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608572

Sigma-Aldrich

Deuterium oxide-18O

99 atom % D, 95 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:
12352303
PubChem Substance ID:
329759253
NACRES:
NA.12

isotopic purity

95 atom % 18O
99 atom % D

Quality Level

200

bp

101.4 °C (lit.)

mp

3.8 °C (lit.)

density

1.216 g/mL at 25 °C

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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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

WGK 3

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
EW2043
EW1971
EW1640
EW0215
CR1648

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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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