BORON OXIDE
Boron oxide
CAS: 54566-73-3
Molecular Formula:
BORON OXIDE - Names and Identifiers
| Name | Boron oxide |
| Synonyms | Boron oxide |
| CAS | 54566-73-3 |
| EINECS | 259-231-2 |
BORON OXIDE - Physico-chemical Properties
| Physical and Chemical Properties | Boron trioxide (chemical formula: B2O3), also known as boron oxide, is the most important oxide of boron. It is a white waxy solid, which generally exists in an amorphous state and is difficult to form crystals, but can also crystallize after high-strength annealing. It is one of the most difficult substances known to crystallize. Boron trioxide has strong water absorption and is converted into boric acid, so it should be sealed and stored in a dry environment to prevent the content decrease caused by water absorption and deterioration. It is slightly soluble in cold water and easily soluble in hot water, boron anhydride is a colorless glass-like crystal or powder, tasteless, smooth surface feel, at high temperature can be alkali metal or magnesium, aluminum reduced to monomer boron. Oxidation is soluble in acid, ethanol, hot water, slightly soluble in cold water, can be synthesized with a number of metallization with boron glass with characteristic color, can be with alkali, metal copper, silver, aluminum, arsenic, the tin oxide is completely miscible. 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 ℃, solubility:(g/100 gH20):1.1(0 degrees C) 15.7(100 degrees C) is very easy to absorb water, After absorbing the temperature, it becomes turbid and can also be dissolved in alcohol. Boron trioxide crystals can be obtained by dehydration of H3BO3 at low temperature. This crystal contains BO4 tetrahedral structural unit, density 1.805g/cm3, melting point of 450 deg C glass-like boron oxide density of 1.795g/cm3, the temperature increases gradually soften, when it reaches the red hot temperature, it becomes a liquid, boiling point at 1500. Boron is also directly combined with oxygen to obtain B2O3. |
BORON OXIDE - Introduction
Boron oxide, chemical formula B2O3, is an inorganic compound. The following is a description of the nature, use, formulation and safety information of Boron oxide:
Nature:
1. Appearance: Boron oxide is a colorless solid with a glassy or crystalline form;
2. Density: 2.46g/cm³;
3. Melting Point: 450-470 ° C;
4. Solubility: Boron oxide is very soluble in water and reacts with inorganic acid;
5. Chemical stability: It is an oxidizing compound that can react with many metals, non-metals and organic compounds.
Use:
1. Glass processing: Boron oxide is commonly used in the glass industry as a glass flux, which can adjust the viscosity and fluidity of the glass;
2. Flame retardant: It can also be used in fire retardant coatings, plastics and textiles, as a flame retardant to increase the flame retardant properties of materials;
3. Catalyst: Boron oxide is used as a catalyst for some organic synthesis reactions, such as esterification and addition reactions.
Preparation Method:
1. From boric acid or ammonium borate: Boron oxide can be dehydrated by heating boric acid or ammonium borate solids;
2. Hydrothermal method: in high temperature and high pressure water, boric acid reacts with alkali or boric acid reacts with ammonium borate to generate Boron oxide.
Safety Information:
1. Boron oxide is non-toxic, but its particles can cause irritation to eyes and skin;
2. When using or preparing Boron oxide, it is recommended to wear protective glasses and laboratory gloves to avoid direct contact;
3. Store it in a sealed container, away from fire and oxidant;
4. When handling Boron oxide, pay attention to dust prevention and avoid inhaling dust.
Nature:
1. Appearance: Boron oxide is a colorless solid with a glassy or crystalline form;
2. Density: 2.46g/cm³;
3. Melting Point: 450-470 ° C;
4. Solubility: Boron oxide is very soluble in water and reacts with inorganic acid;
5. Chemical stability: It is an oxidizing compound that can react with many metals, non-metals and organic compounds.
Use:
1. Glass processing: Boron oxide is commonly used in the glass industry as a glass flux, which can adjust the viscosity and fluidity of the glass;
2. Flame retardant: It can also be used in fire retardant coatings, plastics and textiles, as a flame retardant to increase the flame retardant properties of materials;
3. Catalyst: Boron oxide is used as a catalyst for some organic synthesis reactions, such as esterification and addition reactions.
Preparation Method:
1. From boric acid or ammonium borate: Boron oxide can be dehydrated by heating boric acid or ammonium borate solids;
2. Hydrothermal method: in high temperature and high pressure water, boric acid reacts with alkali or boric acid reacts with ammonium borate to generate Boron oxide.
Safety Information:
1. Boron oxide is non-toxic, but its particles can cause irritation to eyes and skin;
2. When using or preparing Boron oxide, it is recommended to wear protective glasses and laboratory gloves to avoid direct contact;
3. Store it in a sealed container, away from fire and oxidant;
4. When handling Boron oxide, pay attention to dust prevention and avoid inhaling dust.
Last Update：2024-04-10 22:29:15
