4-Sulfophthalic acid solution
4-Sulfophthalic acid solution (CAS: 89-08-7), with the molecular formula C6H4O5S, is supplied by Tech Serve Solutions as a technical grade solution at 50 wt. % in water. This compound is a derivative of phthalic acid, featuring a sulfonic acid group. Its primary utility lies in its role as a monomer in polymer science and materials science, contributing to the synthesis of various specialized polymers and materials.
- Synonyms
- 4-Sulphophthalic acid4-Sulfophthalic acid1,2-(HOOC)2C6H3SO3H

Polymer Synthesis
4-Sulfophthalic acid acts as a functional monomer in the production of polymers. Its incorporation can impart specific properties, such as improved solubility or ion-exchange capabilities, to the resulting polymer chains.
Materials Science Research
This compound serves as a building block in materials science for the development of novel materials. It can be utilized in the synthesis of functionalized resins or coatings requiring specific chemical characteristics.
Chemical Intermediate
As a sulfonate derivative of phthalic acid, it can function as an intermediate in various organic synthesis pathways where the introduction of both carboxyl and sulfonic acid functionalities is desired.
| Molecular weight | 246.19 |
|---|---|
| Linear formula | HO3SC6H3-1,2-(CO2H)2 |
| Grade | technical grade |
| Density | 1.292 g/mL at 25 °C |
| Refractive index | n20/D 1.447 |
| Concentration | 50 wt. % in H2O |

Hazard statements
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Transport (UN / ADR) | UN 3265 8 / PGIII |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| Safety statements (S) | 26-36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 4-Sulfophthalic acid solution used for?
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4-Sulfophthalic acid solution (CAS: 89-08-7) is primarily used as a monomer in polymer science and materials science for the synthesis of specialized polymers and materials. It can also serve as a chemical intermediate in organic synthesis.
What are the CAS number and formula for 4-Sulfophthalic acid solution?
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The CAS number for 4-Sulfophthalic acid solution is 89-08-7. Its linear formula is HO₃SC₆H₃-1,2-(CO₂H)₂, and its molecular weight is 246.19 g/mol.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Sulfophthalic acid solution at technical grade, as a 50 wt. % solution in water. We do not represent this product as meeting USP, BP, or EP pharmacopoeial standards.
How should 4-Sulfophthalic acid solution be handled safely?
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4-Sulfophthalic acid solution is classified as a Danger hazard (GHS05) and causes severe skin burns and eye damage (H314). Handle with appropriate personal protective equipment, including gloves, eye protection, and protective clothing. Ensure adequate ventilation and refer to the Safety Data Sheet for detailed handling instructions.
How is 4-Sulfophthalic acid solution typically packed and shipped?
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4-Sulfophthalic acid solution is shipped according to UN 3265, Class 8, Packing Group III regulations for corrosive liquid acidic organic substances, n.o.s. Specific packing configurations are available upon request for domestic and international export.
How can I request a sample or quote for 4-Sulfophthalic acid solution?
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To request a sample or a quotation for 4-Sulfophthalic acid solution, please contact the Tech Serve Solutions sales department with your specific requirements.
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