| Description | Pyrromethene 556 (PM556) is a green-fluorescent polar tracer dye utilized in researching membrane fusion, lysis, and gap-junctional communication, as well as in monitoring cell and liposome volume alterations. |
| Synonyms | PM556 |
| molecular weight | 466.2 |
| Molecular formula | C14H15BF2N2Na2O6S2 |
| CAS | 121461-69-6 |
| Storage | keep away from direct sunlight | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice. |