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Deuterium oxide

99.9 atom % D

Heavy water, Water-d2
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level

isotopic purity

99.9 atom % D




NMR: suitable
bio NMR: suitable


101.4 °C (lit.)


3.8 °C (lit.)

SMILES string




InChI key


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General description

Deuterium oxide, a deuterated solvent, is a standard prurity solvent for NMR (Nuclear Magnetic Resonance) analyses. 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.


Deuterium oxide may be used:
  • To prepare trifluoroacetic acid-d by reacting with trifluoroacetic anhydride.
  • As a deuteration agent for primary and secondary alcohols at the β-carbon position via H/D exchange reaction in the presence of ruthenium catalyst.
  • Along with hexamethyldisilane as a deuterium transfer reagent for alkynes to form (E)-1,2-dideuterioalkenes in the presence of a palladium complex.

Deuterium oxide (Heavy water, Water-d2, D2O) has been used as solvent for the dissolution of internal standard and sample during quantification experiments by NMR. It has been used for the dissolution of tris(2,2′-bipyridyl)dichlororuthenium(II) hexahydrate Ru(bpy)3.4


1 L in glass bottle
1, 1.107, 4 kg in glass bottle
10×0.6, 10×0.75, 10×1 mL in ampule
10, 25, 100, 250, 500 g in glass bottle

Storage Class Code

10 - Combustible liquids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. How should I store Product 151882, Deuterium oxide, to preserve its purity?

    According to our MSDS, deuterium oxide is classified as hygroscopic and should be stored under an inert gas like nitrogen, to prevent hydrogenated water uptake.

  4. I don't have the ability to store Product 151882, Deuterium oxide, under nitrogen to prevent H2O uptake. Is there another way that I can work with D20 in order to preserve its purity?

    You may be interested in our ampulized deuterium oxide products: 521965 (10x0.6mL), 441376 (10x0.75mL) or 269794 (10x1mL). These products are ideal for one time use applications, like as an NMR solvent, because there is decreased chance of water uptake during storage.

  5. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  6. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  7. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

Muidh Alheshibri et al.
Journal of colloid and interface science, 537, 123-131 (2018-11-14)
Robust methods for differentiating long-lived nanobubbles from other nanoparticles are required. Evaluation of the density and compressibility of nanoparticles should enable nanobubbles to be differentiated from other nanoparticles, although the response of nanobubbles to pressure can be strongly influenced by
Ruthenium-Catalyzed Regioselective Deuteration of Alcohols at the ?-Carbon Position with Deuterium Oxide.
Tse SKS, et al.
Chemistry?A European Journal , 17(49), 13918-13925 (2011)
Useful NMR solvent mixture for polyesters: Trifluoroacetic acid-d/chloroform-d.
Hariharan R and Pinkus AG.
Polym. Bull., 30(1), 91-95 (1993)
Ling Rong Wong et al.
Biomedicines, 8(12) (2020-12-16)
Accumulating evidence suggests that disruptions in brain energy metabolism may be a key player in the pathogenesis of Alzheimer's disease (AD). Pioglitazone (PIO) has been found to exert beneficial effects on metabolic dysfunction in many AD preclinical studies. However, limited
Lixue Shi et al.
Nature methods, 17(8), 844-851 (2020-07-01)
Understanding metabolism is indispensable in unraveling the mechanistic basis of many physiological and pathological processes. However, in situ metabolic imaging tools are still lacking. Here we introduce a framework for mid-infrared (MIR) metabolic imaging by coupling the emerging high-information-throughput MIR


NMR Deuterated Solvent Properties Reference Chart

Use this reference table to find the coupling values and chemical shifts of our NMR (deuterated) solvents. Melting and boiling points, molecular weight, density, and CAS number are also listed.

Solid-state NMR on Larger Biomolecules

Solid-state NMR on Larger Biomolecules;

Related Content

Nuclear Magnetic Resonance (NMR)

NMR spectroscopy is an analytic technique to determine molecular structure, chemical composition and purity. NMR detects the energy absorbed due to nuclear spin states in the presence of a strong magnetic field.

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