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CAS 7440-39-3

CAS 7440-39-3 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 7440-39-3
CAS 7440-39-3PubChem CID 5355457

Barium

Barium is a silvery-white metal which exists in nature only in ores containing mixtures of elements. It combines with other chemicals such as sulfur or carbon and oxygen to form barium compounds. Barium compounds are used by the oil and gas industries to make drilling muds. Drilling muds make it easier to drill through rock by keeping the drill bit lubricated. They are also used to make paint, bricks, ceramics, glass, and rubber. Barium sulfate is sometimes used by doctors to perform medical tests and to take x-rays of the gastrointestinal tract. — Agency for Toxic Substances and Disease Registry (ATSDR)

IUPAC name
barium
Molecular formula
Ba
Molecular weight
137.33 g/mol
Exact mass
137.905247 Da
Topological polar surface area
0.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
0
Covalent units
1
Defined stereocentres
0

Also known as

bariobaryumBarium, elementalBA24GP945V5TCHEBI:32594CHEBI:32595barium(II) cation
16 more reported names
barium(2+) ionRefChem:560942231-149-1Barium metalbarium atombarium(0)Bario; BaryumHSDB 4481Barium Standard: Ba @ 10 microg/mL in 2% HNO3Barium Standard: Ba+2 @ 1000 microg/mL in H2OEINECS 231-149-1UN1400Barium Standard: Ba @ 1000 microg/mL in 5% HNO3Barium Standard: Ba @ 10000 microg/mL in 5% HNO3Barium AA Standard: Ba @ 1000 microg/mL in 5% HNO3Barium Standard: Ba @ 1000 microg/g in Hydrocarbon Oil
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External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 7440-39-3

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How CAS 7440-39-3 is used on this site

CAS 7440-39-3 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 7440-39-3 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.