Quality, How every batch is tested

Every batch is analysed by reversed-phase high-performance liquid chromatography before it is released, read at the wavelength of the peptide bond. Purity is the main peak’s share of the total peak area, and a batch is released only when that figure is 98.0% or higher.

A certificate belongs to a batch, not to a product name. Each box carries its batch number, and the certificate for that number records the result for the vials in your hands, so two orders of the same line from different batches have two certificates.

1. Find the batch number on the box label.
2. Enter it at the lab’s certificate lookup, tjqxgdlab.com.
3. Check that the compound, the batch number and the purity on the certificate match your box.

If anything does not match, write to us with the batch number and a photo of the label before you use the material.

Peptides are supplied as lyophilised, freeze-dried, powder in sealed vials, ten to a box unless the entry says otherwise. Lyophilised material keeps best unopened, frozen at −20 °C, dry and away from light. Solutions such as bacteriostatic water are listed with their volume per vial.

The table is drawn from live stock. A line appears only while it is on the shelf (13 today) or already on its way to us, so every entry you can order from describes material that exists.

All products are sold for laboratory research use only. We do not give dosing, administration or usage guidance. See the research use policy.