Deuteriumoxid

Bezeichnung:Deuteriumoxid

CAS-Nr7789-20-0

Englisch Name:DEUTERIUM OXIDE

CBNumberCB3736883

SummenformelD2O

Molgewicht20.03

MOL-Datei7789-20-0.mol

Synonyma

Deuteriumoxid

Deuteriumoxid physikalisch-chemischer Eigenschaften

Schmelzpunkt	3.8 °C(lit.)
Siedepunkt	101.4 °C
Dichte	1.107 g/mL at 25 °C
Dampfdruck	27.464hPa at 25℃
Brechungsindex	n20/D 1.328(lit.)
Flammpunkt	101.4°C
storage temp.	Store below +30°C.
pka	pK (25°) 14.955 (molarity scale); 16.653 (mole fraction scale): A. K. Covington et al., J. Phys. Chem. 70, 3820 (1966)
Aggregatzustand	Liquid
Farbe	Colorless
Relative polarity	0.991
PH	7 (H2O, 20℃)
Wasserlöslichkeit	Miscible with water.
Sensitive	Moisture Sensitive
Merck	14,2940
Dielectric constant	78.3（25℃）
Stabilität	Stable. Hygroscopic.
InChIKey	XLYOFNOQVPJJNP-ZSJDYOACSA-N
CAS Datenbank	7789-20-0(CAS DataBase Reference)
EPA chemische Informationen	Water-d2 (7789-20-0)

Sicherheit

S-Sätze:	24/25
WGK Germany	3
RTECS-Nr.	ZC0230000
F	3-10
TSCA	Yes
HS Code	2845 10 00
Giftige Stoffe Daten	7789-20-0(Hazardous Substances Data)

Gefahreninformationscode (GHS)

DEUTERIUM OXIDE Chemische Eigenschaften,Einsatz,Produktion Methoden

S-Sätze Betriebsanweisung:
S24/25:Berührung mit den Augen und der Haut vermeiden.
Chemische Eigenschaften
colourless liquid
Verwenden
Deuterium Oxide is used to prepare specifically labelled isotopologs of organic compounds.
Verwenden
To study chemical reaction rates and mechanisms. The cross section of deuterium for the capture of thermal neutrons is very low which makes it useful, in the form of heavy water, as a neutron moderator in nuclear reactors. Produces a considerable decrease in neutron energy per collision.
Verwenden
Deuterium oxide is used in nuclear magnetic resonance spectroscopy (NMR). It is also useful in the identification of labile hydrogens. As a source of deuterium, it is utilized for preparing specifically labeled isotopologs of organic compounds. It is often used as a substitute for water in the analysis of proteins in solution by using fourier transform infrared spectroscopy (FTIR). It finds application in certain types of nuclear reactors and in tritium production.
Definition
deuterium oxide: Water in which hydrogen atoms, 1H,are replaced by the heavier isotopedeuterium, 2H (symbol D). It is acolourless liquid, which forms hexagonalcrystals on freezing. Its physicalproperties differ from those of ‘normal’water; r.d. 1.105; m.p. 3.8°C; b.p.101.4°C. Deuterium oxide, D₂O, occursto a small extent (about 0.003%by weight) in natural water, fromwhich it can be separated by fractionaldistillation or by electrolysis. Itis useful in the nuclear industry becauseof its ability to reduce the energiesof fast neutrons to thermalenergies and because its absorptioncross-section is lower than that of hydrogenand consequently it does notappreciably reduce the neutron flux.In the laboratory it is used for labellingother molecules for studies ofreaction mechanisms. Water alsocontains the compound HDO.
Allgemeine Beschreibung
Deuterium oxide (D₂O) is a 100% isotopically enriched NMR (Nuclear Magnetic Resonance) solvent. It is widely employed in high resolution NMR studies. Various thermodynamic properties (such as intermolecular vibrational frequencies, energy of the hydrogen bond, free energy, enthalpy and entropy) of liquid deuterium oxide have been evaluated. Ionization constant for D₂O (in the range of 5-50°C), pK values (at 25°C) and enthalpy, entropy, heat capacity change (for the dissociation of D₂O) have been reported.
läuterung methode
Distil it from alkaline KMnO4 [de Giovanni & Zamenhof Biochem J 92 79 1963]. NOTE that D2O invariably contains tritiated water and will therefore be RADIOACTIVE; always check the radioactivity level of D2O in a scintillation counter before using.

DEUTERIUM OXIDE Upstream-Materialien And Downstream Produkte

Deuteriumoxid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

7789-20-0, DEUTERIUM OXIDE Verwandte Suche:

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