α-Amanitin
SIGMA/A2263 - from Amanita phalloides, ≥85% (HPLC), powder
CAS Number: 23109-05-9
Empirical Formula (Hill Notation): C39H54N10O14S
Molecular Weight: 918.97
EC Number: 245-432-2
MDL Number: MFCD00215842
Linear Formula: C39H54N10O14S
Product Type: Chemical
| ε (extinction coefficient) | 13,500 at 310 nm in H2O at 1 M |
| assay | ≥85% (HPLC) |
| biological source | Amanita phalloides |
| color | white to light yellow |
| form | powder |
| InChI | 1S/C39H54N10O14S/c1-4-16( |
| InChI key | CIORWBWIBBPXCG-UHFFFAOYSA |
| mol wt | 918.97 g/mol |
| mp | 254-255 °C (lit.) |
| Quality Level | 200 ![]() |
| SMILES string | CCC(C)C1NC(=O)CNC(=O)C2Cc |
| solubility | H2O: 1.0 mg/mL |
| storage temp. | −20°C |
| Amino Acid Sequence: | Asn-Hyp-Hyi-Trp-Gly-Ile-G |
| Application: | α-Amanitin has been used: • for inducing transcriptional arrest in NT2 cells prior to immunofluorescence assay • to induce nephrotoxicity in mice renal tissues • to induce and analyse genotoxicity in mice bone marrow cells by cell viability assay, comet assay and chromosomal aberration assay |
| Biochem/physiol Actions: | Inhibits eukaryotic RNA polymerase II and III; does not inhibit RNA polymerase I or bacterial RNA polymerase; inhibits mammalian protein synthesis. |
| Biochem/physiol Actions: | The major toxic constituent of the mushroom, Amanita phalloides, inhibits eukaryotic RNA polymerase II and III, but does not inhibit RNA polymerase I or bacterial RNA polymerase. Inhibits mammalian protein synthesis. |
| Disclaimer: | When stored frozen in the dark, retained samples were found to be greater than 99% by HPLC after two years. |
| Preparation Note: | Store a 1 mg/ml aqueous stock solution frozen at -20°C. It does not degrade with repeated freeze-thaw cycles. Dilute into the appropriate buffer immediately prior to use. Product is destroyed by concentrated acid or base. |
| Symbol | ![]() GHS06,GHS08 |
| Signal word | Danger |
| Hazard statements | H300 - H373 |
| Precautionary statements | P260 - P264 - P270 - P301 + P310 - P314 - P405 |
| Hazard Codes | T+ |
| Risk Statements | 26/27/28-33 |
| Safety Statements | 36/37/39-45 |
| RIDADR | UN 3462 6.1 / PGII |
| WGK Germany | WGK 3 |
| Purity | ≥85% (HPLC) |
| mp | 254-255 °C (lit.) |
| Storage Temp. | −20°C |
| UNSPSC | 12352202 |



