulfonic-acid functionality into selected polyesters, polyurethanes and speciality polymers.

It can support water dispersibility, ionic character, substrate affinity and dye interaction. Buyers must confirm whether they require the free acid, a sodium salt or an ester derivative.

Overview of 5-Sulphoisophthalic Acid

5-Sulphoisophthalic Acid contains two carboxylic-acid groups and one sulfonic-acid group attached to an aromatic ring. This combination allows it to participate in polyesterification and other compatible polymer-forming reactions.

When incorporated into a polymer backbone at a suitable level, the sulfonic functionality can increase polarity and provide ionic sites. These properties are useful in the manufacture of water-dispersible polyesters, dyeable polymers, coatings and speciality adhesive systems.

The free-acid form should not be confused with 5-Sulphoisophthalic Acid Monosodium Salt, its disodium salt, lithium salt or dimethyl ester. These products differ in molecular weight, acidity, solubility and processing behaviour.

Commercial performance depends on assay, moisture, acid value, colour, insoluble matter and related organic impurities. Polymer manufacturers should evaluate reaction time, viscosity, colour development and finished-resin properties before changing the grade or supplier.

Applications of 5-Sulphoisophthalic Acid

Sulfonated Polyester Resin Manufacturing

Polyester-resin manufacturers use 5-Sulphoisophthalic Acid as a functional comonomer in selected sulfonated polyester systems.

Its carboxylic-acid groups can participate in polyester formation, while the sulfonic-acid group introduces additional polarity and ionic functionality.

The required addition level depends on the target molecular weight, acid value, water dispersibility, viscosity and finished-polymer performance.

Water-Dispersible Polyester Resins

5-Sulphoisophthalic Acid may be used to produce polyester resins designed for dispersion or solubility in water after suitable neutralisation or formulation.

These resins can be used in selected coatings, textile treatments, inks, primers and adhesive systems where reduced dependence on conventional organic solvents is required.

Resin manufacturers should evaluate dispersion stability, particle size, pH response, film formation and compatibility with pigments or additives.

Dyeable Polyester and Textile Polymers

Polyester and fibre manufacturers may use sulfoisophthalic functionality to introduce ionic sites into selected polymer chains.

These ionic sites can improve interaction with suitable cationic dyes and support the production of speciality dyeable polyester materials.

The free acid, sodium salt and ester derivatives may provide different processing behaviour. Buyers should use the exact monomer form approved for their polymerisation process.

Coatings and Printing-Ink Binders

Coating and printing-ink manufacturers use sulfonated polyester resins in selected water-dispersible or high-polarity binder systems.

5-Sulphoisophthalic Acid can provide the required functional groups during resin manufacturing. Its effect depends on monomer ratio, neutralisation, molecular weight and the other acids and glycols used in the formulation.

Finished binders should be tested for adhesion, gloss, pigment compatibility, water resistance and storage stability.

Adhesive and Lamination Resins

Adhesive manufacturers may use 5-Sulphoisophthalic Acid in selected polyester or polyurethane intermediates requiring controlled polarity and substrate affinity.

Sulfonic functionality can influence wetting, adhesion, water compatibility and the interaction of the polymer with polar surfaces.

The correct dosage and chemical form should be established through application testing with the actual substrates and curing conditions.

Polyurethane and Functional Polymer Systems

5-Sulphoisophthalic Acid or its approved derivatives may be used as functional intermediates in selected polyurethane and speciality-polymer manufacturing processes.

The introduced ionic groups can support dispersion in water and influence polymer morphology, viscosity and surface interaction.

Process compatibility depends on the reaction route, neutralising agent, moisture level and required finished-polymer properties.

Speciality Polymer and Chemical Intermediates

Speciality chemical companies use 5-Sulphoisophthalic Acid as an aromatic building block for ionomers, functional polyesters and other sulfonated intermediates.

