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435767

Deuterium oxide

99 atom % D

Synonym(s):

Heavy water, Water-d2

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About This Item

Linear Formula:
D2O
CAS Number:
7789-20-0
Molecular Weight:
20.03
NACRES:
NA.21
PubChem Substance ID:
24867256
UNSPSC Code:
12142201
EC Number:
232-148-9
MDL number:
MFCD00044636
Technique(s):
NMR: suitable, bio NMR: suitable
Bp:
101.4 °C (lit.)
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isotopic purity

99 atom % D

form

liquid

technique(s)

NMR: suitable, bio NMR: suitable

bp

101.4 °C (lit.)

mp

3.8 °C (lit.)

SMILES string

[2H]O[2H]

InChI

1S/H2O/h1H2/i/hD2

InChI key

XLYOFNOQVPJJNP-ZSJDYOACSA-N

General description

Deuterium oxide (D2O) also known as heavy water is deuterated water. It is safe and inexpensive source of deuterium (D) for the D/H exchange reactions. The equilibrium constant for the exchange of deuterium between hydrogen (H) and D2O molecules has been determined. Reports suggest that gelatin gels prepared in D2O show higher rigidity than gels prepared in water. The influence of temperature on the heat capacity of deuterium in crystalline and liquid state was studied calorimetrically and its melting point, enthalpy and entropy of fusion were determined. Its utility as a potential therapeutic agent in treating human pancreatic cancer has been studied.

Application

Deuterium oxide may be used in the following processes:
  • As an NMR solvent.
  • Preparation of β-deuterated alcohols.
  • For the adsorption of neutrons in atomic reactors.
  • Deuterium transfer agent in combination with hexamethyldisilane in the preparation of 1,2-dideuterioalkenes from alkynes.

Other Notes

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Storage Class

10 - Combustible liquids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

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