Molekula
Sodium azide
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
Sodium azide is a highly toxic inorganic compound used in chemical synthesis, as a preservative in biological solutions, and in the production of airbag inflators. It is a white crystalline solid with the molecular formula N₃Na and a molecular weight of 65.01 g/mol. It is stable at ambient temperatures and should be handled with care due to its toxicity. 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.
Often bought together
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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100 g — £34.60 per pack ex VAT · £41.52 inc. VAT
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500 g — £99.50 per pack ex VAT · £119.40 inc. VAT
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1 kg — £138.00 per pack ex VAT · £165.60 inc. VAT
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2 kg — £246.00 per pack ex VAT · £295.20 inc. VAT
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5 kg — £588.00 per pack ex VAT · £705.60 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 | 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 | 31803515 |
| 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.
Synonyms
- Azide, sodium
- Azoture de sodium
- Azydek sodu
- Hydrazoic acid sodium salt
- Kazoe
- Natriumazid
- Natriummazide
- Nemazyd
- Sodium, azoture de
- Sodium, azoturo di
Frequently asked questions
What is sodium azide used for?
Sodium azide is primarily used as a preservative in biological and chemical reagents and as a precursor in the synthesis of other azide compounds.
What is the chemical formula and molecular weight of sodium azide?
The formula is N3Na and the molecular weight is 65.01 g/mol.
How should sodium azide be stored?
Store at ambient temperature, away from heat and incompatible materials, and keep in a tightly closed container.
What grade of sodium azide does Molekula supply?
Molekula supplies sodium azide in high-purity grade suitable for laboratory and research use.
Can Molekula supply sodium azide in bulk quantities?
Yes, Molekula can supply sodium azide in bulk quantities—please contact us for pricing and availability.
What documentation comes with a sodium azide order?
Each order includes a Certificate of Analysis and Safety Data Sheet (SDS) compliant with GHS standards.
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.