Molekula
Sodium tetraborate pentahydrate
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 pentahydrate is a white crystalline solid used as a buffering agent, preservative, and in the production of boron-based compounds. It is soluble in water and stable under ambient storage conditions. CAS: 12179-04-3, Molecular formula: B4H10Na2O12, Molecular weight: 291.3. Signal word: Danger. Molekula supplies Sodium tetraborate pentahydrate 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
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.
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100 g — £91.90 per pack ex VAT · £110.28 inc. VAT
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Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| Assay/Purity | ≥ 98% |
| Water | ≤ 0.2% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 200 °C |
| Vapour Pressure | 0 mmHg (approx) |
Source: PubChem CID 86341921 (The National Institute for Occupational Safety and Health (NIOSH))
Identification
| Property | Value |
|---|---|
| SKU | 89967949 |
| CAS Number | 12179-04-3 |
| IUPAC Name | disodium;[oxido(oxoboranyloxy)boranyl]oxy-oxoboranyloxyborinate;pentahydrate |
| EC Number | 215-540-4 |
| Molecular Formula | B4H10Na2O12 |
| Molecular Weight | 291.3 |
| Exact Mass | 292.034 |
| SMILES | B(=O)OB([O-])OB([O-])OB=O.O.O.O.O.O.[Na+].[Na+] |
| InChIKey | QZSYXKPOZFXCDM-UHFFFAOYSA-N |
| InChI | InChI=1S/B4O7.2Na.5H2O/c5-1-9-3(7)11-4(8)10-2-6;;;;;;;/h;;;5*1H2/q-2;2*+1;;;;; |
| PubChem CID | 86341921 |
| REACH Code | Y110 |
| HTS Code | 2840190000 |
| Tariff Code | 2840191000 |
Safety & GHS
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
Hazard statements
- H303 May be harmful if swallowed
- H319 Causes serious eye irritation
- H360FD May damage fertility. May damage the unborn child.
Precautionary statements
- P201 Obtain special instructions before use
- P264 Wash thoroughly after handling
- 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
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.
Synonyms
- Boric acid (H2B4O7), disodium salt, pentaborate
- Boric acid(H2B4O7), disodium salt, pentahydrate
- Boron sodium oxide (B4Na2O7), hydrate (1:5)
- Boron sodium oxide pentahydrate
- Boron sodium oxide(B4Na2O7), pentahydrate
- Disodium tetraborate pentahydrate
- QZSYXKPOZFXCDM-UHFFFAOYSA-N
- Sodium borate, pentahydrate
Frequently asked questions
What is sodium tetraborate pentahydrate used for?
It is commonly used as a flux in metallurgy, a cleaning agent, and in the production of borosilicate glass and detergents.
What is the chemical formula and molecular weight?
The formula is B4H10Na2O12 and the molecular weight is 291.3 g/mol.
How should sodium tetraborate pentahydrate be stored?
It should be stored at ambient temperature, in a dry, well-ventilated area, away from incompatible materials.
What grade is available?
Molekula offers sodium tetraborate pentahydrate in technical grade; custom grades may be available upon request.
Can Molekula supply it in bulk?
Yes, Molekula can supply sodium tetraborate pentahydrate in bulk quantities; please contact sales for pricing and availability.
What documentation comes with the order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS); additional documentation can be provided upon request.
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.