"A practical supplier guide to GHK-Cu copper peptide powder (CAS 49557-75-7). Covers what it is, formulation notes, compatible actives, storage and sourcing checks."
-Deshangchemical-chemechemi
GHK-Cu Copper Peptide (CAS 49557-75-7): Why Formulators Keep Coming Back to the Blue Powder
GHK-Cu is one of those ingredients that has been around long enough to have a track record. It was first isolated from human plasma in 1973 by Loren Pickart, and the copper-bound tripeptide (glycyl-L-histidyl-L-lysine) has since become a standard reference point for anyone working on firming and repair-focused skincare. At Deshang we supply it as a high-purity blue powder, 99% cosmetic grade, and it remains one of the most requested peptide raw materials from our customers in Europe and North America.
What the molecule actually is
The full name trips people up: glycyl-L-histidyl-L-lysine copper complex. Its CAS is 49557-75-7, molecular formula C14H24N6O4, molecular weight 340.38. The blue color comes from the copper ion, which is what gives the material its common nickname, "blue copper peptide." In powder form it is soluble in acidic aqueous solution, and it should be kept at 2-8°C to preserve activity. That low storage temperature is not optional - copper peptides lose structure faster than people expect once they sit warm for too long.
Why it earns a place in the formula
The appeal is not marketing. GHK is a naturally occurring peptide in the human body, and its concentration drops steadily with age. Topical use is built around the idea of restoring some of that signal. In practice, formulators value GHK-Cu for a few concrete effects: it supports collagen and elastin production, it helps with overall skin firmness, and it has a documented role in wound healing and tissue repair. For an anti-aging line, that combination is hard to ignore.
The chemistry gives it a second job too. The copper center is a mild antioxidant, which helps protect the formula and the skin barrier from oxidative stress. That is a quiet benefit, but it matters when you are building a serum that has to stay stable on the shelf.
Working with it in the lab
Stability is where most of the real work happens. GHK-Cu performs best in a slightly acidic environment, which is why it dissolves cleanly in acidic aqueous systems. If you pair it with strong chelators or very high pH, the copper can disassociate and you lose the activity you paid for. Typical use levels in finished product sit in the low parts-per-million range, and most brands keep the active concentrate well under 1% of the formula.
Because it is a peptide, it plays best with a supporting cast rather than on its own. A brightening serum often stacks it with kojic acid (CAS 501-30-4), which targets uneven tone through a different pathway. For barrier support, squalane (CAS 111-01-3) is a common companion, since it replenishes the lipids the formula is trying to protect. And when the product needs a gentle cleansing or foaming step, sodium lauroylsarcosinate (CAS 137-16-6) is a frequent choice because it is mild enough to sit alongside sensitive-skin actives.
One pairing worth a closer look is creatine monohydrate (CAS 6020-87-7). It is better known as a sports-nutrition ingredient, but in topical format it supports cellular energy in the skin, which lines up neatly with GHK-Cu's repair story. We have seen several customers build a "firming plus recovery" duo around exactly these two.
Handling and storage notes
Keep the powder sealed and refrigerated. Once a batch is opened, minimize exposure to air and moisture, and work quickly when you weigh it out. We ship in standard sealed packaging and can support custom pack sizes and repacking through our warehouse service, which saves smaller brands the trouble of splitting bulk drums themselves.
For buyers, the practical questions are usually the same: what is the actual assay, what does the QC report show before shipment, and can a third party verify it. Those are reasonable things to ask, and we provide quality control documentation ahead of delivery and accept third-party inspection. Free samples are available for most products, with the customer covering shipping.
Sourcing from a working supplier
GHK-Cu is easy to find and easy to get wrong. Purity, color consistency, and melt behavior (our material shows a melting point above 144°C) are the quick checks that separate a reliable lot from a questionable one. If you are building or scaling a peptide line, the safer move is to lock in a supplier that can show the documentation and hold the spec batch after batch.
We supply GHK-Cu at 99% cosmetic grade and ship to more than 140 countries, with payment and delivery terms that fit both trial orders and steady contract volumes. If your current formula is missing a repair-focused peptide, or you want to test GHK-Cu against what you are already using, the full specification sheet and ordering details are on the GHK-Cu product page.
