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329878

Sigma-Aldrich

Water-18O

(for PET), 97 atom % 18O

Synonym(s):

18O Water

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About This Item

Linear Formula:
H218O
CAS Number:
14314-42-2
Molecular Weight:
20.02
MDL number:
MFCD00064503
UNSPSC Code:
12142200
PubChem Substance ID:
24859818
NACRES:
NA.12

description

Normalized with respect to hydrogen

Quality Level

200

isotopic purity

97 atom % 18O

form

liquid

technique(s)

PET imaging: suitable

bp

100 °C (lit.)

mp

0 °C (lit.)

density

1.11 g/mL at 20 °C (lit.)

compatibility

(for PET)

mass shift

M+2

SMILES string

[18OH2]

InChI

1S/H2O/h1H2/i1+2

InChI key

XLYOFNOQVPJJNP-NJFSPNSNSA-N

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General description

Water-18O is an isotopic analogue of water.

Application

Water-18O is an isotopically modified water, which is appropriate for PET applications.
It can also be used:
  • In paleoclimatology, hydrology, and plant ecology to determine soil stable oxygen isotope analysis of plant cellulose using δ18O.
  • To determine the diffusion of moisture into crystals using secondary ion mass spectrometry (SIMS).

Packaging

Packaged in septum-sealed serum bottles.
This product may be available from bulk stock and can be packaged on demand. For information on pricing, availability and packaging, please contact Stable Isotopes Customer Service.

Storage Class Code

10 - Combustible liquids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MBBD2487
MBBD2057
MBBD1374
MBBC9995
MBBC9004

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Xueyan Cao et al.
Food chemistry, 276, 266-273 (2018-11-10)
Milk glycoproteins are crucial nutrients with a variety of functions. However, whey N-glycoproteomes in human and bovine milks have not been characterized during lactation. Herein, using lectin enrichment and liquid chromatography tandem mass spectrometry, 68, 58, 100, and 98 N-glycoproteins
Diffusion of Water Species in Yttria-Stabilized Zirconia
Duong T, et al.
Journal of the American Chemical Society, 92(11), 2731-2737 (2009)
Separating soil and leaf water 18O isotopic signals in plant stem cellulose
Sternberg, Leonel da Silveira Lobo and Anderson, William T and Morrison, Kanema
Geochimica et Cosmochimica Acta, 67(14), 2561-2566 (2003)
Elizabeth A Rettedal et al.
MicrobiologyOpen, 4(2), 208-219 (2015-02-05)
Current limitations in culture-based methods have lead to a reliance on culture-independent approaches, based principally on the comparative analysis of primary semantides such as ribosomal gene sequences. DNA can be remarkably stable in some environments, so its presence does not
Qingfei Zheng et al.
Nature communications, 11(1), 3241-3241 (2020-06-28)
Protein arginine deiminase 4 (PAD4) facilitates the post-translational citrullination of the core histones H3 and H4. While the precise epigenetic function of this modification has not been resolved, it has been shown to associate with general chromatin decompaction and compete
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Articles

Tools for Measuring Energy Expenditure

By first labeling molecular oxygen and then body water with 18O in a rat, Lifson measured the 18O abundance in expired CO2 and found the oxygens in CO2 exchanged with the oxygen in water. Indeed, these two oxygen containing species were in rapid isotopic equilibrium due to the actions of what we now know is carbonic anhydrase (Lifson, 1966)

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