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LL-37 research vial
Research compound

LL-37

LL-37 is the 37-residue cationic antimicrobial peptide derived from human cathelicidin (hCAP18). It has been studied in experimental models of innate immunity, antimicrobial activity, biofilm disruption and immunomodulation.

CAS Number154947-66-7
Molecular FormulaC205H340N60O53
Molecular Weight4493.3 g/mol
Available as5mg
Latest lot260623LL53 · Jul 20, 2026

For in-vitro laboratory research only. Not for human or veterinary use.

Reference data

CAS#154947-66-7
FormulaC205H340N60O53
M.W.4493.3 g/mol
Purity99.24% HPLC (latest lot)
Research use only · not for human or veterinary use

Lab reports

Lot 260623LL53 · 5mg
Tested Jul 20, 2026
99.24% HPLCView

Storage & handling

Store lyophilized material at -20°C, protected from light and moisture.

Handle in a laboratory setting using appropriate personal protective equipment.

Questions about LL-37

What is LL-37?

LL-37 is the 37-residue cationic antimicrobial peptide derived from human cathelicidin (hCAP18). It has been studied in experimental models of innate immunity, antimicrobial activity, biofilm disruption and immunomodulation.

What is the CAS number of LL-37?

The CAS registry number of LL-37 is 154947-66-7.

What is the molecular formula and weight of LL-37?

Molecular Formula: C205H340N60O53. Molecular Weight: 4493.3 g/mol.

How is LL-37 tested?

Every lot of LL-37 is analysed by an independent, third-party laboratory using HPLC for identity and purity. The Certificate of Analysis for each lot — lot number, test date and result — is published and listed on this page.

How should LL-37 be stored?

Store lyophilized material at -20°C, protected from light and moisture.

Is LL-37 for human use?

No. LL-37 is sold strictly for in-vitro laboratory research by qualified researchers aged 21 and over. It is not for human or veterinary use and is not a drug, food, supplement or cosmetic.

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