Source comparison
TB-500 Purity Verification: Vendor Comparison
Research-grade supplier (e.g., Real Peptides) ≥98% documented per batch Molecular weight confirmation ±0.5 Da ≤0.5 EU/mg via LAL assay Yes. Accredited lab Meets all three verification standards; reproducible results expected 503B compounding facility ≥95% (USP
This comparison does not assign a generated winner or score.
- Research-grade supplier (e.g., Real Peptides)
- ≥98% documented per batch
- Molecular weight confirmation ±0.5 Da
- ≤0.5 EU/mg via LAL assay
- Yes. Accredited lab
- Meets all three verification standards; reproducible results expected
- 503B compounding facility
- ≥95% (USP standard)
- Required for identity confirmation
- ≤0.5 EU/mg (FDA injectable standard)
- Variable. Some in-house
- Regulated but batch-to-batch consistency depends on facility quality controls
- Unregulated online peptide vendor
- Often undocumented or in-house only
- Rarely provided
- Not tested
- No
- High risk of sequence truncation, degradation, or contamination
- 'Gray market' research chemical supplier
- Generic COA template
- May show incorrect molecular weight
- Fails verification standards; unsuitable for reproducible research