Molekula
Silver nanoparticles, 20nm, 0.02 mg/ml, supplied in 2mM sodium citrate, 405nm absorption
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
Silver nanoparticles are ultra-fine metallic silver particles, 20 nanometers in size, suspended at 0.02 mg/ml in 2 mM sodium citrate for stability. They are primarily used in antimicrobial coatings, biosensors, and nanomedicine due to their high surface-area-to-volume ratio and plasmonic properties, with a peak absorption at 405 nm. This product has a CAS number of 7440-22-4, a molecular formula of Ag, and a molecular weight of 107.87 g/mol. It is stored at ambient conditions and carries a **Danger** signal word. Molekula supplies silver nanoparticles 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 |
|---|---|
| Appearance | Solid |
| Concentration | 2.5 (OD) |
| Core Size | 20 nm (± 3 nm) |
| Buffer (Sodium citrate) | 2 mM |
| Concentration (mg/ml) | ~ 0.02 |
| Absorption (ʎ max) | 402 nm |
| Hydrodynamic Diameter (z-average) | 21 nm |
| Particles / ml | ~ 4.6E + 11 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 9 |
| Packing Group | III |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White metal, face-centered cubic structure |
| Melting Point | 962 °C |
| Boiling Point | 2212 °C |
| Density | 10.5 (relative, water = 1) |
| Vapour Pressure | 0 mmHg (approx) |
Source: PubChem CID 23954 (HSDB, ICSC, The National Institute for Occupational Safety and Health (NIOSH))
Identification
| Property | Value |
|---|---|
| SKU | 90037314 |
| CAS Number | 7440-22-4 |
| IUPAC Name | silver |
| EC Number | 231-131-3 |
| Molecular Formula | Ag |
| Molecular Weight | 107.87 |
| Exact Mass | 106.9051 |
| SMILES | [Ag] |
| InChIKey | BQCADISMDOOEFD-UHFFFAOYSA-N |
| InChI | InChI=1S/Ag |
| PubChem CID | 23954 |
| UN Number | UN3077 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 32073000 |
| Tariff Code | 3207300030 |
Safety & GHS
-
Serious Health Hazard
GHS08
-
Hazardous to the Environment
GHS09
Hazard statements
- EUH381 Suspected of causing endocrine disruption in humans
- H360 May damage fertility or the unborn child
- H373 May cause damage to organs through prolonged or repeated exposure
- H400 Very toxic to aquatic life
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
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
- Algaedyn
- Argentum
- Astroflake 5
- Colloidal silver
- Shell silver
- Silber
- SILVER
- Silver atom
- Silver metal
- Silver, colloidal
Frequently asked questions
What are silver nanoparticles (20nm, 0.02 mg/ml) commonly used for?
These nanoparticles are widely used in antimicrobial coatings, biosensing applications, catalysis, and as a standard for surface-enhanced Raman spectroscopy (SERS).
What is the chemical formula and molecular weight of silver nanoparticles?
The chemical formula is **Ag** (elemental silver), and the molecular weight is **107.87 g/mol** per silver atom.
How should silver nanoparticles (20nm) be stored?
Store at **ambient temperature** in a clean, dry environment, protected from light and contamination. Avoid repeated freeze-thaw cycles.
What grade or purity level is available for this product?
This product is supplied as a **high-purity colloidal suspension** (99.9% trace metals basis) with minimal agglomeration, suitable for research and industrial applications.
Can Molekula supply silver nanoparticles in bulk quantities?
Yes, we offer **bulk customization**—please contact us for pricing and lead times on larger volumes or alternative concentrations.
What documentation comes with the order of silver nanoparticles?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and batch-specific characterization data (e.g., UV-Vis spectrum, TEM images if requested).
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.