Lab Verified — Every Compound, Every Batch.
Every compound in the Apex catalog is screened by HPLC for chromatographic purity and ESI-MS for molecular identity before it enters inventory. This archive collects the current shipping batch for all 74 verified compounds — 99.67% average purity across the catalog. In-house analytical release, with Janoshik as our third-party testing partner.
Filter by category, search by compound or batch ID, and sort by purity or test date. Click any card to expand the full Apex Certificate of Analysis inline.
Compound Archive
How Each Batch Is Verified
Every lot is screened on two orthogonal analytical instruments before release.
HPLC — Purity
High-Performance Liquid Chromatography separates the sample on a reversed-phase column and reports purity as a percentage of total UV-absorbing peak area at the target wavelength. A "≥99%" specification means the main compound peak accounts for at least 99% of the integrated area, with retention time matching the reference standard and baseline resolution from any minor peaks.
ESI-MS — Identity
Electrospray Ionization Mass Spectrometry confirms molecular identity. Smaller compounds are identified by the [M+H]⁺ ion and isotope envelope; larger peptides (≥3,000 Da) are confirmed across multiple charge states — typically [M+2H]²⁺, [M+3H]³⁺, [M+4H]⁴⁺ — that all back-calculate to the same parent mass.
Sign-Off — Release
A 100% reading is not the goal: instrumental noise, baseline drift, and naturally occurring isotopologues set a practical ceiling. ≥99% on both methods, plus an analyst sign-off documenting chain of custody and dual review, is what releases a batch into inventory.
Apex works with Janoshik as our third-party testing partner.
Janoshik provides independent analytical testing for research compounds. This page remains the Apex batch archive for current shipping lots, with HPLC purity, ESI-MS identity, batch ID, and test date kept in one searchable record.
Frequently Asked Questions
How can I verify these COAs are authentic?
Each report on this page is the actual analytical record for the lot currently in inventory — the same chromatogram, mass spectrum, batch number, and analyst sign-off that ships with the product. Cross-reference the batch ID on the COA with the batch ID on the vial you receive; they should match exactly. If they don't, email support@apexlaboratory.org and we'll reconcile the record.
What does 99.5% purity actually mean?
It is an HPLC peak-area measurement, not a mass percentage. The main compound peak accounts for at least 99.5% of the integrated UV-absorbance area at the analytical wavelength. The remaining ≤0.5% reflects minor synthesis-related impurities, residual solvent peaks, or instrumental noise. Purity by HPLC is a chromatographic specification — molecular identity is confirmed separately by mass spectrometry.
How is each batch verified?
Every batch is screened by Apex with HPLC for purity and ESI-MS for molecular identity before release. Apex also works with Janoshik as our third-party testing partner for independent analytical verification.
What's the difference between HPLC and Mass Spec?
They answer different questions. HPLC asks "how pure is the sample?" — it separates the mixture and quantifies each component as a fraction of total peak area. Mass spectrometry asks "is this the right molecule?" — it ionizes the sample and measures mass-to-charge, confirming molecular weight and structural identity. A compound can be 99.9% pure (HPLC) and still be the wrong molecule (MS). Running both is the point.
Can I get the COA for a specific batch I purchased?
Yes. Email support@apexlaboratory.org with the batch ID printed on your vial and we will retrieve the original analytical record from the lot release file. Historical batches are archived; retrieval is not always instant, but every released batch has a record on file.
Where can I find third-party testing information?
Janoshik is Apex Laboratory's third-party testing partner. This archive organizes Apex release records by compound and batch while linking directly to our partner laboratory.
How often do you re-test inventory?
Each lot is tested once at release. Inventory is not re-screened on a schedule because the analytical signature does not drift in a sealed lyophilized vial stored at -20°C. Lots are re-tested if storage conditions are compromised, if a vial is returned for QA review, or if a new analytical method warrants re-verification. The COA on this page reflects the current shipping lot for each compound.
What if my own analysis shows different results?
Expect some variation. Different columns (C18 vs C8, particle size, pore size), different gradient profiles, different mobile-phase modifiers, and instrument-to-instrument calibration differences will all shift retention times and can change reported peak-area percentages by tenths of a percent. Mass spec ionization efficiency varies by instrument and source geometry. If your numbers diverge meaningfully from ours, email support@apexlaboratory.org with your method conditions and the data — we will compare against our release record and respond with a technical reconciliation.
