Certificate of analysis

Tirzepatide

Sold as 10 mg / vial by Sovereign Group Buy.

Batch TZ-2406-B · Sample OPT-6F19K2 · received Jun 5, 2026 · reported Jun 18, 2026

The seller disputes this result. A retest is in progress. A second sealed sample is being re-assayed by an independent lab. This certificate stays published, marked disputed, until the retest lands.

What went wrong, in plain words

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1Identity

LC-MS

Is it the compound on the label?

Molecular ion [M+H]⁺	4814.6 Da	4813.5 Da theoretical	PASS
Sequence match	Confirmed Tirzepatide	reference standard	PASS

2Content / potency

Amino acid analysis

Did you get the milligrams you paid for?

Label claim	10 mg / vial	—
Measured content		≥ 95% of label
Percent of label		≥ 95%

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All 14 measured values, the chromatogram and the peak table are free with an account.

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3Purity

RP-HPLC

What is the rest of the powder?

Main peak		≥ 98.0%
Total related impurities		≤ 2.0%

Peak	RT (min)	Area %
#1	50.0	7.2%
#2	36.0	4.9%
#3	26.9	9.6%

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4Sterility & endotoxin

LAL

Is there bacterial debris in it?

Bacterial endotoxin		≤ 10 EU/mg
Microbial bioburden		≤ 10 CFU/mg

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5Heavy metals

ICP-MS

Lead, arsenic, cadmium, mercury.

Arsenic (As)		≤ 1.5
Lead (Pb)		≤ 0.5
Cadmium (Cd)		≤ 0.5
Mercury (Hg)		≤ 0.3

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6Residual solvents

Industrial solvent left over from making it.

Acetonitrile		≤ 410 ppm
Trifluoroacetic acid		report
Methanol		≤ 3000 ppm

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How the score is worked out, and every published limit →