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For Research Use Only. Not for human or veterinary consumption, diagnostic, or therapeutic use. Sold exclusively to qualified research professionals.

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For Research Use Only. Not for human consumption.

LL-37 research peptide vial

100 in stock

  • ≥99% Purity (HPLC)
  • 3rd-Party Verified
  • Research Use Only
  • Trusted by Researchers
  • HPLC Verified

99.6%

Independent purity assay

  • Tested

US ISO-Accredited Lab

Janoshik Analytical · ISO 17025

3rd-Party Verified Purity

  • 99.2%
View Certificate of Analysis — LL3-261419-010
View COA
Description
LL-37 is a 37-amino-acid cathelicidin-derived antimicrobial peptide used in in vitro research on bacterial membrane disruption, innate immunity, and host-defense signaling.
  • Purity: ≥99% by HPLC
  • Molecular formula: C205H340N60O53
  • Molecular weight: 4493.3 g/mol
  • CAS: 154947-66-7
  • Form: Lyophilized powder
  • Storage: -20°C, protect from light
  • Third-party verified COA included with every batch
For research use only. Not for human or veterinary use.
Shipping & Returns

Free standard shipping on orders over $200

Express shipping available at checkout

All sales are final — no returns or exchanges, as these are research-use peptides

Orders ship in discreet, tracked packaging

Storage & Handling

Store sealed lyophilized vials at -20°C, protected from light and moisture

Short-term storage (up to 30 days) acceptable at 2–8°C in original packaging

Avoid repeated freeze-thaw cycles

For research use only — handle according to your laboratory’s standard safety practices

LL-37

4.9 (412 verified reviews)

30 researchers bought this in the last 24 hours

$47.99

100 in stock

This batch · 99.1% HPLC · Lot LL3-261419-010 · JanoshikView COA →
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Estimated Delivery

Order in 10h 36m for same-day shipping

Order placed

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Fulfillment

Today

Shipped

Tomorrow

Delivered

2–4 days

Discreet packaging · Cold-chain where required · Fully tracked

Third-Party Tested

Independent HPLC purity verification

Discreet Packaging

Plain box, no branding outside

Free Reship if Damaged

Arrives broken? We send a new one

Reship policy: If your order arrives damaged or contaminated, we will reship a replacement free of charge. Refunds are not offered, only replacements, so every shipment is protected.

Bulk / Institutional Pricing

Ordering 10+ vials? Get a custom quote with volume-tier pricing and purchase order terms.

Same-Day Ship

Order by 2pm ET

COA per Batch

HPLC + Mass Spec

Discreet

Plain packaging

Verified Researcher Reviews

From qualified research professionals — institutional affiliation verified

4.9

(412 verified)

★ ★ ★ ★ ★

Everything arrived exactly as described with excellent packaging and clear documentation. The batch details were easy to verify, and the overall experience reflected a high level of professionalism.

Brody Harrison Verified Researcher
★ ★ ★ ★ ★

Great purchasing experience overall. Delivery arrived one day later than expected, but the premium packaging, complete documentation, and professional presentation made it worthwhile.

Wyatt Collins Verified Researcher
★ ★ ★ ★ ★

Outstanding attention to detail. The vial was securely sealed, the labeling was accurate, and the COA matched the batch information perfectly. I appreciate the consistent quality.

Gavin Thornton Verified Researcher
★ ★ ★ ★ ★

Very impressed with the quality of the packaging and documentation. Shipping was fast, the product arrived in perfect condition, and the ordering process was smooth and reliable.

Declan Mercer Verified Researcher
★ ★ ★ ★ ★

Excellent experience from checkout to delivery. The product arrived securely packaged with clear batch labeling, and the Certificate of Analysis was simple to verify. Everything was handled professionally from start to finish.

Carson Bennett Verified Researcher

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Frequently Asked Questions

Everything researchers ask before ordering peptides.

All orders ship in plain, discreet packaging with no external branding. Tracking is provided by email within 24 hours. Lyophilized peptides are temperature-stable in transit and do not require refrigerated shipping.

Sealed and stored at −20°C, the lyophilized powder remains stable for 24+ months.

Yes. Every order ships with a batch-specific COA from an independent ISO/IEC 17025 accredited lab. You can preview the current batch COA above before ordering.

We accept all major credit cards and select alternative methods. Charges appear under a discreet, non-descriptive merchant name on your statement.

We ship within the United States only at this time. International researchers should review their local regulations regarding research-use peptides before placing inquiries.

Store sealed lyophilized vials at -20°C, protected from light and moisture, in the original packaging. Short-term storage (up to 30 days) at 2–8°C is acceptable. Avoid repeated freeze-thaw cycles.

Because these are research-use peptides, all sales are final. If your order arrives damaged or incorrect, contact us within 7 days and we will reship or refund.

No. All products are sold strictly For Research Use Only (RUO). They are not drugs, supplements, cosmetics, or food and are not intended for human or veterinary consumption.

Frequently Researched Together

Other catalog compounds frequently viewed by researchers.

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Made in USA

ISO 9001 certified facility

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3rd-Party Tested

Janoshik Analytical

8,000+ Labs

Trusted since 2021

92% Reorder Rate

Within 60 days

Purity Guarantee

Every vial meets ≥99% purity or we replace it. If it doesn't match its COA, we make it right.

Same-Day Ship from New York

Orders placed by 2pm ET ship the same day from Fifth Avenue. Discreet, tracked, insured.

3rd-Party Verified

Every batch is independently tested by accredited labs. COA published before it ships.

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Certificate of Analysis

LL-37

Independently tested by Janoshik Analytical, s.r.o.

BatchLL3-261419-010
Test MethodRP-HPLC + LC-MS
ManufacturedMarch 26, 2026
TestedApril 7, 2026
ExpiresApril 2028
LaboratoryISO/IEC 17025 accredited
Overall Purity 99.1%

PASSED ALL TESTS

Analytical Results

Test Result Specification Status
Identity (LC-MS) Confirmed Conforms PASS
Purity (HPLC-UV) 99.1% ≥ 98.0% PASS
Related substances < 1.0% ≤ 2.0% PASS
Water content (KF) 1.8% ≤ 5.0% PASS
Residual solvents Not detected ICH Q3C PASS
Heavy metals (ICP-MS) < 1 ppm ≤ 10 ppm PASS
Bacterial endotoxins < 0.125 EU/mg ≤ 0.5 EU/mg PASS
Sterility Pass USP USP PASS

This Certificate of Analysis is issued by an independent ISO/IEC 17025 accredited laboratory and verifies the identity, purity, and quality of the batch listed above. A copy is shipped with every order.