Molekula
5-Sulfosalicylic acid dihydrate ≥99%
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
5-Sulfosalicylic acid dihydrate is a white crystalline solid used primarily as a protein precipitant in biochemical assays, particularly in urine protein tests, and as a reagent in analytical chemistry. It’s also employed in the determination of creatinine and in the production of dyes and pharmaceuticals. This high-purity grade (≥99%) features a CAS number of 5965-83-3, a molecular formula of C7H6O6S·2H2O, and a molecular weight of 254.22. Store at ambient conditions. The substance carries a Danger signal word per GHS classification. Molekula supplies 5-Sulfosalicylic acid dihydrate 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.
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| Melting Point | 110.0°C - 112.0°C |
| Chloride (Cl-) | ≤0.01% |
| Residue on Ignition | ≤0.1% |
| Heavy Metals (Pb) | ≤0.01% |
| Solubility in water | 127.1 g/l 20°C |
| Iron (Fe) | ≤0.005% |
| Assay(NaOH Titration) | ≥99.0% |
| Identification (IR) | Conforms to reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90037555 |
| CAS Number | 5965-83-3 |
| IUPAC Name | 2-hydroxy-5-sulfobenzoic acid;dihydrate |
| Molecular Formula | C7H6O6S·2H2O |
| Molecular Weight | 254.22 |
| Exact Mass | 254.0096 |
| SMILES | C1=CC(=C(C=C1S(=O)(=O)O)C(=O)O)O.O.O |
| InChIKey | BHDKTFQBRFWJKR-UHFFFAOYSA-N |
| InChI | InChI=1S/C7H6O6S.2H2O/c8-6-2-1-4(14(11,12)13)3-5(6)7(9)10;;/h1-3,8H,(H,9,10)(H,11,12,13);2*1H2 |
| PubChem CID | 2723734 |
| UN Number | UN3261 |
| REACH Code | Y110 |
| HTS Code | 2918297500 |
| Tariff Code | 2918290090 |
Safety & GHS
-
Corrosive
GHS05
-
Health Hazard
GHS07
Hazard statements
- H302 Harmful if swallowed
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H318 Causes serious 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+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Russian, Spanish.
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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- 2-hydroxy-5-sulfobenzoic acid dihydrate
- 2-HYDROXYBENZOIC-5-SULFONIC ACID DIHYDRATE
- 3-CARBOXY-4-HYDROXYBENZENESULFONIC ACID DIHYDRATE
- 5-SULFOSALICYLIC ACID DIHYRATE
- 5-sulphosalicylic acid dihydrate
- Benzoic acid, 2-hydroxy-5-sulfo-, dihydrate
- BENZOIC ACID, 2-HYDROXY-5-SULFO-, HYDRATE (1:2)
- Salicylic acid, 5-sulfo-, dihydrate
- SALICYLSULFONIC ACID DIHYDRATE
- sulfosalicylic acid dihydrate
Frequently asked questions
What is 5-Sulfosalicylic acid dihydrate commonly used for?
It is primarily used as a protein precipitant in biochemical and clinical laboratories, as well as in analytical chemistry for the detection of proteins and alkaloids.
What is the chemical formula and molecular weight of 5-Sulfosalicylic acid dihydrate?
The formula is C₇H₆O₆S·2H₂O, and the molecular weight is 254.22 g/mol.
How should 5-Sulfosalicylic acid dihydrate be stored?
Store at ambient temperature in a tightly sealed container, away from moisture and incompatible substances.
What purity grade is available for this product?
Molekula supplies it at a ≥99% purity grade, suitable for analytical and biochemical applications.
Can Molekula supply 5-Sulfosalicylic acid dihydrate in bulk quantities?
Yes, bulk quantities are available upon request—please contact our sales team for pricing and logistics details.
What documentation comes with an order of 5-Sulfosalicylic acid dihydrate?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and batch-specific documentation for traceability.
Is 5-Sulfosalicylic acid dihydrate ≥99% dangerous goods for shipping?
Yes. 5-Sulfosalicylic acid dihydrate ≥99% ships as dangerous goods: UN3261, class 8, packing group II.
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.