Molybdenum trioxide
- Iupac Name：oxomolybdenum
- CAS No.: 1313-27-5
- Molecular Weight：111.949
- Modify Date.: 2022-11-01 03:43
- Introduction: Colorless to white or yellow odorless solid. Sinks in water.
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1. Names and Identifiers
- 1.1 Name
- Molybdenum trioxide
- 1.2 Synonyms
EINECS 215-204-7 MFCD00003469 Mo 1202T mo1202t Molybdena MOLYBDENIUM TRIOXIDE pure Molybdenum anhydride Molybdenum(VI) oxide Molybdenum(VI) oxide,(trace metal basis) trioxomolybdenum
- 1.3 CAS No.
- 1313-27-5
- 1.4 CID
- 14802
- 1.5 EINECS(EC#)
- 234-321-4
- 1.6 Molecular Formula
- MoO3 (isomer)
- 1.7 Inchi
- InChI=1S/Mo.3O
- 1.8 InChkey
- JKQOBWVOAYFWKG-UHFFFAOYSA-N
- 1.9 Canonical Smiles
- O=[Mo](=O)=O
- 1.10 Isomers Smiles
- O=[Mo](=O)=O
2. Properties
- 2.1 Density
- 4.692
- 2.1 Melting point
- 795 °C(lit.)
- 2.1 Boiling point
- 1155oC
- 2.1 Flash Point
- 1155°C subl.
- 2.1 Precise Quality
- 115.91600
- 2.1 PSA
- 9.23000
- 2.1 logP
- -0.06430
- 2.1 Solubility
- 0.49g/l
- 2.2 Appearance
- Brown crystalline powder
- 2.3 Storage
- Ambient temperatures.
- 2.4 Chemical Properties
- Molybdenum trioxide is an odorless, white crystalline powder that turns yellow when heated.
- 2.5 Color/Form
- White to gray
- 2.6 Odor
- None
- 2.7 Water Solubility
- 0.5 g/L (20 oC)
- 2.8 StorageTemp
- Store at +5°C to +30°C.
3. Use and Manufacturing
- 3.1 General Description
- Colorless to white or yellow odorless solid. Sinks in water.
- 3.2 Potential Exposure
- Molybdenum trioxide is used inagriculture; manufacture of metallic molybdenum, ceramicglazes; enamels, pigments, and in analytical chemistry.
- 3.3 Purification Methods
- Crystallise it from water (1g/50mL) between 70o and 0o. The solubility in H2O is 0.1% at 18o, and 2% at 70o. It is a white powder which turns yellow reversibly on heating. It sublimes readily at 1155o/760mm. [Hein & Herzog Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p 1412 1965.]
- 3.4 Shipping
- UN2811 Toxic solids, organic, n.o.s., HazardClass: 6.1; Labels: 6.1-Poisonous materials, Technical NameRequired.
- 3.5 Usage
- Molybdenum trioxide (MnO3) is a compound used to make enamels adhere to metals.
4. Safety and Handling
- 4.1 Symbol
- GHS07, GHS08
- 4.1 Hazard Codes
- Xn;
- 4.1 Signal Word
- Warning
- 4.1 Risk Statements
- R36/37:;R48/20/22:;
- 4.1 Safety Statements
- S22:;S25:;
- 4.1 Fire Hazard
- Flash point data for Molybdenum trioxide are not available, but Molybdenum trioxide is probably non-flammable.
- 4.2 Hazard Class
- 6.1
- 4.2 Hazard Declaration
- H319-H335-H351
- 4.2 RIDADR
- NONH for all modes of transport
- 4.2 Safety Profile
- Poison by ingestion,subcutaneous, and intraperitoneal routes.Human systemic effects by inhalation:pulmonary fibrosis and cough. Questionablecarcinogen with experimental neoplastigenicdata. A powerful irritant. Explodes oncontact with molten magnesium. Violent reaction with interhalogens (e.g., brominepentafluoride, chlorine trifluoride).Incandescent reaction with hot sodium,potassium, or lithium. When heated todecomposition it emits toxic fumes of Mo.
