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608556

Sigma-Aldrich

Deuterium oxide-18O

5 atom % D, 5 atom % 18O

Synonym(s):

Doubly Labeled Water, Heavy water-d2,18O, Unnormalized water-18O

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About This Item

Linear Formula:
D218O
CAS Number:
14674-67-0
Molecular Weight:
22.03
MDL number:
MFCD00145527
UNSPSC Code:
12352200

isotopic purity

5 atom % 18O
5 atom % D

bp

101.4 °C (lit.)

mp

3.8 °C (lit.)

mass shift

M+4

SMILES string

[2H][18O][2H]

InChI

1S/H2O/h1H2/i1+2/hD2

InChI key

XLYOFNOQVPJJNP-LAPWFLRPSA-N

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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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