Topic
Purity is not assay
Page 12 of 15 — The single most misunderstood distinction in peptide documentation: what fraction of the contents is the target compound, versus…
Messages — page 12 of 15
area_percentif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-03-21assay_not_purityis area percent the same thing as how many mg are in the vial#coa-reading · 2026-03-21VialBotAssay note: SWB lot E-2205 reported at 99.4% of label content.#off-topic · 2026-03-21two_four_ceilingif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-03-23VialBotAssay note: ERP lot C-4402 reported at 96.8% of label content.#retatrutide · 2026-03-24VialBotAssay note: TFC lot C-4402 reported at 99.4% of label content.#mental-health · 2026-03-24dark_for_ten_daysslightly off topic but purity is what fraction of the contents is the target. assay is how many mg are actually there.…#coa-reading · 2026-03-25typosquat_tayis area percent the same thing as how many mg are in the vial#coa-reading · 2026-03-25typosquat_tayif you only read one line on a certificate, read the lot number. if you read two, read the assay, i could be wrong#coa-reading · 2026-03-25VialBotAssay note: MKM lot KP-0925 reported at 96.8% of label content.#shipping-customs · 2026-03-26karl_fischerdo you trust an area percent from a shallow gradient#hplc-massspec · 2026-03-27fake_trackingif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-03-27void_volumepurity is not assay#coa-reading · 2026-03-28VialBotAssay note: BCH lot F-1330 reported at 97.4% of label content.#coa-reading · 2026-03-28LC_MS_Lenai was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2026-03-28low_and_slowif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-03-28void_volumeif the lab reports area percent without stating the wavelength, the number is less useful than it looks i was wrong about…#hplc-massspec · 2026-03-30HPLC_Hankassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-03-30travel_coolerpurity is not assay#coa-reading · 2026-03-31VialBotAssay note: MKM lot B-0114 reported at 97.4% of label content.#coa-reading · 2026-03-31VialBotAssay note: CPC lot KP-0925 reported at 98.1% of label content.#lab-requests · 2026-03-31VialBotAssay note: BCH lot H-2814 reported at 99% of label content.#vendor-verification · 2026-04-01VialBotAssay note: SGN lot D-0718 reported at 99% of label content.#reconstitution · 2026-04-03yyz_vialassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-04-03VialBotAssay note: SGN lot A-2418 reported at 99.2% of label content.#reconstitution · 2026-04-04acetate_ashright so do you trust an area percent from a shallow gradient#hplc-massspec · 2026-04-04acetate_ashif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-04-04VialBotAssay note: FGP lot SG-1177 reported at 97.4% of label content.#wins · 2026-04-04VialBotAssay note: WXT lot A-2601 reported at 99.2% of label content.#semaglutide · 2026-04-05triple_ag_tomdo you trust an area percent from a shallow gradient#hplc-massspec · 2026-04-05VialBotAssay note: TFC lot G-0641 reported at 97.4% of label content.#shipping-customs · 2026-04-05unsolicited_dmpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-04-06mhra_unlicensedis area percent the same thing as how many mg are in the vial#coa-reading · 2026-04-06cagri_curiousquick one if you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-04-06mhra_unlicensedi was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does, i…#coa-reading · 2026-04-06VialBotAssay note: QYB lot A-2601 reported at 98.1% of label content.#off-topic · 2026-04-06truncation_trupurity is not assay#coa-reading · 2026-04-07VialBotAssay note: QST lot SG-1177 reported at 98.6% of label content.#off-topic · 2026-04-07meniscus_melis area percent the same thing as how many mg are in the vial#coa-reading · 2026-04-08HPLC_Hankpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-04-08HPLC_Hankif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-04-09HPLC_Hankdo you trust an area percent from a shallow gradient#hplc-massspec · 2026-04-09VialBotAssay note: GL Biochem lot E-2205 reported at 96.8% of label content.#asia · 2026-04-10nausea_windowis area percent the same thing as how many mg are in the vial#coa-reading · 2026-04-11the_bet_2026purity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-04-11same_chromatowhy would a vial be 99 pure and still assay under label#coa-reading · 2026-04-11red_flag_rubyfollow up is area percent the same thing as how many mg are in the vial#coa-reading · 2026-04-12red_flag_rubyi was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2026-04-12VialBotAssay note: GGPeps lot H-2814 reported at 98.6% of label content.#coa-reading · 2026-04-13tga_noticedo you trust an area percent from a shallow gradient#hplc-massspec · 2026-04-13VialBotAssay note: TFC lot A-2418 reported at 98.6% of label content.#semaglutide · 2026-04-14area_percentassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-04-14VialBotAssay note: QST lot KP-0925 reported at 99.2% of label content.#oral-glp1 · 2026-04-16assay_not_puritygenuine question i was wrong about this for a year: area percent under-reports nothing, it just answers a different question…#coa-reading · 2026-04-16assay_not_puritypurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-04-16VialBotAssay note: ERP lot E-2205 reported at 98.6% of label content.#reconstitution · 2026-04-17deamidationi was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does,…#coa-reading · 2026-04-17lena_lotspurity is not assay#coa-reading · 2026-04-17blank_runif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-04-17nine_nine_onedo you trust an area percent from a shallow gradient#hplc-massspec · 2026-04-18