Product description

Chinese name: boron trioxide

English name: Boron oxide

Alias: boron oxide, boron anhydride, boric anhydride, anhydrous boric acid

Features: strong water absorption

Content: 99.5%

Executive standard: Q/TY-J08.04-2010

HS Code: 2810001000

CAS number: 1303-86-2

Boron trioxide (also known as boron oxide/boric anhydride), colorless glassy crystal or powder, melting point 450℃. It has strong water absorption and is converted into boric acid, so it should be stored in a dry environment to prevent the content from being degraded due to water absorption. It is slightly soluble in cold water and easily soluble in hot water. The surface is greasy and can be reduced to single boron by alkali metals or magnesium and aluminum at high temperature. Oxidation is soluble in acid, ethanol, hot water, slightly soluble in cold water, and can be combined with several metals to form boron glass with characteristic colors, which is completely miscible with oxides of alkali, metallic copper, silver, aluminum, arsenic, and tin. The density of crystalline boron oxide is 2.46g/cm3, the density of amorphous boron oxide is 1.80-1.84g/cm3, melting point: 557°C, solubility: (g/100gH20): 1.1 (0°C) 15.7 (100°C) extremely It is easy to absorb water, becomes cloudy after absorbing temperature, and can also be dissolved in alcohol. When the temperature is low, the dehydration of H3BO3 can obtain boron trioxide crystals. This crystal contains BO4 tetrahedral structural unit, the density is 1.805g/cm3, the melting point is 450℃, the density of glassy boron oxide is 1.795g/cm3, it gradually softens when the temperature rises, and becomes liquid when it reaches the red hot high temperature, the boiling point is 1500 °C. Boron is also directly combined with oxygen to obtain B2O3. Our company also produces electronic grade boric anhydride and industrial grade boric anhydride with low iron content, which can meet the production needs of customers.

 Product parameters

1. Appearance: Colorless vitreous body or powder

2. Shrinking point: 450℃

3. Boiling point: 1860℃

4. Density: 1.085g/mL (amorphous)

5. Solubility: This product is soluble in acid, ethanol, hot water, slightly soluble in cold water

6. Characteristics: off-white powder, greasy on the surface, strong hygroscopicity, easy to hydrolyze to form boric acid, can be reduced to single crystal boron by alkali metal or magnesium at high temperature; can be mixed with oxides of metals, copper, silver, aluminum, tin, arsenic Completely miscible.

 Technical indicators