Which form of GHK-Cu is in the catalogue?

The neutral 1:1 copper complex, C14H22CuN6O4, 401.91 g/mol (PubChem CID 165429100). To confirm the ratio of a batch, ask for copper content and peptide content and calculate the Cu²⁺ : peptide ratio.

Can copper analysis be added to the COA?

Yes, on request: copper by ICP or AAS, the Cu²⁺ : peptide ratio and UV-Vis are agreed before the quote.

Can purchasing get a quote or proforma invoice?

Every order starts with a written quote with unit price, shipping and lead time. Ask sales if your purchasing department needs a proforma invoice.

Do you have third-party reports?

Yes, for GHK-Cu 50 mg, from a third-party laboratory in Tianjin. A low-resolution first page is on the batch-data page and the GHK-Cu page; sales send the full report on request.

Which molecular weight goes into a ratio calculation?

The free peptide's: 340.38 g/mol for GHK and 354.41 g/mol for AHK. The neutral 1:1 complexes are 401.91 g/mol (GHK-Cu) and 415.94 g/mol (AHK-Cu, calculated).

Research laboratories

Copper peptides for research laboratories.

Know which form you are buying: sourced identity facts, a batch COA, and copper data when you need it.

How buying works

A laboratory needs to know exactly which form it is buying. Each product page has an HTML fact table — sequence, formula, molecular weight with the form it describes, CAS and PubChem record — with a source on every row.

Each batch of a stocked product has a COA with HPLC purity, MS identity, bacterial endotoxin and fill. Copper content, the Cu²⁺ : peptide ratio, UV-Vis, water and acetate can be added before the quote.

For an incoming-goods file, ask for the data card of the batch: it copies the batch number, test date, appearance, HPLC purity, endotoxin and fill from the COA, and the copper lines when you requested them.

What laboratories ask first

Which form of GHK-Cu is in the catalogue?: The neutral 1:1 copper complex, C14H22CuN6O4, 401.91 g/mol (PubChem CID 165429100). To confirm the ratio of a batch, ask for copper content and peptide content and calculate the Cu²⁺ : peptide ratio.
Can copper analysis be added to the COA?: Yes, on request: copper by ICP or AAS, the Cu²⁺ : peptide ratio and UV-Vis are agreed before the quote.
Can purchasing get a quote or proforma invoice?: Every order starts with a written quote with unit price, shipping and lead time. Ask sales if your purchasing department needs a proforma invoice.
Do you have third-party reports?: Yes, for GHK-Cu 50 mg, from a third-party laboratory in Tianjin. A low-resolution first page is on the batch-data page and the GHK-Cu page; sales send the full report on request.
Which molecular weight goes into a ratio calculation?: The free peptide's: 340.38 g/mol for GHK and 354.41 g/mol for AHK. The neutral 1:1 complexes are 401.91 g/mol (GHK-Cu) and 415.94 g/mol (AHK-Cu, calculated).