Molekula
Deuterium oxide 99.9%
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Deuterium oxide (D2O), also called heavy water, is a stable isotope of water where hydrogen atoms are replaced with deuterium. It is primarily used in nuclear reactors as a neutron moderator, in NMR spectroscopy, and as a solvent in isotopic research. This ultra-pure 99.9% deuterium oxide has a CAS number of 7789-20-0, a molecular weight of 20.03, and requires ambient storage with no signal word warnings. Molekula supplies deuterium oxide 99.9% from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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500 mL — £2,100.00 per pack ex VAT · £2,520.00 inc. VAT
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20 g — £155.00 per pack ex VAT · £186.00 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | clear colourless Liquid |
| D-enrichment | ≥99.75% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless liquid |
| Odour | Odorless |
| Melting Point | 3.81 °C; triple point 3.82 °C |
| Boiling Point | 101.42 °C |
| Vapour Pressure | 20.6 mmHg at 25 °C |
| Refractive Index | 1.3283 |
Source: PubChem CID 24602 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 90029872 |
| CAS Number | 7789-20-0 |
| IUPAC Name | deuterated water |
| EC Number | 232-148-9 |
| Molecular Formula | D2O |
| Molecular Weight | 20.03 |
| Exact Mass | 20.0231 |
| SMILES | [2H]O[2H] |
| InChIKey | XLYOFNOQVPJJNP-ZSJDYOACSA-N |
| InChI | InChI=1S/H2O/h1H2/i/hD2 |
| PubChem CID | 24602 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 2845.10.0000 |
| Tariff Code | 2845100000 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, English (US), French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Deuterated water
- Dideuterium oxide
- Heavy water
- Heavy water (D2O)
- Heavy water-d2
- Oxide, Deuterium
- Water-d sub(2)
- Water-d2
- Water, heavy (D2-O)
- Water(sup 2)-H2
Frequently asked questions
What is deuterium oxide (D₂O) 99.9% used for?
Deuterium oxide (heavy water) is primarily used in nuclear reactors as a neutron moderator, in NMR spectroscopy as a solvent, and in isotopic research for stable isotope labeling.
What is the chemical formula and molecular weight of deuterium oxide?
The chemical formula is **D₂O** (deuterium oxide), and the molecular weight is **20.03 g/mol**.
How should deuterium oxide 99.9% be stored?
Store at **ambient temperature** in a tightly sealed container to prevent moisture absorption or contamination.
What purity grades of deuterium oxide does Molekula supply?
Molekula supplies deuterium oxide at **99.9% isotopic purity**—higher grades may be available upon request.
Can Molekula supply deuterium oxide in bulk quantities?
Yes, bulk quantities of deuterium oxide are available; please contact our sales team for custom packaging and pricing.
What documentation comes with a deuterium oxide order?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a packing slip with batch-specific details.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.