Borax is a mineral with formula of Na2B4O5(OH)4·8H2O. The IMA symbol is Brx.
Health hazard
⚠️ For information only; not a substitute for the official Safety Data Sheet (SDS).
Borax is a mineral with formula of Na2B4O5(OH)4·8H2O. The IMA symbol is Brx.
| Physical Description | Liquid; Other Solid; Large Crystals; Wet Solid; Dry Powder |
| Color/Form | White, monoclinic crystals |
| Odor | Odorless |
| Melting Point | 75 °C (decomposes) |
| Boiling Point | 608 °F |
| Density | 1.73 g/cu cm |
| Solubility | Aqueous solution is alkaline to litmus and phenolphthalein; pH about pH = 9.5 |
| Vapor Pressure | Approximately 0 mm Hg |
| Refractive Index | Index of refraction: 1.447 (alpha); 1.469 (beta); 1.472 (gamma) |
| Stability/Shelf Life | Stable. When heated above about 62 °C, borax loses water of crystallization, first forming the pentahydrate and then anhydrous sodium tetraborate. |
| IUPAC Name | disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane;decahydrate |
| Molecular Formula | B4H20Na2O17 |
| Molecular Weight | 381.4 g/mol |
| CAS | 1303-96-4 |
| SMILES | B1(OB2OB(OB(O1)O2)[O-])[O-].O.O.O.O.O.O.O.O.O.O.[Na+].[Na+] |
| InChIKey | CDMADVZSLOHIFP-UHFFFAOYSA-N |
| Catalog No | KC.210146 |
| Pack sizes | 500GM |
⚠️ For information only; not a substitute for the official SDS.