Research question
What does the mass-spec line on a certificate show?
A purity percentage can be high while the main peak is the wrong molecule. That is why GetReta pairs HPLC with mass spectrometry. The mass-spec line says whether the observed mass agrees with retatrutide, CAS 2381089-83-2, development code LY3437943. It is an identity check. It is not a claim that every minor peak has been named.
On the certificate, read it beside the HPLC figure and the lot code. The three belong together. A mass that matches and a purity at or above 99 percent is the release pattern GetReta uses. A mass that does not match is a reason to quarantine the vial and write to orders@getreta.co.uk, not a reason to “average” the two results.
The sample lot on the website states that its mass line is a sample sentence. Do not cite GR-SAMPLE-0001 in a laboratory notebook as if it were your vial. Research use only.