Selenium (CAS 7782-49-2) Sigma-Aldrich

Selenium molecular structure — Molecular structure

The Sigma-Aldrich catalog lists 16 grades and pack sizes of Selenium (CAS 7782-49-2). Pick the code you need and request a quote for price and lead time from Klar Chem.

CAS	7782-49-2
Molecular formula	Se
Molecular weight	78.97 g/mol
IUPAC name	selenium
Synonyms	Elemental selenium · Selenium elemental · Vandex · Selen · Gray selenium · Selenium base

Safety & Hazards (GHS) Danger

Acute toxic

Health hazard

H301 Toxic if swallowed
H331 Toxic if inhaled
H373 May causes damage to organs through prolonged or repeated exposure
H413 May cause long lasting harmful effects to aquatic life

⚠️ For information only (source: EU CLP harmonised classification and ECHA notifications, via PubChem); not a substitute for the official Safety Data Sheet (SDS).

Catalog codes and grades

Brand	Product / grade	Code
Sigma	SELENIUM, FOIL 25X25MM, THICKNESS 3MM	GF66395212-1EA	Request Quote
Sigma	SELENIUM, LUMP, MAX. LUMP SIZE 3MM, WEI	GF45431647-1EA GF78955532-1EA	Request Quote
Sigma	SELENIUM, PELLETS, <5 MM, >=99.99% TRACE	209643-250G 209643-50G	Request Quote
Sigma	SELENIUM, PELLETS, <5 MM, >=99.999% TRA	204307-100G 204307-20G 204307-5G	Request Quote
Sigma	SELENIUM, POWDER, -100 MESH, 99.5+%	209651-250G 209651-50G	Request Quote
Sigma	SELENIUM, POWDER, -100 MESH, 99.99% MET	229865-100G 229865-20G 229865-5G	Request Quote
Sigma	SELENIUM, POWDER, MAX. PARTICLE SIZE 25	GF33939849-1EA GF59784575-1EA GF73071514-1EA	Request Quote

For information only; specifications and availability are confirmed at quotation. Prices are not listed.