609757
Deuterium oxide-18O
99 atom % D, 75 atom % 18O
Synonym(s):
Doubly Labeled Water, Heavy water-d2,18O, Unnormalized water-18O
About This Item
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isotopic purity
75 atom % 18O
99 atom % D
bp
101.4 °C (lit.)
mp
3.8 °C (lit.)
density
1.204 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
Storage Class Code
10 - Combustible liquids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
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Articles
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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