Molekula
Sodium tetraborate decahydrate (Borax decahydrate) (unlb.)
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
Sodium tetraborate decahydrate, commonly known as borax decahydrate, is a versatile chemical compound widely used as a buffer in pH regulation, a flux in metallurgy, and in household detergents, cosmetics, and fire retardants. It also serves as a water softener and cleaning agent. This white crystalline powder has a CAS number of 1303-96-4, with the molecular formula Na₂B₄O₇·10H₂O and a molecular weight of 381.37 g/mol. It is stored at ambient conditions but requires careful handling due to its **Danger** classification. Molekula supplies sodium tetraborate decahydrate 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 | Colourless crystalline or white crystalline powder |
| pH | 9.0-9.6 |
| Chloride (Cl-) | ≤0.02% |
| Assay | 99.0 - 103% |
| Aerobic Bacterial Count | ≥ 1000cfu/g |
| Iron (Fe) | ≤0.003% |
| Arsenic (As) | ≤0.0005% |
| Calcium (Ca) | ≤0.01% |
| Sulphates (SO4)(2-) | ≤0.04% |
| Mould & Yeast | ≥ 100cfu/g |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
Identification
| Property | Value |
|---|---|
| SKU | 90032421 |
| CAS Number | 1303-96-4 |
| Molecular Formula | Na2B4O7·10H2O |
| Molecular Weight | 381.37 |
| SMILES | B1(OB2OB(OB(O1)O2)[O-])[O-].O.O.O.O.O.O.O.O.O.O.[Na+].[Na+] |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2840.19.0000 |
| Tariff Code | 2840199000 |
Safety & GHS
-
Health Hazard
GHS07
-
Serious Health Hazard
GHS08
Hazard statements
- H319 Causes serious eye irritation
- H360FD May damage fertility. May damage the unborn child.
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P263 Avoid contact during pregnancy/while nursing
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
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.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is sodium tetraborate decahydrate commonly used for?
Sodium tetraborate decahydrate is widely used as a buffer in pH regulation, a flux in metallurgy, a water softener, and in household detergents, as well as in laboratory applications like buffer preparation and flame retardants.
What is the chemical formula and molecular weight of sodium tetraborate decahydrate?
The chemical formula is **Na₂B₄O₇·10H₂O**, and the molecular weight is **381.37 g/mol**.
What safety classification does sodium tetraborate decahydrate have?
The product has a **Signal Word: Danger** and should be handled with care, following appropriate safety protocols (e.g., eye/skin protection).
What grades of sodium tetraborate decahydrate does Molekula supply?
Molekula supplies **laboratory grade (reagent grade)** sodium tetraborate decahydrate, suitable for analytical and industrial applications.
Can Molekula supply sodium tetraborate decahydrate in bulk quantities?
Yes, Molekula can supply sodium tetraborate decahydrate in bulk, with quantities tailored to your specific requirements—please contact us for details.
What documentation is provided with an order of sodium tetraborate decahydrate?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and batch-specific documentation for 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.