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Helium-3

Helium-3 structure

CAS No:
14762-55-1
Formula:
He
Chemical Name:
Helium-3
Synonyms:
Helium,isotope of mass 3;Helium-3;3He;He 3
Categories:
Organic Chemistry > Free Radicals

Description

Helium-3 atom is the stable isotope of helium with relative atomic mass 3.016029. The least abundant (0.000137 atom percent) isotope of naturally occurring helium. It contains a helion.|Helium He-3 is under investigation in clinical trial NCT00846014 (Asthma Exacerbation and Helium-3 MRI).

Helium-3 Basic Attributes

Molecular Weight：

2.993602

Exact Mass：

3.0160293220

EC Number：

238-822-9

UNII：

I83W8ELB18

Characteristics

Density：

0.041 g/cm³

Melting Point：

-272.14°C

Boiling Point：

-269.95 °C

Safety Information

Transport codes：

UN1046 - class 2 - Helium, compressed

wgk germany：

RTECS Number：

MH6520000

GHS Classification：

|Warning|H280 (100%): Contains gas under pressure; may explode if heated [Warning Gases under pressure]|P282, P315, P336, P403, and P410+P403|Aggregated GHS information provided by 83 companies from 2 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Drug Information

MeSH Entry Terms：

3He isotope

Computed Properties

Molecular Weight:3.0160293220
Exact Mass:3.0160293220
Monoisotopic Mass:3.0160293220
Heavy Atom Count:1
Isotope Atom Count:1
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes