Ar
39.9 g/mol
Industrial ChemicalWarning
ARGON
CAS7440-37-1EC231-147-0
Category
Industrial Chemical
Compound Class
n.a
Primary Use
Inert gas for welding and metal refining
Argon is a colorless, odorless, noncombustible inert gas that is heavier than air and can cause asphyxiation by displacing oxygen. It is primarily significant as an inert shielding gas in welding and metal refining processes, where it prevents oxidation of hot metals.
Inert gas for arc weldingBlanketing agent in metal refiningInert gas in electric lamps
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
ReferenceSame Category
Boron
CAS7440-42-8
Industrial chemical for glass and borate production
ReferenceSame Category
Carbon
CAS7440-44-0
Carbon black pigment and reducing agent
ReferenceSame Category
Chromium
CAS7440-47-3
Steel and alloys production
ReferenceSame Category
Gold
CAS7440-57-5
Jewelry making and electroplating
Safety Reference
Warning
H280Contains gas under pressure; may explode if heated
H281Contains refrigerated gas; may cause cryogenic burns or injury
Regulatory Compliance1
- CN Catalogue of Hazardous ChemicalsCNRegulation
Customs Tariff Classification
The international HS code for ARGON (CAS 7440-37-1) is 2804.21.
HS code (international, 6-digit)
2804.21
EU CN code (8-digit)
2804 21 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
argon
InChIKey
XKRFYHLGVUSROY-UHFFFAOYSA-N
SMILES
[Ar]
Synonyms (25)
- ARGON
- E-938
- Q696
- (~36~Ar)Argon
- (~40~Ar)argon
- (~41~Ar)Argon
- ARGON [MART.]
- Ar (element)
- Argon (atomic)
- Argon 40
- Argon element
- Argon, Elemental
- Argon, compressed
- Atomic Argon
- Element Argon
- Element-Ar
- INS NO.938
- KHLADON R 740
- [Ar]
- argon atom
- argon(0)
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