Certificate of analysis
Sample document
LL-37 5mg
99.87%Purity
- Batch
- OP-LL5-0726
- Tested
- Jul 26, 2026
- Method
- See original report
- Lab
- Janoshik Analytical
Published COAs
Check the COA before you order.
Review available lot-specific Certificates of Analysis for the laboratory, test methods and reported results. Match the lot number on your label to the report; cap color alone does not identify a batch.
- HPLC-verified purity Consult the lot report for the measured purity and test method.
- Independent US labs Tested by third parties, not in-house.
- Matched to your lot Batch numbers trace each result to the vial you receive.
Featured in the catalog
Featured research materials.
Every batch ships with a third-party COA. For laboratory research use only.
Research procurement
Ordering options for your laboratory.
Explore monthly boxes, volume pricing, shared research bundles and membership points.
- Build a BoxNew40%offPick any 4, every month.4 vials of your choice at 40% off list price. Amino H₂O free in every box. Swap any vial before the next delivery. Delivery confirmed at checkout Up to 6 boxes a month Cancel after month 3Build your box
- Research bundlesNew35%Off, for them2.5×Base points per $1Build it once. Share it anywhere.Build a bundle
- Bulk ordersNewUp to20%From 3 units per cart line. Final pricing and delivery are confirmed at checkout.Order in bulk
- MembershipFree to joinUp to10×Points per $1 on every order, spent like cash at checkout.See the plans
- 28ProductsExplore the current catalog
- $7.95Standard shippingFree from $199
- 20%Quantity pricingFrom 6 units per line
- 2.5×Base points ratePoints earned per $1
Shipping & support
Ordered by 1:30 PM CT, shipped today.
Orders placed before 1:30 PM CT ship on our scheduled shipping days. Later orders ship on the next scheduled day.
Mon · Tue · Wed · Thu · Fri · Sat
1:30 PM CTsame-day cutoff
- Mon : ships
- Tue : ships
- Wed : ships
- Thu : ships
- Fri : ships
- Sat : ships
- Sun : no shipping
Questions?
Call or email our support team.
- +1 512 555 0148Phone support
- support@offlinepeptides.comEmail support
- 100 Research Way, Austin, TX 78701, US
Most messages get a reply the same business day.
FAQ
Questions, answered.
Something else? Call +1 512 555 0148 or email support@offlinepeptides.com.
How fast do orders ship?
Orders before 1:30 PM CT ship on our scheduled shipping days. See the shipping policy for exceptions.
Where can I see test results?
Find available lot-specific reports in the COA library. Match the lot number on the label to the certificate and contact support if the relevant report is missing.
What payment methods do you accept?
Available payment methods are shown at checkout. Contact support if the method you need is unavailable.
How do I reach you?
Call +1 512 555 0148 or email support@offlinepeptides.com. Most messages get a reply the same business day.
Are these products for human use?
No. Materials are for qualified in-vitro laboratory research and analytical use only. Not for human or animal consumption, therapeutic, clinical, diagnostic or cosmetic use, dietary supplementation, dosing, injection, ingestion or administration.
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Research use only
For the laboratory. Nothing else.
Offline Peptides supplies analytical-grade biochemical reference standards and laboratory research materials to qualified research customers. Materials are intended exclusively for in-vitro research, analytical method development, identity verification, and laboratory evaluation. Products are not intended for human or animal consumption, therapeutic use, clinical use, diagnostic use, dietary supplementation, dosing, injection, ingestion, or administration of any kind.
- Materials are not for human or animal consumption, therapeutic, clinical, diagnostic or cosmetic use, dietary supplementation, dosing, injection, ingestion or administration.
- Product information describes chemical identity and analytical documentation, without health, cosmetic or performance claims.
- Human or animal use, personal use and resale for those purposes are prohibited.
- Each product is supported by lot-level documentation, including Certificate of Analysis access where available. A COA does not establish suitability for human or animal use.
- We do not provide dosing, preparation, administration or treatment guidance.
- Buyers must confirm qualified laboratory use and are responsible for professional handling, storage and disposal under applicable requirements.