External laboratory testing
Certificates of Analysis
Product
11 certificates
- PASS
Retatrutide
SYN-COA-2026-RET060-2109
Reta Pen 60mg
- Batch
- SYN-RET060-2109
- Issued
- Aug 05, 2026
- Purity
- 98.8%
- Tests
- 15/15
- PASS
Retatrutide
SYN-COA-2026-RET060-2108
Reta Pen 60mg
- Batch
- SYN-RET060-2108
- Issued
- Aug 05, 2026
- Purity
- 98.8%
- Tests
- 15/15
- PASS
Retatrutide
SYN-COA-2026-RET060-2107
Reta Pen 60mg
- Batch
- SYN-RET060-2107
- Issued
- Aug 04, 2026
- Purity
- 99.3%
- Tests
- 15/15
- PASS
Retatrutide
SYN-COA-2026-YWRZ3560
Reta Pen 60mg
- Batch
- YWRZ3560
- Issued
- Aug 2026
- Purity
- 98.9%
- Tests
- 15/15
- PASS
Retatrutide
SYN-COA-2026-RET040-2106
Reta Pen 40mg
- Batch
- SYN-RET040-2106
- Issued
- Jul 13, 2026
- Purity
- 99.0%
- Tests
- 15/15
- PASS
Retatrutide
SYN-COA-2026-RET040-2105
Reta Pen 40mg
- Batch
- SYN-RET040-2105
- Issued
- Jul 13, 2026
- Purity
- 99.3%
- Tests
- 15/15
- PASS
Retatrutide
SYN-COA-2026-RET040-2104
Reta Pen 40mg
- Batch
- SYN-RET040-2104
- Issued
- Jul 13, 2026
- Purity
- 98.9%
- Tests
- 15/15
- PASS
Retatrutide
SYN-COA-2026-RET120-2103
Reta Liquid 120mg
- Batch
- SYN-RET120-2103
- Issued
- Jul 12, 2026
- Purity
- 98.9%
- Tests
- 15/15
- PASS
Retatrutide
SYN-COA-2026-RET120-2129
Reta Liquid 120mg
- Batch
- SYN-RET120-2129
- Issued
- Jul 2026
- Purity
- 99.0%
- Tests
- 15/15
- PASS
Retatrutide
SYN-COA-2026-RET120-2128
Reta Liquid 120mg
- Batch
- SYN-RET120-2128
- Issued
- Jul 2026
- Purity
- 99.1%
- Tests
- 15/15
- PASS
Retatrutide
SYN-COA-2026-RET040-2101
Reta Pen 40mg
- Batch
- SYN-RET040-2101
- Issued
- Jan 15, 2026
- Purity
- 99.1%
- Tests
- 15/15
From batch sample to published certificate
Each certificate covers one production batch.
01
Sample logged
A sample from the batch is logged under an accession number, which becomes the report number.
02
Purity by HPLC-UV
Reversed-phase HPLC on a C18 column at 220 nm separates the active from related substances and gives the assayed purity.
03
Identity by ESI-MS
Electrospray mass spectrometry confirms the molecular mass of the active, within 5 ppm.
04
Listed tests
The remaining tests on the certificate are run against the specification printed beside each one.
05
Release
Quality Assurance authorises the certificate electronically and it is published here, under its report number.
Verify a unit
A certificate covers a batch. To check one unit, enter its unit code.