Topic
Purity is not assay
Page 9 of 15 — The single most misunderstood distinction in peptide documentation: what fraction of the contents is the target compound, versus…
Messages — page 9 of 15
assay_not_puritypurity is not assay#coa-reading · 2025-12-13VialBotAssay note: QST lot SG-1177 reported at 99% of label content.#shipping-customs · 2025-12-13salt_bridgei was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2025-12-14halifax_hplcis area percent the same thing as how many mg are in the vial#coa-reading · 2025-12-14nadia_notespurity is not assay#coa-reading · 2025-12-14salt_bridgeif you only read one line on a certificate, read the lot number. if you read two, read the assay, from memory#coa-reading · 2025-12-14VialBotAssay note: SSA lot A-2418 reported at 99.2% of label content.#semaglutide · 2025-12-16VialBotAssay note: FGP lot SG-1177 reported at 99.2% of label content.#side-effects · 2025-12-16week_three_wallpurity is not assay#coa-reading · 2025-12-17lyophile_livsorry to jump in assay under label with good purity means you got less of the right thing. that is a fill problem, not a…#test-results · 2025-12-17VialBotAssay note: SWB lot G-0641 reported at 99% of label content.#other-peptides · 2025-12-18igf_one_ivyif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2025-12-18coelution_caipurity is not assay#coa-reading · 2025-12-19coelution_caipurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2025-12-19VialBotAssay note: TFC lot H-2814 reported at 96.8% of label content.#shipping-customs · 2025-12-19VialBotAssay note: CPC lot KP-0925 reported at 99% of label content.#hplc-massspec · 2025-12-20related_subspurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-01-03tail_factorquick one why would a vial be 99 pure and still assay under label#coa-reading · 2026-01-03tail_factorpurity is not assay#coa-reading · 2026-01-03vienna_vialif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-01-03VialBotAssay note: ERP lot C-4402 reported at 99.4% of label content.#semaglutide · 2026-01-04area_percentif the lab reports area percent without stating the wavelength, the number is less useful than it looks, i think#hplc-massspec · 2026-01-06marrow.moddo you trust an area percent from a shallow gradient#hplc-massspec · 2026-01-07step_one_sianassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-01-07VialBotAssay note: CPC lot F-1330 reported at 99% of label content.#retatrutide · 2026-01-08LC_MS_Lenais area percent the same thing as how many mg are in the vial#coa-reading · 2026-01-08cat_on_the_traywhy would a vial be 97.4 pure and still assay under label#coa-reading · 2026-01-08tail_factorcoming back to this do you trust an area percent from a shallow gradient#hplc-massspec · 2026-01-09thyroid_theawhile im here assay under label with good purity means you got less of the right thing. that is a fill problem, not a…#test-results · 2026-01-09split_dose_samif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-01-10split_dose_sami was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does a…#coa-reading · 2026-01-10ari_arriveswhile im here assay under label with good purity means you got less of the right thing. that is a fill problem, not a…#test-results · 2026-01-10otto_swirlspurity is not assay#coa-reading · 2026-01-11truncation_truassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-01-11oli_oralsi was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2026-01-12oli_oralsif you only read one line on a certificate, read the lot number. if you read two, read the assay, happy to be corrected#coa-reading · 2026-01-12relabel_watchslightly off topic but is area percent the same thing as how many mg are in the vial#coa-reading · 2026-01-12hard_stop_halpurity is not assay#coa-reading · 2026-01-12deamidationright so assay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis…#test-results · 2026-01-12HPLC_Hanki was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2026-01-13acetate_ashwhy would a vial be 99.2 pure and still assay under label#coa-reading · 2026-01-13swab_dry_firstslightly off topic but purity is what fraction of the contents is the target. assay is how many mg are actually there.…#coa-reading · 2026-01-13blind_submitassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-01-13VialBotAssay note: SWB lot F-1330 reported at 99% of label content.#retatrutide · 2026-01-14ghent_gradientquick one i was wrong about this for a year: area percent under-reports nothing, it just answers a different question than…#coa-reading · 2026-01-15two_lifts_a_weekpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-01-15plus_sixteenassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-01-15slow.taperif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-01-16shame_and_medsassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-01-16tare_weightis area percent the same thing as how many mg are in the vial#coa-reading · 2026-01-18tarpit_tamright. area% vs assay. i am going to say this once properly and then link people here forever#coa-reading · 2026-01-18tarpit_tamworked example, two made-up vials off the same label#coa-reading · 2026-01-18VialBotAssay note: TFC lot D-0718 reported at 99.2% of label content.#anz · 2026-01-18VialBotAssay note: QYB lot G-0641 reported at 98.1% of label content.#reconstitution · 2026-01-20otto_swirlsassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-01-20HPLC_Hankpurity is not assay#coa-reading · 2026-01-22private_script_pripurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-01-22HPLC_Hanki was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does…#coa-reading · 2026-01-22is_this_foreveris area percent the same thing as how many mg are in the vial#coa-reading · 2026-01-23karl_fischerwhy would a vial be 99 pure and still assay under label#coa-reading · 2026-01-23