Long R3 IGF-1 · Long Arg3 IGF-I
| Classification | Recombinant 83-amino-acid analog of insulin-like growth factor 1 |
|---|---|
| Molecular weight | 9111 g/mol (approx.) |
| CAS number | 946870-92-4 |
| Solubility | Typically supplied lyophilized from a weak acid; consult the certificate of analysis for the recommended reconstitution buffer. |
| Reported half-life | Substantially longer than native IGF-1 in culture systems, attributable to greatly reduced IGF-binding protein affinity. |
International orders have a 3-vial minimum per product. Case pricing shown is international; US warehouse case pricing may differ and is shown at checkout.
An engineered IGF-1 analog with an arginine substitution at position 3 and a 13-residue N-terminal extension. Both modifications sharply reduce binding to IGF-binding proteins, which is why it is widely used as a cell-culture supplement — it stays bioavailable in media where native IGF-1 would be sequestered.
The following describes contexts in which this compound appears in published laboratory literature. Nothing here is a claim of efficacy, safety, or suitability for any use in humans or animals.
| Lyophilized powder | Store lyophilized powder at -20 °C, protected from light. |
|---|---|
| After reconstitution | Store at 2–8 °C and use within approximately 4 weeks. Glycoproteins are sensitive to mechanical agitation — swirl, never shake. |
| Shipping | Ships at ambient temperature. |
Open reconstitution calculator →
| Vial | 1 vial (US) | 3 vials (Intl) | Case of 5 | Case of 10 | Stock |
|---|---|---|---|---|---|
| 1mg | — | $255 | $300 | $570 | International |
$20 flat USA shipping · solutioning available at $10/vial · Denver stock ships within 1 business day of order confirmation.