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Description

Europium · CAS 7440-53-1 · Eu. UNII 444W947O8O. Boiling Point: 1529 °C @760 [mm Hg]; Melting Point: 822 °C; Density: 5.24 @25 °C.

Identification

CAS Registry Number	7440-53-1
PubChem CID	23981
Molecular formula	Eu
IUPAC name	europium
UNII (FDA)	444W947O8O

Computed Descriptors

Molecular Weight	151.964
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	0
Rotatable Bond Count	0
Exact Mass	152.92124
Monoisotopic Mass	152.92124
Topological Polar Surface Area	0
Heavy Atom Count	1
Formal Charge	0
Complexity	0

Physical & Chemical Properties

Boiling Point	1529 °C @760 [mm Hg]
Melting Point	822 °C
Density	5.24 @25 °C

Physical description & handling notes

• Crystals; [Merck Index] Soft, malleable, steel-grey metal; Powder form may ignite in air; [Hawley] Quickly oxidizes in air; Ignites in air at about 150-180 deg C; [Reference #1]

Regulatory Status

GHS notification summary	4.2% (2 / 48)

GHS Hazard Classification

GHS notification summary	4.2% (2 / 48)
Reported hazard statements	H228 (12.5%), H250 (83.3%), H260 (10.4%)

Documented Uses

• Source: Rare earth minerals; [Merck Index] Uses: nuclear control rods and color-TV phosphors (Europium-activated yttrium vanadate); Has been used in postage stamp glues so that electronic equipment can detect the phosphors in first-class mail; [Hawley] Used in doped plastic as a laser material; [Reference #1]
• Compound such as LUMINESCENT PROTEINS that cause or emit light (PHYSICAL LUMINESCENCE).

Synonyms

EUROPIUM; 7440-53-1; 444W947O8O; DTXSID3064695; Europium Metallicum; RefChem:58720; DTXCID0047660; 231-161-7; europium atom; EUROPIUM ION; MFCD00010992; europium metal; Europium Standard: Eu @ 1000 microg/mL in 5% HNO3; Europium Standard: Eu @ 10000 microg/mL in 5% HNO3; europio; Europium ingot

Frequently Asked Questions

What are the CAS number and molecular formula of Europium?

CAS 7440-53-1; molecular formula Eu; molecular weight — g/mol.

What other names is Europium known by?

EUROPIUM, 7440-53-1, 444W947O8O, DTXSID3064695, Europium Metallicum, RefChem:58720.

Is Europium classified as hazardous?

4.2% of GHS notifications report no hazard classification (2 of 48).

What are the key physical properties of Europium?

Boiling Point: 1529 °C @760 [mm Hg]; Melting Point: 822 °C; Density: 5.24 @25 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.