半岛bd体育手机客户端 说明

一般描述

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.

应用

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-pentenoate derivatives by Pd-catalyzed reaction of α, β-unsaturated γ, δ-epoxy esters with various alcohols.

其他说明

通过熔融作用分解硅酸盐的试剂

基本信息

经验(实验)分子式	B2O3
分子量	69.62
EC 号	215-125-8
MDL编号	MFCD00011315
PubChem化学物质编号	57647516
NACRES	NA.21

半岛bd体育手机客户端 性质

质量水平	100
蒸汽密度	>1 (vs air)
等级	puriss. p.a.
测定	≥98% (T)
缺失	≤3% loss on ignition, 900 ℃
mp	450 ℃ (lit.)
密度	2.46 g/mL at 25 ℃ (lit.)
痕量阴离子	chloride (Cl-): ≤20 mg/kg sulfate (SO42-): ≤50 mg/kg
痕量阳离子	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
SMILES string	O=BOB=O
InChI	1S/B2O3/c3-1-5-2-4
InChI key	JKWMSGQKBLHBQQ-UHFFFAOYSA-N

安全信息

象形图
警示用语：	Danger
危险声明	H360D
预防措施声明	P201 - P202 - P280 - P308 + P313 - P405 - P501
危险分类	Repr. 1B
储存分类代码	6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
WGK	WGK 1
闪点(F)	Not applicable
闪点(C)	Not applicable
个人防护装备	dust mask type N95 (US), Eyeshields, Gloves