What purities are your peptides?

Catalog peptides: We never sell a catalog peptide below 98% purity (HPLC area %).

Many shorter sequences are routinely ≥99%.

Larger proteins (e.g., IGF-1 LR3): Supplied as receptor grade, with ≥95% purity and lot-by-lot QC.

How we report purity

• Purity is reported as HPLC area % for the main peak.
• Each product has a Certificate of Analysis (COA) that typically includes HPLC and MS data.
• Note: HPLC % is not the same as weight %; counter-ions, water content, and salt form are handled separately on the COA.

Need ultra-high purity or a specific spec?

If your protocol requires a tighter spec or additional analytics, reach out with your use case and we’ll review available lots or discuss options.

RUO reminder: All products are for laboratory research use only and not for human or veterinary consumption.