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Substance Name: Hydrogen
RN: 1333-74-0
UNII: 7YNJ3PO35Z
Note
- The first chemical element in the periodic table. It has the atomic symbol H, atomic number 1, and atomic weight [1.00784; 1.00811]. It exists, under normal conditions, as a colorless, odorless, tasteless, diatomic gas. Hydrogen ions are PROTONS. Besides the common H1 isotope, hydrogen exists as the stable isotope DEUTERIUM and the unstable, radioactive isotope TRITIUM.
Molecular Formula
- H2
Molecular Weight
- 2.0159
Classification Code
- Simple Asphyxiant
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Links to Resources
NLM Resources (File Locators)
Regulatory Agencies (Superlist Locators)
Other Resources (Internet Locators)
Names and Synonyms
Name of Substance
- Hydrogen
MeSH Heading
- Hydrogen
Synonyms
- EINECS 215-605-7
- H
- HSDB 5026
- Hydrogen
- Hydrogen atoms
- Molecular hydrogen
- Protium
- UNII-7YNJ3PO35Z
Systematic Name
- Hydrogen
Superlist Names
- Hydrogen
- Hydrogen, compressed
- Hydrogen, compressed [UN1049] [Flammable gas]
- Hydrogen, refrigerated liquid (cryogenic liquid)
- Hydrogen, refrigerated liquid (cryogenic liquid) [UN1966] [Flammable gas]
- UN1049
- UN1966
Registry Numbers
CAS Registry Number
- 1333-74-0
FDA UNII
- 7YNJ3PO35Z
Other Registry Number
- 725200-57-7
System Generated Number
- 0001333740