Molekula
5-Sulfosalicylic acid dihydrate
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 an aromatic sulfonic acid derivative used primarily as a protein precipitant in biochemical assays, including urine protein tests, and as a reagent in analytical chemistry for metal ion detection. It appears as a white to off-white crystalline powder with high solubility in water. CAS 5965-83-3, molecular formula C7H6O6S·2H2O, molecular weight 254.22 g/mol. Stored at ambient conditions. Hazard classification: Danger (corrosive, acute toxicity).
Molekula supplies 5-Sulfosalicylic acid dihydrate in 100 g and 500 g packs, from £31.56 inc. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 6 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £26.30 per pack ex VAT · £31.56 inc. VAT
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500 g — £76.30 per pack ex VAT · £91.56 inc. VAT
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 to off-white crystal |
| Moisture | 22% max |
| Iron (Fe) | <0.005% |
| Sulphates (SO4)(2-) | 5.5% max |
| Total Acid | 99 - 104% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 27492718 |
| 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
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Corrosive
GHS05
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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 assays, such as urine protein tests, and as a reagent in analytical chemistry for metal ion complexation.
What is the molecular formula and molecular weight of 5-Sulfosalicylic acid dihydrate?
The molecular formula is C7H6O6S·2H2O, and the molecular weight is 254.22 g/mol.
What safety classification does 5-Sulfosalicylic acid dihydrate have?
The product has a Signal Word of 'Danger' due to its corrosive and hazardous properties.
How should 5-Sulfosalicylic acid dihydrate be stored?
Store at ambient temperature in a tightly sealed container, away from moisture and incompatible substances.
Does Molekula offer 5-Sulfosalicylic acid dihydrate in bulk quantities?
Yes, Molekula can supply 5-Sulfosalicylic acid dihydrate in bulk—please contact us for pricing and availability.
What documentation comes with an order of 5-Sulfosalicylic acid dihydrate?
Each order includes a Certificate of Analysis (CoA), Safety Data Sheet (SDS), and a product specification sheet.
Where can I buy 5-Sulfosalicylic acid dihydrate?
Directly from Molekula, which lists 5-Sulfosalicylic acid dihydrate in 100 g and 500 g packs from £31.56 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
Is 5-Sulfosalicylic acid dihydrate dangerous goods for shipping?
Yes. 5-Sulfosalicylic acid dihydrate 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.