Boron oxide , AR,98% , 1303-86-2

Synonym(s):
BO;Boric anhydride;Boron trioxide;Boric Oxide;Boron Trioxide, Boric oxide

CAS NO.：1303-86-2

Empirical Formula: B2O3

Molecular Weight: 69.62

MDL number: MFCD00011315

EINECS: 215-125-8

PRODUCT Properties

• Melting point: 450 °C(lit.)
• Boiling point: 1860 °C
• Density: 2.46 g/mL at 25 °C(lit.)
• vapor density: >1 (vs air)
• vapor pressure: 1Pa
• Flash point: 1860°C
• storage temp.: Inert atmosphere,Room Temperature
• solubility: 36g/l
• form: pellets
• color: White
• Specific Gravity: 2.46 +/- 0.01
• Odor: Odorless
• PH: 4 (10g/l, H2O, 25℃)
• Water Solubility: 36 g/L (25 ºC)
• Sensitive: Hygroscopic
• Merck: 14,1337
• crystal system: Three sides
• Space group: P31
• Lattice constant:
  • a/nm: 0.4334
  • b/nm: 0.4334
  • c/nm: 0.8334
  • α/o: 90
  • β/o: 90
  • γ/o: 120
  • V/nm3: 0.1356
• Exposure limits: ACGIH: TWA 10 mg/m3; OSHA: TWA 15 mg/m3; NIOSH: IDLH 2000 mg/m3; TWA 10 mg/m3
• Stability: Stable. Moisture sensitive. Incompatible with water.
• InChIKey: JKWMSGQKBLHBQQ-UHFFFAOYSA-N

Description and Uses

Boron oxide is a noncombustible, colorless,semitransparent lumps or hard, white, odorless crystals,with slightly bitter taste. Molecular weight=69.64; Boilingpoint=about 1860℃; Freezing/Melting point=about450℃. Hazard Identification (based on NFPA-704 MRating System): Health 2, Flammability 0, Reactivity 0.Moderately soluble in water; solubility=(moderate) 3%;slow reaction.

In preparation of fluxes; component of enamels and glass; catalyst in organic reaction

Safety

• Symbol(GHS): GHS08
• Signal word: Danger
• Hazard statements: H360D
• Precautionary statements: P201-P202-P280-P308+P313-P405-P501
• Hazard Codes: Xi,T
• Risk Statements: 36/37/38-61-60
• Safety Statements: 26-37/39-45-53
• OEB: B
• OEL: TWA: 10 mg/m3
• WGK Germany: 1
• RTECS: ED7900000
• F: 3-10
• TSCA: Yes
• HS Code: 28100010
• Toxicity: LD50 orally in Rabbit: 3150 mg/kg
• IDLA: 2,000 mg/m3