Sodium borate (NaBO2)
Sodium metaborate
CAS: 7775-19-1
Molecular Formula: BNaO2
Sodium borate (NaBO2) - Names and Identifiers
Sodium borate (NaBO2) - Physico-chemical Properties
| Molecular Formula | BNaO2 |
| Molar Mass | 65.8 |
| Density | 2.464 |
| Melting Point | 966 °C |
| Boling Point | 1434 °C |
| Water Solubility | g/100g solution H2O: 14.10 (0°C), 22.00 (25°C), 55.60 (100°C); solid phase, NaBO2 ·4H2O (0°C, 25°C), NaBO2 · 2H2O (100°C) [KRU93] |
| Appearance | white hexagonal crystals |
| pKa | 8.94[at 20 ℃] |
| Physical and Chemical Properties | Sodium metaborate is an intermediate in the production of borax, the chemical formula nabo2. Molecular weight 65.80. Colorless hexagonal prismatic crystals. The melting point is 966 ℃, the boiling point is 1434 ℃, and the relative density is 2.464. Soluble in water, glycerol, difficult to dissolve in ethanol, insoluble in acid. The aqueous solution is strongly alkaline. Sodium metaborate tetrahydrate is colorless or white crystal, melting point 57 ℃, soluble in water, the solution is strong alkaline, insoluble in ethanol, heated to 120 ℃ will lose 1 molecule of crystal water. Preparation Method: The boron magnesium ore stone by calcination after grinding, with 30% caustic soda solution heating decomposition, and then filtered, concentrated, cooled, crystallized and obtained. Purposes: used as analytical reagents, rust remover and detergents. |
| Use | Used as analytical reagents, preservatives |
Sodium borate (NaBO2) - Risk and Safety
| UN IDs | UN3077(solid) |
Sodium borate (NaBO2) - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | use as analytical reagent, preservative |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 02:00:11
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