Boric anhydride
SIAL/15678 - puriss. p.a., ≥98% (T)
Synonym: Boron trioxide
CAS Number: 1303-86-2
Empirical Formula (Hill Notation): B2O3
Molecular Weight: 69.62
EC Number: 215-125-8
MDL Number: MFCD00011315
Linear Formula: B2O3
Product Type: Chemical
| anion traces | chloride (Cl-): ≤20 mg/kg |
| sulfate (SO42-): ≤50 mg/kg | |
| assay | ≥98% (T) |
| cation traces | Ag: ≤5 mg/kg |
| Al: ≤50 mg/kg | |
| Ba: ≤5 mg/kg | |
| Bi: ≤5 mg/kg | |
| Ca: ≤10 mg/kg | |
| Cd: ≤5 mg/kg | |
| Co: ≤5 mg/kg | |
| Cr: ≤5 mg/kg | |
| Cu: ≤5 mg/kg | |
| Fe: ≤5 mg/kg | |
| K: ≤30 mg/kg | |
| Mg: ≤20 mg/kg | |
| Mn: ≤5 mg/kg | |
| Mo: ≤5 mg/kg | |
| Na: ≤200 mg/kg | |
| Ni: ≤5 mg/kg | |
| Pb: ≤30 mg/kg | |
| Sr: ≤5 mg/kg | |
| Tl: ≤10 mg/kg | |
| Zn: ≤5 mg/kg | |
| density | 2.46 g/mL at 25 °C (lit.) |
| form | solid |
| grade | puriss. p.a. |
| InChI | 1S/B2O3/c3-1-5-2-4 |
| InChI key | JKWMSGQKBLHBQQ-UHFFFAOYSA |
| loss | ≤3% loss on ignition, 900 °C |
| mp | 450 °C (lit.) |
| Quality Level | 100  |
| SMILES string | O=BOB=O |
| vapor density | >1 (vs air) |
| Application: | Boric anhydride can be used as a boron precursor to synthesize: • Boron carbon nitride nanosheet (BCN) by thermal condensation reaction with urea and melamine. • Boron-doped reduced graphene oxide (B-rGO) via a chemical vapor deposition method. It can also be used as an additive along with pinacol to synthesize 4-alkoxy-5-hydroxy-2-pent |
| General description: | Boric anhydride (Boron trioxide) is a colorless glassy hygroscopic mass having rhombic crystals. Its dissolution in water is a highly exothermic reaction and orthoboric acid is formed. It can be prepared by heating boric acid. It is used as flux in metallurgical processes. It has been reported as an inhibitor of crystallization. |
| Other Notes: | Reagent for the decomposition of silicates by fusion |
| Symbol |  GHS08 |
| Signal word | Danger |
| Hazard statements | H360D |
| Precautionary statements | P201 - P202 - P280 - P308 + P313 - P405 - P501 |
| Hazard Codes | T |
| Risk Statements | 60-61 |
| Safety Statements | 53-45 |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 1 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | ≥98% (T) |
| mp | 450 °C (lit.) |
| Density | 2.46 g/mL at 25 °C (lit.) |
| UNSPSC | 12352300 |