Its combination of carboxylic and sulfonic functionality makes it suitable for controlled chemical modification and multi-stage synthesis.

Manufacturers should confirm conversion, residual acidity, colour and downstream purification before scaling the process.

Why Industrial Buyers Source 5-Sulphoisophthalic Acid from ChemicalBull

Selecting the correct product form is critical. The free acid, monosodium salt, disodium salt and dimethyl ester are not interchangeable on an equal-weight basis and can behave differently during polymerisation.

ChemicalBull assists procurement and technical teams with product-identity confirmation, specification matching, batch-specific COA, TDS, MSDS/SDS, packing information and commercial documentation.

We support polyester-resin manufacturers, textile-polymer companies, coating formulators, printing-ink producers, adhesive manufacturers, polyurethane companies and speciality chemical processors.

Buyers can share their required chemical form, assay, moisture, acid value, colour limit, application, quantity, packing and destination to receive a specification-matched commercial offer.

Buy 5-Sulphoisophthalic Acid

ChemicalBull supplies 5-Sulphoisophthalic Acid for sulfonated polyesters, water-dispersible resins, textile polymers, coatings, adhesives and speciality chemical manufacturing.

For accurate product matching, provide:

• Required free-acid or salt form

• Minimum assay

• Maximum moisture

• Required acid value

• Acceptable colour

• Controlled impurity limits

• End-use application

• Trial or recurring quantity

• Preferred packing

• Delivery destination

• Documentation requirements

Discuss Your 5-Sulphoisophthalic Acid Requirement and Get a Quote

Our team will confirm the available product form, specification, batch documentation, packing options, expected lead time and commercial pricing.

Related Products

• 5-Sulphoisophthalic Acid Monosodium Salt

• Dimethyl 5-Sulfoisophthalate Sodium Salt

• Isophthalic Acid

• Dimethyl Isophthalate
  
  
  

Frequently Asked Questions

1. What is 5-Sulphoisophthalic Acid used for?

   It is used as a functional monomer or intermediate in sulfonated polyesters, water-dispersible resins, dyeable textile polymers, coatings, adhesives and speciality polymers.
   
   

2. Is 5-Sulphoisophthalic Acid the same as its monosodium salt?

   No. The free acid and monosodium salt differ in composition, molecular weight, acidity and processing behaviour. Buyers should specify the exact form required by their formulation.
   
   

3. How does 5-Sulphoisophthalic Acid modify polyester?

   It introduces sulfonic functionality into the polymer structure, which can increase polarity, provide ionic sites and support water dispersibility or interaction with suitable dyes.
   
   

4. What should buyers confirm before ordering?

   Buyers should confirm chemical form, assay, moisture, acid value, colour, insoluble matter, impurity limits, packing and batch documentation.
   
   

5. Where can I buy 5-Sulphoisophthalic Acid?

   ChemicalBull supplies 5-Sulphoisophthalic Acid for industrial B2B requirements. Share your required form, specification, quantity, packing and destination to request availability and pricing.

ChemicalBull supplies 5-Sulphoisophthalic Acid across India, serving customers in Andhra Pradesh, Arunachal Pradesh, Assam, Bihar, Chhattisgarh, Goa, Gujarat, Haryana, Himachal Pradesh, Jharkhand, Karnataka, Kerala, Madhya Pradesh, Maharashtra, Manipur, Meghalaya, Mizoram, Nagaland, Odisha, Punjab, Rajasthan, Sikkim, Tamil Nadu, Telangana, Tripura, Uttar Pradesh, Uttarakhand, and West Bengal, as well as the Union Territories of Andaman & Nicobar Islands, Chandigarh, Dadra & Nagar Haveli and Daman & Diu, Delhi, Jammu & Kashmir, Ladakh, Lakshadweep, and Puducherry. We serve pharmaceutical, chemical, research, academic, laboratory, manufacturing, and industrial customers with reliable nationwide delivery.