Molekula
CAPSO Sodium salt
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
CAPSO Sodium salt is a buffering agent used in biochemical and molecular biology applications to maintain stable pH conditions. CAPSO has a pKa of about 9.6 at 25 °C, giving it a useful buffering range of approximately pH 8.9 to 10.3. Available with a CAS number of 102601-34-3, molecular formula C9H18NO4SNa, and molecular weight of 259.30 g/mol, it is stored at ambient temperature. The substance is classified as Danger.
Molekula supplies CAPSO Sodium salt at ≥ 99% purity (Titration) in 100 g packs, from £103.44 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 — £86.20 per pack ex VAT · £103.44 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 crystalline powder |
| Water | ≤ 6.0% |
| Heavy metals | ≤ 5ppm |
| pH (1% aq. sol.) | 10.9 - 11.6 |
| Identification (IR) | Conforms |
| A260 (0.1M aq.) | ≤ 0.1 |
| A280 (0.1M aq.) | ≤ 0.1 |
| Assay (Titration) on dried basis | ≥ 99% |
| Solubility 10% in water | Clear, colourless solution |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
Identification
| Property | Value |
|---|---|
| SKU | 41933774 |
| CAS Number | 102601-34-3 |
| Molecular Formula | C9H18NO4SNa |
| Molecular Weight | 259.30 |
| SMILES | C1=CC=C(C=C1)NC[C@@H](CS(=O)(=O)[O-])O |
| REACH Code | Y110 |
| Tariff Code | 2922190090 |
Safety & GHS
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Corrosive
GHS05
Hazard statements
- H318 Causes serious eye damage
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- 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
- P337+313 If eye irritation persists get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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
No alternate names recorded for this product.
Frequently asked questions
What is CAPSO Sodium salt used for?
CAPSO Sodium salt is primarily used as a buffering agent in biochemical and molecular biology applications, particularly in enzyme assays and protein purification.
What is the chemical formula and molecular weight of CAPSO Sodium salt?
The formula is C9H18NO4SNa with a molecular weight of 259.30 g/mol.
How should CAPSO Sodium salt be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade of CAPSO Sodium salt is available?
Molekula supplies CAPSO Sodium salt in high-purity grade suitable for research and laboratory use.
Can Molekula supply CAPSO Sodium salt in bulk?
Yes, Molekula can supply CAPSO Sodium salt in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with a purchase of CAPSO Sodium salt?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
Where can I buy CAPSO Sodium salt?
Directly from Molekula, which lists CAPSO Sodium salt in 100 g packs from £103.44 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.
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.