602892
Oxygen-18O2
99 atom % 18O, 99% (CP)
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About This Item
Fórmula lineal:
18O2
Número de CAS:
Peso molecular:
36.00
MDL number:
UNSPSC Code:
12142200
PubChem Substance ID:
NACRES:
NA.12
Productos recomendados
vapor density
1.11 (vs air)
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
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
PTFE sealing washers GCA inlet size 180 Z146994
PTFE sealing washers CGA inlet size 110 Z146986
hose barb
Referencia del producto
Descripción
Precios
regulator
Referencia del producto
Descripción
Precios
signalword
Danger
hcodes
Hazard Classifications
Ox. Gas 1 - Press. Gas Compr. Gas
Storage Class
2A - Gases
wgk_germany
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)
Certificados de análisis (COA)
Busque Certificados de análisis (COA) introduciendo el número de lote del producto. Los números de lote se encuentran en la etiqueta del producto después de las palabras «Lot» o «Batch»
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Journal of proteome research, 8(5), 2140-2143 (2009-04-03)
Enzyme-catalyzed 18O2-labeling offers a universal strategy for uniform labeling of all peptides from any kind of proteins, including post-translationally modified proteins. It is applicable to clinical samples with unrivaled sensitivity. This review discusses strengths and limitations, and advocates the separation
J A Molnar et al.
The Biochemical journal, 250(1), 71-76 (1988-02-15)
To explore the effects of growth retardation, caused by restricted protein intake, on collagen turnover in the whole skin, Sprague-Dawley rats (n = 20) were labelled with 18O2 and fed on either an adequate (18%) or a low (3%) lactalbumin
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