Batch 20260822-1 · cosmetic grade
Tetrapeptide-21
TR21P · INCI Tetrapeptide-21 · CAS Not assigned
A short peptide for firmness claims. Released with a wider acetic acid tolerance than the rest of the range, which is normal for this sequence.
| Test item | Specification | Result |
|---|---|---|
| Appearance | White to off-white powder | Complies |
| Identity by ESI-MS | Theoretical MW 389.40 | Complies |
| Purity (HPLC) | ≥ 95.0% | 96.56% |
| Water content (K.F.) | < 7.0% | 3.51% |
| Acetic acid content | < 25.0% | 5.64% |
| Solubility | ≥ 2 mg/ml in water | Complies |
| Manufacturer | Leon (Nanjing) Biotechnology | |
| Reference standard | Enterprise standard · cosmetics grade | |
| Packaging | Sealed container; outer aluminium foil bag | |
| Shelf life | Two years when stored as directed | |
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