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Molybdenum

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

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. Contact us for supply of Molybdenum Request Quote

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

Physical Properties

Melting Point2622 °C
Boiling Point~4825 °C (approx)
Density10.28 g/cm³
Flash Point-23 °C
AppearanceMolybdenum is a silvery-white metal or dark gray or black powder with a metallic luster.
ColorGray
Formwire
Water SolubilityInsoluble inwater. Soluble innitric acid andsulfuric acid. Slightly soluble inhydrochloric acid.
Refractive Index2.81 (740 nm)
pH9.2 (20°C in H2O)

Safety & Handling

Danger
GHS02· FlammableGHS08· Health HazardGHS07· Irritant

Hazard Statements

H225Highly Flammable liquid and vapor
H228Flammable solid
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
H361Suspected of damaging fertility or the unborn child

Precautionary Statements

P203Obtain, consult and follow expert instructions for use.
P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233Keep container tightly closed.
P240Ground and bond container and receiving equipment.
P241Use explosion-proof equipment.
P242Use non-sparking tools.
P243Take action to prevent static discharges.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P271Use only outdoors or in a well-ventilated area.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P318IF exposed or concerned, get medical advice.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.
P378Use … for extinction.
P233Store in a well-ventilated place. Keep container tightly closed.
P235Store in a well-ventilated place. Keep cool.
P353IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code81029600
UN Number3264
ADR Class8
Packing GroupIII
WGK (Germany)3