Selenium

CAS 7782-49-2SeCatalysis & Inorganic

Selenium (CAS: 7782-49-2, Formula: Se, Molar Mass: 78.96) is a non-metal element supplied by Tech Serve Solutions as a gray powder with a minimum assay of ≥99.5% on a trace metals basis. It finds significant utility in various industrial and scientific fields, including alternative energy, catalysis, chemical synthesis, and electronic materials. Its unique properties make it a valuable component in the development of advanced materials and technologies.

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Selenium (Se) — chemical element, CAS 7782-49-2; Chemistry, fine chemical supplied by Tech Serve Solutions

Alternative EnergyChemical SynthesisDopantsElectronic ChemicalsMaterials ScienceMetal and Ceramic ScienceMetalsMicro/NanoElectronicsPhosphor MaterialsPure Elements

01 /Applications

Alternative Energy

Selenium is used in the development of photovoltaic cells and other renewable energy technologies due to its semiconducting properties. Its ability to convert light into electricity is crucial for solar energy applications.

Catalysis and Chemical Synthesis

This element serves as a catalyst in various chemical reactions and as a reagent in organic synthesis. It plays a role in producing complex organic molecules and facilitating specific chemical transformations.

Electronic Materials and Dopants

Selenium is employed as a dopant in semiconductors to modify their electrical properties. It is also used in the manufacturing of electronic components, including rectifiers and photocells.

Thermoelectric Materials

As a component in thermoelectric precursors, selenium is vital for creating materials that convert heat into electricity and vice versa. This is important for waste heat recovery and solid-state cooling.

Phosphor Materials

Selenium compounds are utilised in the production of phosphors for lighting and display technologies. These materials emit light when excited by radiation, contributing to various visual applications.

02 /Properties

Molecular weight	78.96
Empirical formula	Se
Assay	≥99.5% trace metals basis
Form	powder
Boiling point	684.9 °C(lit.)
Density	4.81 g/mL at 25 °C(lit.)
Particle size	−100 mesh
Melting point	217 °C(lit.)

03 /Safety & handling

GHS hazard pictogram: Toxic (GHS06) — Toxic

GHS hazard pictogram: Health hazard (GHS08) — Health hazard

Danger

Hazard statements

H301Toxic if swallowed
H331Toxic if inhaled
H373May cause damage to organs through prolonged exposure
H413May cause long-lasting harmful effects to aquatic life

Precautionary statements

P261Avoid breathing dust, fume, gas or vapours
P301IF SWALLOWED
P311Call a POISON CENTER or doctor

Protective equipment	Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges
Transport (UN / ADR)	UN 3077 9 / PGIII
Water hazard class (WGK, DE)	2
Hazard codes (EU)	T
Risk statements (R)	23/25-33-53
Safety statements (S)	20/21-28-45-61

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

04 /Identifiers & registry

CAS number

7782-49-2

MDL number

MFCD00134090

PubChem substance

24852584

05 /Additional specifications

Description	gray
Resistivity	1.2 μΩ-cm, 0°C

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 Selenium used for?

Selenium (CAS: 7782-49-2) is used in alternative energy, catalysis, chemical synthesis, as a dopant in electronics, and in thermoelectric and phosphor materials.

What are the CAS number and formula for Selenium?

The CAS number for Selenium is 7782-49-2, and its chemical formula is Se.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies Selenium with an assay of ≥99.5% on a trace metals basis. We do not represent this product as USP, BP, or EP grade.

How should Selenium be handled safely?

Selenium is toxic if swallowed or inhaled and may cause organ damage through prolonged exposure. Handle with appropriate personal protective equipment, including eyeshields, face shields, gloves, and P2 respirator cartridges, in a well-ventilated area. Avoid dust formation and breathing dust.

How is Selenium shipped and exported?

Selenium is shipped as UN 3077, Hazard Class 9, Packing Group III. Tech Serve Solutions is an experienced global supplier and exporter of fine chemicals.