Molekula
Hydrazoic acid sodium salt
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
Sodium azide is an inorganic compound with the formula N3Na, widely used in chemical synthesis, airbag inflation systems, and as an antibacterial preservative in diagnostic and biological reagents. It is a highly reactive and hazardous material requiring careful handling. This chemical has a CAS number of 26628-22-8, a molecular weight of 65.01 g/mol, and is typically stored at ambient temperatures. It carries a "Danger" signal word due to its explosive and toxic properties. Molekula supplies sodium azide 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.
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500g — £88.90 per pack ex VAT · £106.68 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| Loss on Drying | ≤0.3% |
| Assay | ≥99.5% |
| Free Alkali | ≤0.3% |
| Heavy Metals (Pb) | ≤10 ppm |
| Water insoluble matter | ≤0.03% |
| Identification (RAMAN) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | II |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless hexagonal crystals |
| Melting Point | 275 °C (decomp) |
| Density | 1.85 (relative, water = 1) |
| Solubility (other solvents) | Highly soluble in water. Rapidly converted to hydrazoic acid ... Solubility in water: 40.16% at 10 °C; 41.7% at 17 °C |
| Vapour Pressure | 1 Pa at 20 °C |
Source: PubChem CID 33557 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 90037766 |
| CAS Number | 26628-22-8 |
| IUPAC Name | sodium azide |
| EC Number | 247-852-1 |
| Molecular Formula | N3Na |
| Molecular Weight | 65.01 |
| Exact Mass | 64.999 |
| SMILES | [N-]=[N+]=[N-].[Na+] |
| InChIKey | PXIPVTKHYLBLMZ-UHFFFAOYSA-N |
| InChI | InChI=1S/N3.Na/c1-3-2;/q-1;+1 |
| PubChem CID | 33557 |
| UN Number | UN1687 |
| REACH Code | Y106 |
| TSCA Listed | Yes |
| HTS Code | 2850.00.5000 |
| Tariff Code | 2850006010 |
Safety & GHS
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Toxic
GHS06
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Serious Health Hazard
GHS08
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Hazardous to the Environment
GHS09
Hazard statements
- EUH032 Contact with acids liberates very toxic gas
- H300 +H310 + H330 Fatal if swallowed, in contact with skin or if inhaled
- H373 May cause damage to organs through prolonged or repeated exposure
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P250 Do not subject to grinding/shock/friction
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P310 Immediately call a POISON CENTER or doctor/physician
Documents
Safety Data Sheets (SDS)
Available in English, English (US), French, German, Italian, Polish, Russian, Spanish, Swedish.
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
- Azide, sodium
- Azoture de sodium
- Azydek sodu
- Kazoe
- Natriumazid
- Natriummazide
- Nemazyd
- sodium azide
- Sodium, azoture de
- Sodium, azoturo di
Frequently asked questions
What is sodium azide (hydrazoic acid sodium salt) commonly used for?
Sodium azide is primarily used as a precursor in the synthesis of organic azides, airbag inflators, and as a reagent in analytical chemistry, including azide-alkyne cycloaddition (click chemistry).
What is the molecular formula and molecular weight of sodium azide?
The molecular formula is N₃Na and the molecular weight is 65.01 g/mol.
How should sodium azide be stored?
Sodium azide should be stored at ambient temperature in a cool, dry place, away from sources of heat, sparks, or open flames.
What purity grades of sodium azide does Molekula supply?
Molekula supplies sodium azide in technical and reagent grades, with purity levels typically ≥98%.
Can Molekula supply sodium azide in bulk quantities?
Yes, Molekula can supply sodium azide in bulk, with quantities tailored to customer requirements—please contact us for specific inquiries.
What documentation is provided with a sodium azide order?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a product specification sheet.
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.