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ChemicalBook >> CAS DataBase List >>Molybdenum trioxide

Molybdenum trioxide

CAS No.
1313-27-5
Chemical Name:
Molybdenum trioxide
Synonyms
MoO3;MOLYBDENUM OXIDE;MoL;MOLYBDIC OXIDE;MOLYBDIC ANHYDRIDE;MOLYBDENUM(VI) OXIDE;mo1202t;LT-E003;Mo 1202T;Molybdena
CBNumber:
CB6180308
Molecular Formula:
MoO3
Molecular Weight:
143.94
MDL Number:
MFCD00003469
MOL File:
1313-27-5.mol
MSDS File:
SDS
Last updated:2024-12-18 14:15:30

Molybdenum trioxide Properties

Melting point 795 °C(lit.)
Boiling point 1155 °C
Density 4.692
vapor pressure 0Pa at 20℃
Flash point 1155°C subl.
storage temp. Store at +5°C to +30°C.
solubility 0.49g/l
form Sublimed Powder
Specific Gravity 4.69
color White to gray
Water Solubility 0.5 g/L (20 ºC)
Merck 14,6239
crystal system Nogata
Space group Pnma
Lattice constant
a/nmb/nmc/nmα/oβ/oγ/oV/nm3
1.3850.36960.39669090900.203
Exposure limits ACGIH: TWA 10 mg/m3; TWA 3 mg/m3
NIOSH: IDLH 5000 mg/m3
InChIKey JKQOBWVOAYFWKG-UHFFFAOYSA-N
CAS DataBase Reference 1313-27-5(CAS DataBase Reference)
EWG's Food Scores 2
FDA UNII 22FQ3F03YS
IARC 2B (Vol. 118) 2018
NIST Chemistry Reference Molybdenum(vi) oxide(1313-27-5)
EPA Substance Registry System Molybdenum trioxide (1313-27-5)

SAFETY

Risk and Safety Statements

Symbol(GHS)  GHS hazard pictogramsGHS hazard pictograms
GHS07,GHS08
Signal word  Warning
Hazard statements  H319-H335-H351
Precautionary statements  P201-P305+P351+P338-P308+P313
Hazard Codes  Xn,Xi
Risk Statements  36/37-48/20/22-40
Safety Statements  22-23-25-36/37
WGK Germany  1
RTECS  QA4725000
TSCA  Yes
HazardClass  6.1
HS Code  28257000
Hazardous Substances Data 1313-27-5(Hazardous Substances Data)
Toxicity LD50 orally in Rabbit: 2689 mg/kg LD50 dermal Rat > 2000 mg/kg
NFPA 704
0
2 0

Molybdenum trioxide price More Price(62)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich NIST423 Molybdenum oxide concentrate NIST?SRM?423 1313-27-5 60g $914 2024-03-01 Buy
Sigma-Aldrich 775703 Molybdenum(VI) oxide nanopowder, 100?nm (TEM), 99.5% trace metals basis 1313-27-5 5G $94.6 2024-03-01 Buy
Sigma-Aldrich 203815 Molybdenum(VI) oxide 99.97% trace metals basis 1313-27-5 5g $86.4 2024-03-01 Buy
Sigma-Aldrich 203815 Molybdenum(VI) oxide 99.97% trace metals basis 1313-27-5 25g $326 2024-03-01 Buy
Sigma-Aldrich 1.00403 Molybdenum(VI) oxide for analysis EMSURE? 1313-27-5 100g $307 2024-03-01 Buy
Product number Packaging Price Buy
NIST423 60g $914 Buy
775703 5G $94.6 Buy
203815 5g $86.4 Buy
203815 25g $326 Buy
1.00403 100g $307 Buy

Molybdenum trioxide Chemical Properties,Uses,Production

Description

Molybdenum trioxide is an odorless, whitecrystalline powder that turns yellow when heated; Freezing/Melting point 5 795℃. Hazard Identification (based onNFPA-704 M Rating System): Health 2, Flammability 0,Reactivity 0. Slightly soluble in water.

Chemical Properties

Molybdenum trioxide is an odorless, white crystalline powder that turns yellow when heated.
Molybdenum trioxide
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.

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.

Uses

Molybdenum trioxide (MnO3) is a compound used to make enamels adhere to metals.

Uses

Chiefly as a reagent for chemical analysis.Used for trace metal analysis.

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.

Preparation

Molybdenum(VI) oxide is obtained by igniting molybdenum or its compounds in air:
2Mo + 3O2 → 2MoO3
2MoS2 + 7O2 → 2MoO3 + 4SO2
MoS2 + 4O2 → MoO3 + SO2 + SO3
Roasting the sulfide is carried out in a multiple-hearth roaster under controlled temperature and airflow. The product mixture is sublimed to obtain high purity oxide.
Purified molybdenum(VI) oxide also is made by prolonged heating of ammonium molybdate in air:
(NH4)2Mo2O7 → 2MoO3 + 2NH3 + H2O
An alternative method involves repeatedly evaporating a mixture of ammonium molybdate and nitric acid. Ammonium nitrate so formed is separated from the product molybdenum(VI) oxide by extraction with water:
(NH4)2Mo2O7 + 2HNO3 → 2MoO3 + 2NH4NO3 + H2O

Definition

ChEBI: Molybdenum trioxide is a molybdenum oxide.

General Description

Colorless to white or yellow odorless solid. Sinks in water.

Air & Water Reactions

Insoluble in water.

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.

Hazard

Toxic material.

Health Hazard

Compound is relatively nontoxic. Dust irritates eyes.

Fire Hazard

Flash point data for Molybdenum trioxide are not available, but Molybdenum trioxide is probably non-flammable.

Flammability and Explosibility

Non flammable

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.

Potential Exposure

Molybdenum trioxide is used in agriculture; manufacture of metallic molybdenum, ceramic glazes; enamels, pigments, and in analytical chemistry.

First aid

If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit

storage

Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Prior to working with thischemical you should be trained on its proper handling andstorage. Molybdenum trioxide must be stored to avoid contact with strong acids (such as hydrochloric, sulfuric, andnitric); alkalis, sodium, potassium, and molten magnesiumsince violent reactions occur. Store in tightly closed containers in a cool, well-ventilated area.

Shipping

UN2811 Toxic solids, organic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required.

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.]

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).

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View Lastest Price from Molybdenum trioxide manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
molybdenum trioxide pictures 2024-12-20 molybdenum trioxide
1313-27-5
 US $10.00 / kg 1kg 99% 20ton Hebei Zhuanglai Chemical Trading Co.,Ltd
Molybdenum trioxide pictures 2024-12-13 Molybdenum trioxide
1313-27-5
 US $0.00 / KG 1KG 98%min 30tons/month WUHAN FORTUNA CHEMICAL CO., LTD
Molybdenum trioxide pictures 2024-11-11 Molybdenum trioxide
1313-27-5
 US $8.00-3.00 / kg 1kg 99% 10 tons Shandong Deshang Chemical Co., Ltd.
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