Understand the source comparison
99 Purity Peptide Grade Quality Meaning: Standards Comparison
Crude 50–70% 40–60% Deletion sequences, truncated chains, side-reaction products Optional Preliminary screening, non-critical applications Desalted 70–85% 55–75% Deletion sequences, counterion salts, residual TFA Recommended Cell culture work where high purity
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Crude
- 50–70%
- 40–60%
- Deletion sequences, truncated chains, side-reaction products
- Optional
- Preliminary screening, non-critical applications
- Desalted
- 70–85%
- 55–75%
- Deletion sequences, counterion salts, residual TFA
- Recommended
- Cell culture work where high purity isn't critical
- Standard Purity (≥95%)
- 95–97%
- Minor deletion sequences, counterion salts
- Most in vitro and in vivo research applications
- High Purity (≥98%)
- 98–99%
- 75–90%
- Trace deletion sequences, controlled counterion load
- Required
- Dose-sensitive studies, receptor binding assays
- Ultra-High Purity (≥99%)
- ≥99%
- 80–95%
- Minimal detectable impurities, verified counterion identity
- Required with peptide content analysis
- Clinical-grade research, GMP-adjacent applications, studies requiring absolute reproducibility