Build-A-Kit: 10% off every compound vial · 15% at 2 · 20% at 5 · 25% at 10 · 35% at 20. Every compound in your cart counts · pay with Zelle for an extra 5% | Verified government, military, and public safety organizations get 25% via VerifyPass (excludes other offers)

Build-A-Kit: 10% off every compound vial · 15% at 2 · 20% at 5 · 25% at 10 · 35% at 20 · extra 5% with Zelle
Verified government, military, and public safety organizations get 25% via VerifyPass (excludes other offers)

Research use only · ISO 17025-accredited analysis

Tested 15 ways.
Traceable to the vial.

Every lot moves through a 15-point analytical panel, published to a live ledger, so any batch we’ve shipped can be checked against its certificate.

Trusted by 21,000+ registered researchers
99.4%
Median purity
100%
Compounds for sale with a published COA
Same day
Ships by 2PM PT · Sat 11AM
Live batch ledger updated Sep 1, 2026
54
Lots
published
33
Compounds
tested
15
Checks
per lot

Every lot screened for

IdentityChromatographic purityAssay / net contentSterility ×2 methodsEndotoxins (LAL)Fent screenHeavy metals ×5 (ICP-MS)Residual solvents ×16 (GC-MS)Container closureSolubilityResidual TFA
Why researchers choose Solyn

“99% pure” isn’t the same as “99% peptide”

Purity grades how clean the peptide is. It does not say how much of the vial is peptide, or whether it’s sterile, unadulterated, and what the label says for your exact lot. We measure all of it and publish it.

How a vial’s contents break down · illustrative, not a specific lot
Everything else Counterions, residual water and salts. Real mass in the vial, but not peptide. Net peptide content The actual milligrams of peptide you receive. Weighed, and published per lot.
Purity, measured in %
Grades how clean the peptide fraction is. A high number says the peptide has few related impurities. It says nothing about how much peptide is in the vial.
Net peptide content, measured in mg
Weighs the peptide you actually receive against the label claim. A vial can be highly pure and still contain less peptide than the label says.

Two different questions. Most suppliers answer only the first. We publish both, on every lot.

Purity is table stakes. Here’s what a purity number can’t tell you.

What we verify
Typical supplierPurity % only
Solyn15 checks, published per lot
Identity & potency
One purity figure
Identity (HPLC-UV/VIS)Chromatographic purityAssay: net content vs label
Contamination & safety
Rarely published
Sterility: 2 independent methods (ScanRDI + USP)Endotoxins (LAL)Fent screeningHeavy metals ×5 (ICP-MS)Residual solvents ×16 (GC-MS)
Physical integrity & stability
Rarely published
Container-closure (dye ingress)Solubility in 2 mL waterResidual TFA (ion chrom.)
Certificate
On request, often generic
Published per lot to the live batch ledger. Verify the exact vial you received.
“Typical supplier” = category baseline, not a named competitor. Claims describe what is publicly published, not internal practice (FTC).
Free shipping over $200Same-day dispatch by 2PM PT Mon–Fri, Saturday by 11AM.
Independently testedThird-party labs incl. Vanguard Laboratory (ISO/IEC 17025:2017, A2LA Cert. No. 6377.01.01)
Secure checkoutEncrypted payment processing. Questions? (805) 708-3660.
Accepted:VisaAmexDiscoverZelle: extra 5%SSL secured
Shipping & returns →

All products are sold strictly for in-vitro laboratory research use only (RUO). Not for human or veterinary use. Not a drug, food, or cosmetic. Solyn is a research chemical supplier and does not operate as a compounding pharmacy or outsourcing facility.

33 products tested 54 batches published latest certificate Sep 1, 2026