neb.com will be undergoing maintenance on Sunday, June 11th, from 10am to 12pm US ET. If you experience an issue, please try again after the maintenance window. We apologize in advance for any inconvenience this may cause.
When stored at -20°C, they are stable for years. If they are freeze thawed frequently they should be stable for a year. If the solutions are stored at 4°C bacteria can grow in them. Bacterial growth is accelerated if the solution is diluted in a buffer containing magnesium. Discard solutions stored at 4°C after one week.