- 4.3 Caution Statement
- P261-P281-P305 + P351 + P338
- 4.3 Incompatibilities
- Explodes on contact with moltenmagnesium. Violent reaction with strong oxidizers, such aschlorine trifluoride; bromine pentafluoride. Not compatiblewith strong acids; active metals (sodium, potassium,lithium). Molybdenum trioxide Preparation Products And Raw materials Preparation Products
- 4.4 WGK Germany
- 1
- 4.4 RTECS
- QA4725000
- 4.4 Safety
- Hazard Codes XiRisk Statements 36/37/38Safety Statements 26-37/39WGK Germany 3
RTECS XY2969000
- 4.5 Toxicity
- LD50 orally in Rabbit: 2689 mg/kg LD50 dermal Rat > 2000 mg/kg
5. MSDS
2.Hazard identification
2.1 Classification of the substance or mixture
Eye irritation, Category 2
Specific target organ toxicity \u2013 single exposure, Category 3
Carcinogenicity, Category 2
2.2 GHS label elements, including precautionary statements
| Pictogram(s) |   |
| Signal word | Warning |
| Hazard statement(s) | H319 Causes serious eye irritation H335 May cause respiratory irritation H351 Suspected of causing cancer |
| Precautionary statement(s) | |
| Prevention | P264 Wash ... thoroughly after handling. P280 Wear protective gloves/protective clothing/eye protection/face protection. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P271 Use only outdoors or in a well-ventilated area. P201 Obtain special instructions before use. P202 Do not handle until all safety precautions have been read and understood. |
| Response | P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P337+P313 If eye irritation persists: Get medical advice/attention. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P312 Call a POISON CENTER/doctor/\u2026if you feel unwell. P308+P313 IF exposed or concerned: Get medical advice/ attention. |
| Storage | P403+P233 Store in a well-ventilated place. Keep container tightly closed. P405 Store locked up. |
| Disposal | P501 Dispose of contents/container to ... |
2.3 Other hazards which do not result in classification
none
7. Synthesis Route
1313-27-5Total: 1 Synthesis Route
9. Other Information
- 9.0 Chemical Properties
- Molybdenum trioxide is an odorless, white crystalline powder that turns yellow when heated.
Molybdenum trioxide is perhaps the most important compound of molybdenum. Pure molybdenum trioxide is used in chemical and catalyst manufacture. The technical product is added to steel as an alloying agent. Molybdenum trioxide also serves as a catalyst in the petroleum industry and as a component of ceramics, enamels and pigments.
- 9.1 Physical properties
- Soft white powder; orthorhombic crystals; turns yellow on heating; density 4.69 g/cm3 at 21°C; melts at 795°C without decomposition to a dark yellow liquid; vapor pressure 20 torr at 851°C and 200 torr at 1,014°C; boils at 1,155°C; sparingly soluble in cold water (1.066 g/L at 18°C) and moderately soluble in hot water (20.55 g/L at 70°C); dissolves in acids and alkalies.
- 9.2 Uses
- Molybdenum trioxide (MnO3) is a compound used to make enamels adhere to metals.
- 9.3 Uses
- Chiefly as a reagent for chemical analysis.Used for trace metal analysis.
- 9.4 Potential Exposure
- Molybdenum trioxide is used in agriculture; manufacture of metallic molybdenum, ceramic glazes; enamels, pigments, and in analytical chemistry.
- 9.5 Shipping
- UN2811 Toxic solids, organic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required.
- 9.6 Purification Methods
- Crystallise it from water (1g/50mL) between 70o and 0o. The solubility in H2O is 0.1% at 18o, and 2% at 70o. It is a white powder which turns yellow reversibly on heating. It sublimes readily at 1155o/760mm. [Hein & Herzog Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p 1412 1965.]
- 9.7 Incompatibilities
- Explodes on contact with molten magnesium. Violent reaction with strong oxidizers, such as chlorine trifluoride; bromine pentafluoride. Not compatible with strong acids; active metals (sodium, potassium, lithium).
- 9.8 Usage
- Molybdenum(VI) oxide is a very promising and stable oxide for electrochromic applications and used as a catalyst in the oil industry. It is also used to make metal molybdenum. It has a wide band gap type semiconductor with distinctive electrochromic, thermochromic, and photochromic properties, has been widely investigated as smart materials for catalysis sensors, lubricants, lithium battery, organic solar cells, and display materials.
- 9.9 Usage
- Molybdenum(VI) oxide is a very promising and stable molybdenum oxide for the electrochromic applications and used as a catalyst in oil industries. It is also used to make metal molybdenum. It has a wide band gap n-type semiconductor with distinctive electrochromic, thermochromic, and photochromic properties. It has been widely investigated as a smart material for catalysis sensors, lubricants, lithium battery, organic solar cells, and display materials. Molybdenum(VI) oxide (MoO3) is employed as an adhesive between enamels and metals.
