Certificate of analysis
Retatrutide
Every released batch of Retatrutide, with the analytical record that released it. Figures are the laboratory's measurements — where the label and the assay disagree, the assay is the number to calculate from.
- Batches published
- 01
- Current batch
- EVN-RETA-2605
- Assayed purity
- 99.38%
- Released
- 21 May 2026
Current batch
EVN-RETA-2605
Determinations
| Determination | Result | Specification | Method |
|---|---|---|---|
| Purity | 99.38% | ≥ 99.0% | RP-HPLC, UV 214 nm |
| Identity | 4731.6 Da (theoretical 4731.4) | Conforms to theoretical mass | ESI-MS |
| Assayed content | 98.7% of label | 95.0 – 110.0% of label | RP-HPLC against reference standard |
| Water content | 4.6% | ≤ 8.0% | Karl Fischer titration |
| Residual solvents | Acetonitrile 131 ppm; TFA 84 ppm | Within USP <467> limits | Headspace GC-FID |
| Appearance | White to off-white lyophilised cake | Conforms | Visual inspection |
- Assayed content
- 9.87 mg / 10 mg
- Laboratory
- Northgate Bioanalytical
- Accreditation
- ISO/IEC 17025 accredited
- Accession
- NGB-26-0552
- Manufactured
- 6 April 2026
- Tested
- 14 May 2026
- Released
- 21 May 2026
- Retest interval
- 24 months from date of manufacture
Storage conditions
Lyophilised, −20 °C, protected from light and moisture. Sample retained under identical conditions for the duration of the retest interval.
Testing standards
The references applied
Compendial standards govern how each determination is made and what limit it is judged against. Naming them is what allows a result to be compared with one produced elsewhere.
- 01USP <1225> — Validation of compendial procedures
- 02USP <467> — Residual solvents
- 03USP <921> — Water determination
- 04ISO/IEC 17025:2017 — Testing laboratory competence
Documentation
Confirm it at the source.
Ask the desk to arrange confirmation of any Retatrutide certificate directly with the issuing laboratory, or to retrieve an archived batch record.