Borax (decahydrate) 99% Extrapure
Sodium tetraborate decahydrate; Borax decahydrate; Sodium borate decahydrate
Product Code. |
00447 |
Grade |
Extrapure |
Purity |
99% |
CAS No. |
1303-96-4 |
Molecular Formula |
Na2B4O7·10H2O |
Molecular Weight |
381.37 |
H.S.Code |
2840.11000 |
Shelf Life |
60 Months |
Physical Properties
| Physical state at 20 °C |
Solid |
Colour |
White crystalline |
Odour |
Odorless |
| pH value |
9.2 |
Melting point/ Freezing point [°C] |
62 °C |
Boiling point [°C] |
320°C |
| Density [g/cm3] |
1.73 |
Solubility in water [% weight] |
39 g/l at 20 °C - completely soluble |
Packaging
Specification
| Appearance | A white crystalline powder |
| Assay (acidimetric) | 99.0 - 103.0% |
| pH (5% solution in water) | 9.2 - 9.5 |
| Carbonate, bicarbonate | Passes test |
| Sulphate (SO4) | Max 0.005% |
| Heavy metal (as Pb) | Max 0.002% |
| Ammonium (NH4) | Max 0.001% |
| Arsenic (As) | Max 0.0005% |
| Calcium (Ca) | Max 0.01% |
Safety Information and Hazard Symbols
Symbol: GHS08
Signal Word: Danger
Hazardous Statement: H360FD
Precaution Statement: P201-P308 + P313