5-Sulfoisophthalic acid monolithium salt
5-Sulfoisophthalic acid monolithium salt (CAS: 46728-75-0; Formula: LiO3SC6H3-1,3-(CO2H)2) is a unique organic compound with a molecular weight of 252.13. It functions primarily as a monomer in the synthesis of water-dispersible polyesters. Its structure, incorporating both sulfonic acid and carboxylic acid functionalities, imparts specific properties to the resulting polymers, making it a valuable component in materials science and polymer development.
- Synonyms
- 3-(Dicarboxy)benzenesulfonic acid monolithium salt5-Sulfoisophthalic acid, monolithium salt

Monomer for Water-Dispersible Polyesters
This compound serves as a key monomer in the production of polyesters designed to be dispersible in water. The presence of the sulfonate group enhances hydrophilicity and aids in creating stable aqueous dispersions of the polymer.
Polymer Science Applications
Utilised in polymer science, its distinct chemical structure allows for the modification of polymer properties, contributing to the development of advanced materials with tailored characteristics for various industrial applications.
Materials Science Component
As a component in materials science, 5-Sulfoisophthalic acid monolithium salt is instrumental in designing novel polymeric materials. It can influence properties such as solubility, adhesion, and thermal stability in the final polymer matrix.
| Molecular weight | 252.13 |
|---|---|
| Linear formula | LiO3SC6H3-1,3-(CO2H)2 |
| Impurities tested | <10% water |
| Application | Monomer for water-dispersible polyesters. |
| Melting point | >300 °C(lit.) |

Hazard statements
- H318Causes serious eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 41 |
| Safety statements (S) | 26-36 |
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 5-Sulfoisophthalic acid monolithium salt used for?
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5-Sulfoisophthalic acid monolithium salt is primarily used as a monomer for synthesizing water-dispersible polyesters and in broader polymer and materials science applications.
What is the CAS number and formula for 5-Sulfoisophthalic acid monolithium salt?
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The CAS number is 46728-75-0 and the chemical formula is LiO3SC6H3-1,3-(CO2H)2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 5-Sulfoisophthalic acid monolithium salt with less than 10% water content. TSS does not represent this product as USP, BP, or EP grade; it is suitable for research and technical applications.
How should 5-Sulfoisophthalic acid monolithium salt be handled?
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This compound is classified as Danger, causing serious eye damage (H318). Handle with appropriate personal protective equipment, including Eyeshields, Gloves, and a dust mask type N95 (US). Ensure proper ventilation and avoid dust formation.
Is 5-Sulfoisophthalic acid monolithium salt available for export?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including 5-Sulfoisophthalic acid monolithium salt.
How can I request a sample or quote for 5-Sulfoisophthalic acid monolithium salt?
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To request a sample or a quote, please contact our sales team through the website or by calling our customer service line.
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