KPV specifications and molecular characteristics
The technical specification for KPV, the KPV research material supplied by KPV Labs: molecular formula C16H30N4O4, average molecular weight 342.43 g/mol, 3 residues, supplied as a lyophilized powder. Each item is explained below.
Last updated
Specification table
| Product | KPV |
|---|---|
| Type | Synthetic tripeptide |
| Molecular formula | C16H30N4O4 |
| Molecular weight | 342.43 g/mol (average) |
| Length | 3 residues |
| Sequence | KPV |
| N-terminus | Free amine (Lys1) |
| C-terminus | Free acid (Val3) |
| CAS number | 67727-97-3 |
| Form | Lyophilized powder |
| Vial sizes | 10 mg |
| Purity specification | ≥95% (HPLC-UV) |
| Purity, current lots | 99.69% |
| Identity specification | Confirmed by HPLC retention-time match |
| Testing laboratory | ILS Laboratories (independent) |
| Storage | Store sealed, dry and protected from light at the temperature stated on the vial label. Allow a cold vial to reach room temperature before opening. |
| Designation | Research use only |
Current lot results against specification
Every current lot meets the release specification. Current lots test at 99.69% by HPLC-UV against a specification of ≥95%, and identity is confirmed by HPLC retention-time match on every lot.
KPV molecular formula
The molecular formula of KPV is C16H30N4O4.
KPV molecular weight
The average molecular weight of KPV is 342.43 g/mol. "Average" means it is calculated from natural isotope abundances.
KPV sequence
KPV
Structure and modifications
KPV is linear with a free N-terminal amine and a free C-terminal acid. In α-MSH this same segment ends in an amide (Val-NH2); the tripeptide supplied here is the free acid, which is the form the formula and molecular weight describe.
Physical form
Lyophilized powder, recorded as the appearance on every certificate. Lyophilization (freeze-drying) removes water, which slows most chemical degradation. What lyophilized means.
Purity and identity specifications
KPV Labs’ stated release specification is ≥95% HPLC-UV purity with identity confirmed by HPLC retention-time match against a reference standard. The current lot, KB-96378, reported 99.69%. How purity is measured, or how specifications fit into the quality and supply-chain process.
Analytical and testing methods
HPLC-UV for purity, HPLC-RTM for identity and laboratory quantitation for net content, performed on every lot by ILS Laboratories. Each lot is also screened for fentanyl by immunoassay. LAL endotoxin testing (USP <85>) and PCR microbial screening are reported for lots where they were run. Testing and quality control.
Research designation
KPV is designated research use only: supplied for laboratory research by qualified personnel. Research use only policy.
Buy KPV
10 mg vials. Current lot KB-96378 tested at 99.69% purity with identity confirmed by HPLC retention-time match against a reference standard. Current purchasing is available through Klow.bio.