Borax (decahydrate) 99.5% AR
Buffer substance.
Sodium tetraborate decahydrate; Borax decahydrate; Sodium borate decahydrate ;Di-Sodium Tetraborate(decahydrate)
Product Code. |
00448 |
Grade |
AR |
Purity |
99.5% |
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) | 99.5 - 103% |
| Identity | Passes test |
| Clarity of solution | Passes test |
| Insoluble matter | Max 0.005% |
| pH (0.01 M solution; 25°C) | 9.15 - 9.20 |
| pH (4% solution in water) | 9.0 - 9.6 |
| Chloride (Cl) | Max 0.0007% |
| Phosphate (PO4) | Max 0.001% |
| Sulphate (SO4) | Max 0.005% |
| Heavy metal (as Pb) | Max 0.001% |
| Arsenic (As) | Max 0.0005% |
| Calcium (Ca) | Max 0.005% |
| Copper (Cu) | Max 0.0005% |
| Iron (Fe) | Max 0.0005% |
| Ammonium (NH4) | Max 0.001% |
| Lead (Pb) | Max 0.0005% |
Safety Information and Hazard Symbols
Symbol: GHS08
Signal Word: Danger
Hazardous Statement: H360FD
Precaution Statement: P201-P308 + P313