Molekula
5-Sulfoisophthalic acid
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
5-Sulfoisophthalic acid is an organic sulfonic acid widely used as a key intermediate in the synthesis of dyes, surfactants, and high-performance polymers, including polyesters and polyamides. It is a versatile building block for specialty chemicals requiring water solubility and thermal stability. This compound has a CAS number of 22326-31-4, a molecular formula of C6H3(COOH)2SO3H, and a molecular weight of 246.19. It must be stored between 2 to 8°C and carries a **Danger** signal word due to its hazardous properties. Molekula supplies 5-Sulfoisophthalic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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Specifications
| Property | Value |
|---|---|
| Appearance | White to off-white powder |
| Purity | >97% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 258 °C |
Source: PubChem CID 80714 (Human Metabolome Database (HMDB))
Identification
| Property | Value |
|---|---|
| SKU | 38586502 |
| CAS Number | 22326-31-4 |
| IUPAC Name | 5-sulfobenzene-1,3-dicarboxylic acid |
| EC Number | 244-912-9 |
| Molecular Formula | C6H3(COOH)2SO3H |
| Molecular Weight | 246.19 |
| Exact Mass | 245.9834 |
| SMILES | C1=C(C=C(C=C1C(=O)O)S(=O)(=O)O)C(=O)O |
| InChIKey | CARJPEPCULYFFP-UHFFFAOYSA-N |
| InChI | InChI=1S/C8H6O7S/c9-7(10)4-1-5(8(11)12)3-6(2-4)16(13,14)15/h1-3H,(H,9,10)(H,11,12)(H,13,14,15) |
| PubChem CID | 80714 |
| UN Number | UN2583 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29173930 |
| Tariff Code | 2917398590 |
Safety & GHS
-
Corrosive
GHS05
Hazard statements
- H302 Harmful if swallowed
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 1,3-Benzenedicarboxylic acid, 5-sulfo-
- 1,3-Benzenedicarboxylic acid, 5-sulfo-, monopotassium salt
- 1,3-Benzenedicarboxylic acid, 5-sulfo-, potassium salt (1:1)
- 5-Sulfo-1,3-benzenedicarboxylic acid
- 5-Sulfo-1,3-benzenedicarboxylic acid, monopotassium salt
- 5-sulfobenzene-1,3-dicarboxylic acid
- 5-Sulphoisophthalic acid
- Isophthalic acid, 5-sulfo-
- Monopotassium 5-sulfoisophthalate
- sulfoisophthalic acid
Frequently asked questions
What is 5-Sulfoisophthalic acid commonly used for?
5-Sulfoisophthalic acid is primarily used in the synthesis of dyes, surfactants, and as a monomer for polyesters and polyamides, particularly in water-soluble polymers and specialty chemicals.
What is the chemical formula and molecular weight of 5-Sulfoisophthalic acid?
The chemical formula is **C₆H₃(COOH)₂SO₃H**, and the molecular weight is **246.19 g/mol**.
How should 5-Sulfoisophthalic acid be stored?
Store at **2–8°C** in a cool, dry place, away from incompatible substances. Ensure proper ventilation and use appropriate personal protective equipment (PPE).
What grade or purity is available for 5-Sulfoisophthalic acid?
Molekula supplies **technical-grade** and **high-purity** (98%+) 5-Sulfoisophthalic acid; exact specifications can be confirmed upon inquiry.
Can Molekula supply 5-Sulfoisophthalic acid in bulk quantities?
Yes, we offer bulk packaging options (e.g., 5 kg, 25 kg, or larger) for industrial and commercial applications—contact us for custom quantities.
What documentation comes with an order of 5-Sulfoisophthalic acid?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS/SDS)**, and **batch-specific documentation** to ensure compliance and traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.