MilliporeSigma
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602892

Sigma-Aldrich

Oxygen-18O2

99 atom % 18O, 99% (CP)

Linear Formula:
18O2
CAS Number:
Molecular Weight:
36.00
MDL number:
PubChem Substance ID:
NACRES:
NA.12

vapor density

1.11 (vs air)

Quality Level

isotopic purity

99 atom % 18O

assay

99% (CP)

form

gas

technique(s)

PET imaging: suitable

bp

−183 °C (lit.)

mp

−218 °C (lit.)

mass shift

M+4

SMILES string

[18O]=[18O]

InChI

1S/O2/c1-2/i1+2,2+2

InChI key

MYMOFIZGZYHOMD-XPULMUKRSA-N

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General description

Oxygen-18O2 is a naturally occurring stable isotope of oxygen. Natural abundance of 18O2 containing at least 99 atom % O-18.

Application

18O2 isotopic labelling was employed, in conjunction with time-of-flight secondary ion mass spectrometry, to characterize and elucidate the parts of the degradation mechanisms induced by molecular oxygen. Using 18O2 as a label, it is possible to study collagen degradation with this non-reutilized label and so avoid the large errors that are introduced by the recycling of other labels.
Oxygen-18O2 can be used to study the kinetic and functional analyses in photosynthesis research. It is used to estimate the role of oxygen in the vitamin-K dependent carboxylation reaction. Also used to measure the amount of oxygen produced by the etching a quartz tube with SF6 plasma.

Packaging

500 mL in Sure-Pac™
1 L quantity is packaged in a 450 mL carbon steel lecture bottle with brass CGA 110/180 valve. Nominal gas pressure at 21ºC is 20 psig for 1 L. This pressure is slightly above atmospheric pressure. Care must be taken when extracting this product from the cylinder.
All gas volumes are quoted at Standard Temperature and Pressure (STP) and not at Normal Temperature and Pressure (NTP). One STP Liter is 7.7% more gas than one NTP Liter.

Recommended products

Brass hose adapter Z146811 or brass body mini gas regulator Z513539 is recommended for 500 mL Sure/Pac cylinder (U.S only). For 1 L cylinder, either stainless steel control valve Z146951 or Z187224 is recommended.
PTFE sealing washers GCA inlet size 180 Z146994
PTFE sealing washers CGA inlet size 110 Z146986

Pictograms

Flame over circleGas cylinder

Signal Word

Danger

Hazard Statements

Hazard Classifications

Ox. Gas 1 - Press. Gas Compr. Gas

Storage Class Code

2A - Gases

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

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