Tungsten

CAS 7440-33-7WMetal & Ceramic Science

Tungsten (W, CAS: 7440-33-7) is a dense, greyish-white metal known for its exceptionally high melting point and tensile strength. Supplied by Tech Serve Solutions as a wire with a minimum purity of 99.9%, it finds critical applications in high-temperature environments, electrical components, and specialised alloys. Its unique properties make it indispensable in demanding industrial and scientific fields.

IUPAC: W

Email us

Tungsten (W) — chemical element, CAS 7440-33-7; Materials Science, fine chemical supplied by Tech Serve Solutions

Materials ScienceMetal and Ceramic ScienceMetalsTungsten

01 /Applications

High-Temperature Applications

Due to its extremely high melting point (3410 °C), tungsten is ideal for use in furnace components, heating elements, and refractory materials exposed to intense heat.

Electrical Components

Tungsten's electrical properties, including high conductivity and resistance, make it suitable for filaments in incandescent lamps, electrodes, and electrical contacts.

Alloy Development

It is a key component in various alloys, such as tungsten carbide, to enhance hardness, wear resistance, and strength in cutting tools, mining equipment, and wear-resistant parts.

Scientific Research

Its inertness and high density find use in specialised laboratory equipment, targets for X-ray tubes, and counterweights.

02 /Properties

Molecular weight	183.84
Empirical formula	W
Assay	≥99.9% trace metals basis
Form	wire
Boiling point	5660 °C(lit.)
Density	19.3 g/mL at 25 °C(lit.)
Melting point	3410 °C(lit.)

03 /Safety & handling

GHS hazard pictogram: Flammable (GHS02) — Flammable

GHS hazard pictogram: Harmful / irritant (GHS07) — Harmful / irritant

Danger

Hazard statements

H228Flammable solid
H315Causes skin irritation
H319Causes serious eye irritation

Precautionary statements

P210Keep away from heat, sparks and open flames. No smoking
P305IF IN EYES

Protective equipment	dust mask type N95 (US), Eyeshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges
Water hazard class (WGK, DE)	3
Hazard codes (EU)	F,Xi
Risk statements (R)	11-36/38
Safety statements (S)	6-26-36

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

7440-33-7

MDL number

MFCD00011461

05 /Additional specifications

Diam	1.0 mm
Resistivity	4.9 μΩ-cm, 20°C
Thickness	0.05 mm

06 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

07 /Frequently asked questions

What is Tungsten (CAS 7440-33-7) used for?

Tungsten (W) is primarily used in high-temperature applications like furnace parts and heating elements, electrical components such as filaments and electrodes, and in alloys like tungsten carbide for enhanced hardness and wear resistance in tools and equipment. It also finds applications in scientific research and specialised laboratory equipment.

What is the CAS number and formula for Tungsten?

The CAS number for Tungsten is 7440-33-7, and its chemical formula is W.

What grade and purity does Tech Serve Solutions supply for Tungsten?

Tech Serve Solutions supplies Tungsten with an assay of ≥99.9% on a trace metals basis.

How is Tungsten supplied and exported?

Tungsten is supplied as wire. Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals and materials.

What are the safety considerations when handling Tungsten?

Tungsten wire is flammable (H228) and can cause skin (H315) and serious eye irritation (H319). Ensure proper ventilation and use appropriate personal protective equipment, including eye protection, gloves, and a suitable respirator, as indicated by the safety data.