Start with the compound profile
Open the GHK-Cu profile and read its identity table together with the identity note and source links. The name, formula, sequence or modifications, mass fields, CAS number and PubChem CID describe a defined chemical record. They help you compare descriptions across documents; they do not identify the contents of a particular vial. Keep the catalog code and the lot number alongside these fields in your purchasing record. Record the database entry and chemical form used for each comparison.
Read the mass label and unit
IUPAC distinguishes relative molecular mass, traditionally called molecular weight, from molar mass. The former is dimensionless; the latter is mass divided by amount of substance. On NorthVerity profiles, the average molecular weight field is displayed in g/mol. Preserve that label and unit when recording the value rather than comparing an unlabeled number.
- Average molecular weight uses isotope-averaged atomic weights for the stated formula. It is tied to the chemical form recorded, including any stated modification or complex.
- Monoisotopic mass is displayed separately in Da and marked calculated. It sums selected isotope masses from the formula; it is not a measured mass-spectrum result for the supplied lot.
Compare GHK and GHK-Cu
The profile follows PubChem’s prezatide copper record: GHK-Cu has formula C14H23CuN6O4+, average molecular weight 402.92 g/mol, CAS 89030-95-5 and CID 71587328. The free GHK record instead has formula C14H24N6O4, average molecular weight 340.38 g/mol, CAS 49557-75-7 and CID 73587. The copper complex and free tripeptide are related but distinct identities. Do not transfer the free-peptide value to the copper-complex entry simply because both names contain GHK.
Link identifiers to the current lot
A CAS Registry Number identifies a substance. A PubChem CID identifies a compound record in that database. Neither is a NorthVerity SKU or a batch number. If two documents disagree, compare their stated form and sources, then request clarification with the exact product code. Record the source and review date so another person can retrace the comparison.
Each report covers only the sample and batch printed on it. Verify it on the issuer’s website and check that the lot number matches the goods you receive.
- Compare the same chemical form, mass basis and unit in each source.
- Keep original documents and record unresolved differences without averaging conflicting values.
- Request current-lot documents before linking a reference record to the material being offered.
For laboratory research. Not for human or animal use.