Molekula
De-Ionised Distilled Water
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
De-Ionised Distilled Water is high-purity water produced by distillation and de-ionisation, used in laboratories, pharmaceuticals, and industrial processes where impurities must be minimized. It has a CAS number of 7732-18-5, molecular formula H₂O, and a molecular weight of 18.02 g/mol. It is stored at ambient temperatures and carries the signal word Warning, with hazard statements H315, H319 and H335. Molekula supplies De-Ionised Distilled Water 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
In stock — same-day dispatch
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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5 L — £23.00 per pack ex VAT · £27.60 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 | Colourless Transparent Liquid |
| Chloride (Cl-) | ≤0.1 mg/l |
| Clarity | ≤1.0 FTU |
| Silica | ≤0.1 mg/l |
| Calcium (Ca) | ≤1.0 mg/l |
| Magnesium (Mg) | ≤0.05 mg/l |
| Sulfite | ≤0.1 mg/l |
| Sodium (Na) | ≤0.05 mg/l |
| Sulphates (SO4)(2-) | ≤0.1 mg/l |
| Fluoride (F-) | ≤0.1 mg/l |
| Calcium Carbonate (CaCO3) | ≤1.0 mg/l |
| TACC @ 37ºC | ≤1.0 cfu/ml |
| TACC @ 22ºC | ≤1.0 cfu/ml |
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 | 0 °C |
| Boiling Point | 99.97 °C |
| Density | 0.9950 g/cm³ at 25 °C |
| Solubility (other solvents) | Very soluble in ethanol, methanol, acetone |
| Vapour Pressure | 23.75 mmHg |
| Refractive Index | 1.333 |
Source: PubChem CID 962 (HSDB, Haz-Map)
Identification
| Property | Value |
|---|---|
| SKU | 34750941 |
| CAS Number | 7732-18-5 |
| IUPAC Name | oxidane |
| EC Number | 231-791-2 |
| Molecular Formula | H2O |
| Molecular Weight | 18.02 |
| Exact Mass | 18.0106 |
| SMILES | O |
| InChIKey | XLYOFNOQVPJJNP-UHFFFAOYSA-N |
| InChI | InChI=1S/H2O/h1H2 |
| PubChem CID | 962 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 2201.90.0000 |
| Tariff Code | 2853901000 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- P271 Use only outdoors or in a well-ventilated area
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+P352 IF ON SKIN: Wash with soap and water
- P304+P340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+P351+P338 IF IN EYES: Rinse continuously with water for several minutes. Remove contact lenses if present and easy to do, continue rinsing
- P321 Specific treatment (see supplemental first aid instructions on this label)
- P403+P233 Store in a well-ventilated place. Keep container tightly closed
- P405 Store locked up
- P501 Dispose of contents/container to an approved waste disposal plant
Documents
Safety Data Sheets (SDS)
Available in English, German, Spanish, French, Italian, Portuguese, Arabic, Dutch.
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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- aqua
- Dihydrogen oxide
- Distilled water
- oxidane
- Purified water
- Sterile water
- water
- Water vapor
- Water, deionized
- Water, mineral
Frequently asked questions
What is de-ionised distilled water used for?
It is commonly used in laboratory applications, pharmaceutical preparations, and industrial processes where high-purity water is required to avoid contamination.
What is the chemical formula and molecular weight of de-ionised distilled water?
The formula is H2O with a molecular weight of 18.02 g/mol.
How should de-ionised distilled water be stored?
It should be stored at ambient temperature, away from direct sunlight and contaminants.
What grade of de-ionised distilled water does Molekula supply?
Molekula supplies reagent-grade de-ionised distilled water suitable for laboratory and high-purity applications.
Can Molekula supply de-ionised distilled water in bulk?
Yes, Molekula can supply de-ionised distilled water in bulk quantities upon request.
What documentation comes with an order of de-ionised distilled water?
Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS) upon request.
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.