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332089

Sigma-Aldrich

Water-18O

10 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:
12352303
PubChem Substance ID:
24860023
NACRES:
NA.12

description

Normalized with respect to hydrogen

isotopic purity

10 atom % 18O

form

liquid

mol wt

18.22 by atom % calculation (10 atom % 18O)

bp

100 °C (lit.)

mp

0 °C (lit.)

density

1.11 g/mL at 20 °C (lit.)

mass shift

M+2

SMILES string

[18OH2]

InChI

1S/H2O/h1H2/i1+2

InChI key

XLYOFNOQVPJJNP-NJFSPNSNSA-N

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Packaging

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
MBBC9131
MBBC9132
MBBC9130
MBBC9129
MBBC4432

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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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