Semax reaches purchasing under more names than almost anything else in the catalogue. Papers write MEHFPGP or ACTH(4-7)-PGP. Suppliers write Semax. The VaultLabs vial is printed SEMAX 10mg. All three refer to one seven-residue peptide, Met-Glu-His-Phe-Pro-Gly-Pro, CAS registry number 80714-61-0, molecular formula C37H51N9O10, molecular weight 813.87 g/mol. A requisition citing the letter string will not match an invoice citing the catalogue string, and that mismatch is where a receiving officer starts improvising. The identity record belongs to the Semax compound monograph; this page covers the catalogue mapping and the paperwork.
The acronym is the receiving problem
MEHFPGP is not a supplier code. It is the single-letter sequence written out, and it appears in the literature precisely because the sequence is short enough to spell. A requester who copies it onto a purchase line has given purchasing something that looks like a part number and is not.
Fix it once with a crosswalk row: literature name, sequence string, catalogue string as printed, SKU, inventory row. After that, a requisition naming ACTH(4-7)-PGP resolves without anyone guessing at the fridge door. Skip it, and each new requester re-derives the mapping from scratch.
The ACTH association that gets misread
The first four residues correspond to a fragment of adrenocorticotropic hormone; the final three, Pro-Gly-Pro, are a synthetic addition. That lineage means the compound is frequently filed mentally as a hormone fragment, which then drives inappropriate handling assumptions and occasionally an inappropriate enquiry. The literature describes Semax as lacking the corticotropic activity of the parent hormone, because the retained fragment sits outside the region responsible for it.