Molekula
Type I water
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
Type I water is ultra-pure deionized water, free from ionic contaminants, organic impurities, and particulate matter, used in high-precision applications like analytical chemistry, pharmaceutical manufacturing, and laboratory testing. It meets stringent purity standards (ASTM Type I or equivalent) with a resistivity of 18.2 MΩ·cm at 25°C. Molekula supplies Type I 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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 |
|---|---|
| Bacteria | ≤0.1 |
| pH | 6.0 - 8.0 |
| Chlorides | ≤1 ppm |
| Conductivity | ≤0.0555 μS/cm |
| Endotoxin | ≥0.25 EY/ml |
| TOC | ≤50 |
| Silica | ≤3 |
| Sodium (Na) | ≤1 ppm |
| Resistivity | ≥18 MΩ |
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 | 90035519 |
| 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
-
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.
Synonyms
- aqua
- Dihydrogen oxide
- Distilled water
- oxidane
- Purified water
- Sterile water
- water
- Water vapor
- Water, deionized
- Water, mineral
Frequently asked questions
What is Type I water (ultrapure water) commonly used for in laboratories?
Type I water is primarily used for high-purity applications such as HPLC, LC-MS, PCR, and cell culture, where even trace contaminants can interfere with results.
What is the chemical formula and molecular weight of Type I water?
The chemical formula is **H₂O**, and the molecular weight is **18.02 g/mol** (calculated from the atomic weights of hydrogen and oxygen).
How should Type I water be stored to maintain its purity?
Store in a clean, dedicated container at **ambient temperature**, away from direct sunlight, chemicals, or potential sources of contamination.
What purity grade is Molekula’s Type I water certified to?
Molekula’s Type I water meets **ASTM Type I** and **ISO 3696:1987 Grade 1** standards, with resistivity ≥18.2 MΩ·cm at 25°C.
Can Molekula supply Type I water in bulk (e.g., 50L+ containers or via tanker) for industrial or large-scale lab use?
Yes, we offer Type I water in bulk quantities, including **50L carboys, 275L drums, or custom tanker deliveries**, depending on your requirements.
What documentation is provided with a Type I water order?
Each order includes a **Certificate of Analysis (CoA)** detailing resistivity, TOC levels, and microbial testing, along with an **MSDS/SDS** for safety compliance.
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.