FAQ - What is the meaning of SYSY lot numbers?

The labels on the antibody vials show a lot number consisting of the article number and one or two more digits after a slash e.g., 104211/15. These lot numbers distinguish different batches of lyophilization and are for internal control only.

When the lyophilized stock material of a product is running low, a new batch (10-25 units depending on the frequency of sale) will be lyophilized. One unit of each new batch is taken for testing and only if tested positive that batch will be stocked for sale.

It comes on sale when the previous lot is sold out. Due to this schedule, all products are always on stock and ready for sale.

Hence, all lots of a product come from the same frozen stock material and have identical characteristics. It is not possible to choose among different lots. Buying the same lot again is only possible if that lot is not yet out of stock.