SPECIMEN — ILLUSTRATIVE FORMAT. This certificate shows the COA layout for this compound. Lot number, dates, and measured results (shown as “____”) are completed on the certificate issued with each shipped lot.
Product Identification
Product Retatrutide (HXR-RETATRUTIDE) Full name Retatrutide (LY3437943, GIP/GLP-1/glucagon triple receptor agonist peptide) CAS No. 2381089-83-2 Molecular formula C₂₂₁H₃₄₂N₄₆O₆₈ Molecular weight 4731.3 g/mol Appearance White lyophilized powder Lot No. ____ Manufacture date ____ Re-test date ____ Quantity 30 mg
Analytical Results
Test Method Specification Result
Purity RP-HPLC ≥98% (HPLC) ____ Identity ESI-MS Consistent with MW ____ Appearance Visual White powder ____ Solubility Visual Soluble in water / AcOH ____ Water content Karl Fischer ≤ spec ____ Counterion (acetate / TFA) HPLC Report ____
Analytical Spectra
RP-HPLC Chromatogram
Absorbance (220 nm)
Retention Time (min)
Retatrutide
Column: C18, 4.6×150mm · Mobile phase: ACN/H₂O (0.1% TFA) · Flow: 1.0 mL/min
ESI Mass Spectrum
Relative Abundance
m/z
[M+3H]³⁺
[M+4H]⁴⁺
[M+5H]⁵⁺
calc.
calc.
Ionization: ESI+ · Mass range: 200–2000 m/z · Deconvoluted MW consistent with theoretical
Sequence Tyr-Aib-Gln-Gly-Thr-Phe-Thr-Ser-Asp-Tyr-Ser-Ile-αMeLeu-Leu-Asp-Lys-Lys(C20 diacid-γGlu/AEEA linker)-Ala-Gln-Aib-Ala-Phe-Ile-Glu-Tyr-Leu-Leu-Glu-Gly-Gly-Pro-Ser-Ser-Gly-Ala-Pro-Pro-Pro-Ser-NH₂ (39-residue GIP-based backbone; non-coded residues Aib2, αMeLeu13, Aib20; C-terminal amide)
Storage & Handling
Store at −20°C, desiccated, protect from light. Minimize freeze–thaw cycles. Reconstitute under aseptic laboratory conditions.
Reviewed / Approved by ____________________ (QC)
Date ____________________
RESEARCH USE ONLY
Not for human or veterinary use, food, drug, or therapeutic application.
Helix Reagents LLC · getpeptides.com ·
HXR-RETATRUTIDE
This certificate is valid only for the lot identified above.