- 9.10 Usage
- Molybdenum(VI) oxide is a very promising and stable oxide for electrochromic applications and used as a catalyst in oil industr. It is also used to make metal molybdenum. It has a wide band gap type semiconductor with distinctive electrochromic, thermochromic, and photochromic properties, has been widely investigated as smart materials for catalysis sensors, lubricants, lithium battery, organic solar cells, and display materials.
- 9.11 Usage
- Its chief application is as an oxidation catalyst and as a raw material for the production of molybdenum metal. It is a Precursor to LAMOX fast ion conductors and superconductors. Molybdenum trioxide has also been suggested as a potential anti-microbial agent, e.g., in polymers. In contact with water, it forms H+ ions that can kill bacteria effectively.
- 9.12 Usage
- It is used as a selective oxidation catalyst, and as a molybdenum oxidase enzyme. It is a source of molybdenum compounds and molybdenum metal which serves as an additive to steel and corrosion-resistant alloys. It is used for lubricants and lubricant additives. It has applications in process regulators, pigments, corrosion inhibitors, electrochemical devices, displays, and smoke suppressants. It finds use in analytical chemistry, ceramic glazes, enamels, energy storage, and in the manufacture of acrylonitrile through catalytic oxidation of ammonia and propene.
- 9.13 Merck
- 14,6239
- 9.14 Chemical Properties
- pale yellowish-green powder
- 9.15 Uses
- Used for trace metal analysis.
- 9.16 Uses
- Molybdenum(VI) oxide is used in catalyst compositions to carry out desulfurization of petroleum feedstocks and to remove nitrogen-containing compounds from petroleum fractions. Other uses of this oxide include preparation of various molybdate salts and as reagents for chemical analyses.
- 9.17 Uses
- Chiefly as a reagent for chemical analysis.
- 9.18 General Description
- Colorless to white or yellow odorless solid. Sinks in water.
- 9.19 Air & Water Reactions
- Insoluble in water.
- 9.20 Reactivity Profile
- Molybdenum trioxide reacts violently with chlorine trifluoride, lithium, potassium and sodium. Readily combines with acids and bases to form a series of polymeric compounds. Incompatible with interhalogens and metals. A violent detonation occurs when heated with molten magnesium.
- 9.21 Hazard
- Toxic material.
- 9.22 Health Hazard
- Compound is relatively nontoxic. Dust irritates eyes.
- 9.23 Fire Hazard
- Flash point data for Molybdenum trioxide are not available, but Molybdenum trioxide is probably non-flammable.
- 9.24 Safety Profile
- Poison by ingestion, subcutaneous, and intraperitoneal routes. Human systemic effects by inhalation: pulmonary fibrosis and cough. Questionable carcinogen with experimental neoplastigenic data. A powerful irritant. Explodes on contact with molten magnesium. Violent reaction with interhalogens (e.g., bromine pentafluoride, chlorine trifluoride). Incandescent reaction with hot sodium, potassium, or lithium. When heated to decomposition it emits toxic fumes of Mo.
- 9.25 Purification Methods
- Crystallise it from water (1g/50mL) between 70o and 0o. The solubility in H2O is 0.1% at 18o, and 2% at 70o. It is a white powder which turns yellow reversibly on heating. It sublimes readily at 1155o/760mm. [Hein & Herzog Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p 1412 1965.]
10. Computational chemical data
- Molecular Weight: 111.949g/mol
- Molecular Formula: MoO3
- Compound Is Canonicalized: True
- XLogP3-AA: null
- Exact Mass: 145.890147
- Monoisotopic Mass: 145.890147
- Complexity: 61.8
- Rotatable Bond Count: 0
- Hydrogen Bond Donor Count: 0
- Hydrogen Bond Acceptor Count: 3
- Topological Polar Surface Area: 51.2
- Heavy Atom Count: 4
- Defined Atom Stereocenter Count: 0
- Undefined Atom Stereocenter Count: 0
- Defined Bond Stereocenter Count: 0
- Undefined Bond Stereocenter Count: 0
- Isotope Atom Count: 0
- Covalently-Bonded Unit Count: 1
- CACTVS Substructure Key Fingerprint: AAADcQAAMAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
11. Question & Answer
-
Molybdenum is an essential element with relatively low toxicity. Enzymes containing molybdenum catalyze basic metabolic reactions in the carbon, sulfur, and nitrogen cycles. Elimination of molybdenum occurs via the kidney and usually is complete within several weeks. Molybdenosis (teart) is a form ...
-
Molybdenum trioxide is chemical compound with the formula MoO3. This compound is produced on the largest scale of any molybdenum compound. It is an intermediate in the production of molybdenum metal. It is also an important industrial catalyst. Molybdenum trioxide occurs as the rare mineral molybdi...
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