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CAS 7440-37-1

CAS 7440-37-1 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 7440-37-1
CAS 7440-37-1PubChem CID 23968

Argon

Argon appears as a colorless odorless noncombustible gas. Heavier than air and can asphyxiate by displacement of air. Exposure of the container to prolonged heat or fire can cause it to rupture violently and rocket. If liquefied, contact of the very cold liquid with water may cause violent boiling. If the water is hot, there is the possibility that a liquid "superheat" explosion may occur. Contacts with water in a closed container may cause dangerous pressure to build. — CAMEO Chemicals

IUPAC name
argon
Molecular formula
Ar
Molecular weight
39.9 g/mol
Exact mass
39.96238312 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

Argon-40Argon, Elemental67XQY1V3KHArgon 40ARKHLADON R 740INS NO.938E-938
16 more reported names
INS-938R 740RefChem:113993231-147-0argon atomArgon36argon(0)E938Argon, >=99.998%EINECS 231-147-0UN1006UN1951UNII-67XQY1V3KHArgon elementAtomic ArgonElement Argon
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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 7440-37-1

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How CAS 7440-37-1 is used on this site

CAS 7440-37-1 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 7440-37-1 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.