三氧化钨
Tungsten(VI) oxide
CAS: 1314-35-8;39318-18-8
Molecular Formula: O.W
三氧化钨 - Names and Identifiers
| Name | Tungsten(VI) oxide |
| Synonyms | C.I. 77901 Tungstenoxide Tungsten oxide trioxotungsten Tungsten trioxide Tungsten(VI) oxide Tungstenoxideyellowgreenpowder TungstenoxidePURATREMyellowpowder Tungstenoxidesinteredlumpsyellowgreenpieces |
| CAS | 1314-35-8 39318-18-8 |
| EINECS | 254-413-8 |
| InChI | InChI=1/3O.W/rO3W/c1-4(2)3 |
三氧化钨 - Physico-chemical Properties
| Molecular Formula | O.W |
| Molar Mass | 199.84 |
| Melting Point | 1470-1475℃ |
| Boling Point | 1750℃ |
| Water Solubility | insoluble |
| Appearance | Yellow to brown powder |
| Storage Condition | Room Temprature |
| Sensitive | Easily absorbing moisture |
| MDL | MFCD00011466 |
| Physical and Chemical Properties | Light yellow powder. melting point 1473 ℃ relative density 7.16 solubility insoluble in water and common inorganic acid, soluble in hot alkali, slightly soluble in hydrofluoric acid. |
| Use | Used in the manufacture of metal tungsten, alloy steel, fire-resistant fabric, etc., and used in the ceramic industry |
三氧化钨 - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R22 - Harmful if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection |
三氧化钨 - Upstream Downstream Industry
| Raw Materials | Sodium hydroxide Ammonia |
| Downstream Products | Phosphotungstic acid |
三氧化钨 - Reference
| Reference Show more | 1. [IF=3.361] Yajun Zheng et al."Microscale flower-like magnesium oxide for highly efficient photocatalytic degradation of organic dyes in aqueous solution."Rsc Adv. 2019 Mar;9(13):7338-7348 |
三氧化钨 - Introduction
Sensitive to humidity. When heated, the color changes from light to dark to dark orange, and returns to the original color after cold. Soluble in alkali hydroxide solution, slightly soluble in acid, insoluble in water. The minimum lethal dose (rat, oral) is 840mg/kg. It's irritating. It sublimates significantly at 850 ℃ and turns green when melted. It is stable in air, insoluble in water and inorganic acids except hydrofluoric acid, and can slowly dissolve in ammonia and concentrated hot sodium hydroxide solution.
Last Update：2022-10-16 17:13:17
三氧化钨 - Introduction
Tungsten(VI) oxide is an inorganic compound with the chemical formula WO3. It is a yellow solid, insoluble in water at room temperature. The following is a description of the nature, use, formulation and safety information of Tungsten(VI) oxide:
Nature:
1. Appearance: Tungsten(VI) oxide is yellow solid, granular or crystalline.
2. Density: its density is about 7.16G/cm3.
3. Melting point and boiling point: The melting point of Tungsten(VI) oxide is about 1473 degrees Celsius, and the boiling point is about 1400 degrees Celsius.
4. Stability: It is a relatively stable compound, which is not easy to react with air, water or most acids at room temperature, but can react with strong bases.
5. Conductivity: Tungsten(VI) oxide shows certain conductivity and can be used in electrolytic cells and electronic devices.
Use:
1. Catalyst: Tungsten(VI) oxide is widely used as catalyst for oxidation reaction, alcohol dehydrogenation, organic synthesis and other important reactions.
2. Pigment: because of its brilliant yellow color, Tungsten(VI) oxide is also often used as a colorant for ceramics, glass, plastics, pigments, etc.
3. Optical applications: in the optical field, Tungsten(VI) oxide can be used to manufacture coatings, filters, infrared reflective materials, etc.
Preparation Method:
There are usually several ways to prepare Tungsten(VI) oxide, the most common are:
1. Direct oxidation method: metal Tungsten is exposed to oxygen at high temperature to make it undergo oxidation reaction to generate Tungsten(VI) oxide.
2. oxide decomposition method: tungstic acid or tungstate is decomposed in a high temperature and reducing atmosphere to obtain Tungsten(VI) oxide.
Safety Information:
Tungsten(VI) oxide is relatively safe under general conditions of use, but the following points need to be paid attention to during processing and preparation:
1. Inhalation or exposure to high concentrations of Tungsten(VI) oxide dust may cause irritation to the respiratory tract, eyes and skin, and appropriate protective measures should be taken.
2. Avoid contact with strong oxidants and strong bases to avoid violent reactions.
3. When dealing with Tungsten(VI) oxide, care should be taken to avoid flying dust to prevent inhalation or explosion.
Before using Tungsten(VI) oxide, it is recommended to take corresponding safety measures according to the specific situation and follow appropriate operating procedures.
Nature:
1. Appearance: Tungsten(VI) oxide is yellow solid, granular or crystalline.
2. Density: its density is about 7.16G/cm3.
3. Melting point and boiling point: The melting point of Tungsten(VI) oxide is about 1473 degrees Celsius, and the boiling point is about 1400 degrees Celsius.
4. Stability: It is a relatively stable compound, which is not easy to react with air, water or most acids at room temperature, but can react with strong bases.
5. Conductivity: Tungsten(VI) oxide shows certain conductivity and can be used in electrolytic cells and electronic devices.
Use:
1. Catalyst: Tungsten(VI) oxide is widely used as catalyst for oxidation reaction, alcohol dehydrogenation, organic synthesis and other important reactions.
2. Pigment: because of its brilliant yellow color, Tungsten(VI) oxide is also often used as a colorant for ceramics, glass, plastics, pigments, etc.
3. Optical applications: in the optical field, Tungsten(VI) oxide can be used to manufacture coatings, filters, infrared reflective materials, etc.
Preparation Method:
There are usually several ways to prepare Tungsten(VI) oxide, the most common are:
1. Direct oxidation method: metal Tungsten is exposed to oxygen at high temperature to make it undergo oxidation reaction to generate Tungsten(VI) oxide.
2. oxide decomposition method: tungstic acid or tungstate is decomposed in a high temperature and reducing atmosphere to obtain Tungsten(VI) oxide.
Safety Information:
Tungsten(VI) oxide is relatively safe under general conditions of use, but the following points need to be paid attention to during processing and preparation:
1. Inhalation or exposure to high concentrations of Tungsten(VI) oxide dust may cause irritation to the respiratory tract, eyes and skin, and appropriate protective measures should be taken.
2. Avoid contact with strong oxidants and strong bases to avoid violent reactions.
3. When dealing with Tungsten(VI) oxide, care should be taken to avoid flying dust to prevent inhalation or explosion.
Before using Tungsten(VI) oxide, it is recommended to take corresponding safety measures according to the specific situation and follow appropriate operating procedures.
Last Update：2024-04-10 22:29:15
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Raw Materials for 三氧化钨
Downstream Products for 三氧化钨