Aventris Labs
Batch Verification Report
Batch verification and analytical summary for Retatrutide.
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Product
Retatrutide (CAS 2381089-83-2)
Molecular Formula
C₂₂₁H₃₄₂N₄₆O₆₈
| MW 4731.33 g/mol
Intended use
Laboratory research and analytical reference applications only.
Batch & dates
Batch: P260213-L013
Manufacture date: 13 Feb 2026
Recommended retest date: 12 Feb 2028
Manufacture date: 13 Feb 2026
Recommended retest date: 12 Feb 2028
Form & amount
Form: Lyophilised peptide powder
Amount: As specified on Aventris product label
Amount: As specified on Aventris product label
Storage
Store in a cool, dry place away from light. Follow Aventris storage guidance on the
product label.
Analytical Results
The following analytical data was obtained from manufacturer testing of batch P260213-L013. Aventris has independently verified this data against our quality specifications.
| Test | Method | Specification | Result | Status |
|---|---|---|---|---|
| Appearance | Visual | White powder | Conforms | PASS |
| Solubility (water) | Visual | ≥ 30 mg/mL | Conforms | PASS |
| Identity | MS (ESI) | Mw 4731.33 ± 1.0 | 4731.42 | PASS |
| Purity | HPLC | ≥ 98.0% | 99.32% | PASS |
| Peptide content | N% | ≥ 85.0% | 93.93% | PASS |
| Water content | Karl Fischer | ≤ 10.0% | 2.12% | PASS |
| pH (5 mg/mL) | pH meter | 6.0 – 8.0 | 6.84 | PASS |
| Acetate content | HPLC | ≤ 0.5% | N.D. | PASS |
| TFA content | HPLC | ≤ 0.5% | N.D. | PASS |
| Sodium salt | Ion analysis | < 5.0% | 1.52% | PASS |
| Assay (HPLC) | HPLC | 95.0 – 105.0% | 99.51% | PASS |
Residual Solvents (GC)
| Solvent | Specification | Result | Status |
|---|---|---|---|
| Acetonitrile | NMT 410 ppm | N.D. | PASS |
| Methanol | NMT 3000 ppm | N.D. | PASS |
| Methylene chloride | NMT 600 ppm | N.D. | PASS |
| N,N-Dimethylformamide | NMT 880 ppm | N.D. | PASS |
| Isopropyl ether | NMT 5000 ppm | N.D. | PASS |
Microbial & Endotoxin
| Test | Specification | Result | Status |
|---|---|---|---|
| Bacterial endotoxins | < 10 EU/mg | Conforms | PASS |
| Total aerobic microbial count | ≤ 1000 cfu/g | < 10 cfu/g | PASS |
| Total yeast & mold | ≤ 200 cfu/g | < 10 cfu/g | PASS |
Storage & Handling
Storage Conditions:
- Store at -20°C or below in original sealed vial
- Protect from light and moisture
- Do not freeze-thaw repeatedly once reconstituted
- Recommended shelf life: 24 months when stored properly
General Laboratory Handling:
- Handle using standard laboratory safety practices
- Wear appropriate PPE (gloves, lab coat, safety glasses)
- Use in well-ventilated area or fume hood
- Avoid inhalation, ingestion, or skin/eye contact
- Wash hands thoroughly after handling
Reconstitution:
Reconstitution methods, diluents, and
working concentrations must be determined by qualified researchers according to their specific experimental protocols and
institutional guidelines. Aventris does not provide reconstitution instructions.
Additional Documentation:
For questions about this
batch or to request additional information, contact [email protected]
All parameters conform to specification. No deviations noted.