Molybdenum

CAS Number
7439-98-7
EC Number
231-107-2
Chemical Formula
Mo
Molecular Weight
95.95 g/mol
Abbreviation
Mo

Description

Molybdenum (CAS 7439-98-7), commonly referenced by its symbol Mo, is a refractory transition metal sourced and traded as a primary alloying and catalytic material across industrial supply chains. In metallurgy and chemical processing, it functions as a high-performance strengthener in steel alloys and as a catalytically active component in refining and synthesis operations.

In petroleum refining, Mo-based catalysts are used in hydrodesulfurization units to remove sulfur from crude fractions, meeting fuel quality specifications for global distribution. Steel and superalloy manufacturers incorporate molybdenum to improve high-temperature strength and corrosion resistance in structural components, tooling, and aerospace parts for extreme environments.

In the chemical industry, molybdenum compounds derived from elemental Mo serve as precursors for oxidation and ammoxidation catalysts used in producing acrylonitrile and formaldehyde. Pigment producers also use molybdenum as a precursor for molybdate-based colorants applied in coatings and plastics, ensuring high durability and color stability in industrial applications.

Molybdenum is commercially available as powder, rod, sheet, wire, and sintered parts, with powder being the most common traded form for chemical and metallurgical processing. Standard grades include technical-grade and high-purity specifications, with purity levels typically ranging from 99.9% to 99.99% depending on specific end-use requirements.

Other Names (Synonyms)

metallic molybdenum|elemental molybdenum|element 42|42Mo|molybdenum atom|Molybdenum, metallic|MChVL|Molybdenum metallicum|Mo

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

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Physical Properties

Melting Point 2622 °C
Boiling Point ~4825 °C (approx)
Density 10.28 g/cm³
Flash Point -23 °C
Appearance Molybdenum is a silvery-white metal or dark gray or black powder with a metallic luster.
Color Gray
Form wire
Water Solubility Insoluble inwater. Soluble innitric acid andsulfuric acid. Slightly soluble inhydrochloric acid.
Refractive Index 2.81 (740 nm)
pH 9.2 (20°C in H2O)

Documentation

Safety & Handling Learn More

Danger
GHS02· Flammable GHS08· Health Hazard GHS07· Irritant

Hazard Statements

H225 Highly Flammable liquid and vapor
H228 Flammable solid
H315 Causes skin irritation
H319 Causes serious eye irritation
H335 May cause respiratory irritation
H361 Suspected of damaging fertility or the unborn child

Precautionary Statements

P203 Obtain, consult and follow expert instructions for use.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P240 Ground and bond container and receiving equipment.

Trade & Regulatory

HS Code 81029600
UN Number 3264
ADR Class 8
Packing Group III
WGK (Germany) 3
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