Standards · Process · Transparency

Quality & Handling

Every product is independently tested for purity before it ships, with additional analyses performed when possible. This page explains exactly what we test, how to store your research compounds, and how to reconstitute them correctly.

Testing Protocol Understanding COAs Storage Reconstitution Shipping Integrity
01 — Testing Protocol

How we verify our products

No product enters our catalogue without completing independent third-party purity testing. Additional analyses — molecular mass and endotoxin screening — are performed when possible. We publish the actual results as a Certificate of Analysis on our Lab Results page, rather than simply declaring a "pass."

Test 01
🔬
HPLC Purity
High-performance liquid chromatography measures the purity of the compound against a reference standard. Our specification is ≥99%. We publish the exact figure, not just a pass mark.
Spec: ≥99.0%
Test 02
⚖️
Mass Confirmation
Liquid chromatography–mass spectrometry (LC-MS) confirms the molecular weight, providing definitive identity verification independent of the purity result. Catches truncated sequences and isomers.
Identity confirmed
Test 03
🧪
Endotoxin Screening
The LAL (Limulus amebocyte lysate) test screens for bacterial endotoxins — a critical safety marker many suppliers skip entirely. Our specification is <5 EU/mg.
Spec: <5 EU/mg
🏛️
Independent & Third-Party
Testing is performed by independent third-party laboratories — never in-house, never self-reported.
📋
Published Per Batch
Each tested batch carries its own Certificate of Analysis, published on our Lab Results page — generic certificates are meaningless.
🔢
Verifiable
Batch numbers are published on the Lab Results page where available, so you can match your vial against its COA.
Test Method Specification
Purity HPLC-UV 220nm ≥99.0%
Molecular Mass LC-MS Theoretical ± tolerance
Bacterial Endotoxins LAL <5 EU/mg

Actual results for each tested batch — including which tests were performed — are published on our Lab Results page.

02 — Certificate of Analysis

How to read a COA

A Certificate of Analysis is the primary accountability document in research-compound supply. Where a product has completed testing, its COA is published on our Lab Results page. Here's what each section tells you.

Certificate of Analysis#PP2614
CompoundTirzepatide
Batch / DatePP2614 · Jun 2026
HPLC Purity99.2%
Mass (LC-MS)4813.4 g/mol
Endotoxins (LAL)<0.5 EU/mg
Result✓ All Pass
1
Batch number
Where available, a COA is batch-specific, and the batch number on your vial should match it. A generic certificate not tied to a specific batch carries less weight. If a batch number doesn't exist for a given test, we won't fabricate one — the COA reflects that.
2
HPLC purity — the key number
Look for the actual percentage, not just "pass." We publish the real result (e.g. 99.2%) because it shows we're comfortably within spec, not squeaking past it.
3
Mass confirmation
LC-MS provides independent identity confirmation beyond purity. It catches truncated sequences and structural isomers that a purity test alone cannot distinguish.
4
Endotoxin result
A critical safety marker measured in EU/mg, often omitted by other suppliers entirely. Our specification is <5 EU/mg — see the Lab Results page for the actual measured result on batches where this test has been completed.
03 — Storage Guidelines

Maintaining compound integrity

Improper storage is the most common cause of peptide degradation outside the laboratory. These guidelines apply to all Pacific Peptides lyophilized products unless the specific product page states otherwise.

🧊
Lyophilized (Sealed)
−20°C
Long-term storage
Shelf life: 24 months from manufacture at −20°C
Keep in the sealed vial until ready to reconstitute
Protect from light and moisture
Reach room temperature before opening to prevent condensation
🧫
Reconstituted
2–8°C
Refrigerated · use within 28 days
Keep refrigerated — stable up to 28 days with bacteriostatic water
Use aseptic technique — wipe the stopper with 70% IPA each time
Do not freeze the reconstituted solution
Label with the reconstitution date; discard if cloudy
🚚
During Transit
≤25°C
Lyophilized powder is stable
Lyophilized peptides are stable at ambient temperature for standard Canada Post transit (2–7 days)
Refrigerate on arrival — don't leave in a warm vehicle or mailbox
✓ Safe practices
✓
Freeze-thaw cycles on lyophilized powder — no degradation
✓
Aliquoting reconstituted stock and returning the remainder to the fridge
✓
Using bacteriostatic water to extend working stability to 28 days
✗ Avoid
✗
Freezing the reconstituted solution — ice crystals disrupt peptide structure
✗
Shaking or vortexing — gentle swirling only
✗
Reconstituting with tap water, saline, or unpurified solvents
04 — Reconstitution Protocol

Step-by-step reconstitution

Provided for qualified researchers conducting in-vitro research only. This is not medical advice. Each product page also includes a live calculator that updates with the selected vial size.

1
Gather materials
Bacteriostatic water (0.9% benzyl alcohol), sterile syringe, 70% IPA swabs, and your sealed vial at room temperature.
Bacteriostatic water available as an add-on
2
Sterilise stoppers
Wipe the rubber stoppers of both vials with 70% IPA and allow to air-dry for 30 seconds. Don't touch them afterward.
3
Add solvent slowly
Direct the liquid stream down the inside glass wall — never onto the lyophilized powder directly. Add slowly.
Aim at the glass wall, not the powder
4
Dissolve gently
Gently swirl — do not shake or vortex. The powder should dissolve within 60–120 seconds. The solution should be clear.
5
Label & store
Label with compound, batch, date, and concentration. Keep refrigerated and use within 28 days.
Choosing a solvent
Solvent
Stability
Notes
Bacteriostatic water ✓
28 days
Recommended. 0.9% benzyl alcohol suppresses microbial growth for multi-use vials.
Sterile water
7 days
Acceptable for single-use. No preservative — use promptly.
Saline / tap water
—
Not recommended. Solubility and contamination risks.
💡 Each product page has a live reconstitution calculator — select your vial size and solvent volume to see the resulting concentration instantly.
05 — Shipping Integrity

From our lab to yours

Compound integrity doesn't stop at the lab door. Our shipping protocol maintains stability, protects vials from damage, and ensures complete discretion.

Packaging Protocol
📦
Plain packaging, no exterior branding. No company or product names visible on the outside.
✉️
Generic return address. Discreet by design.
🫧
Cushioned inner packaging protects vials against mechanical shock.
Delivery & Carriers
🍁
Canada only. Dispatched domestically — no customs risk.
📮
Canada Post Expedited — fully tracked, 2–7 business days.
⚡
Xpresspost upgrade available at checkout for priority delivery.
🆓
Free shipping over $350 CAD, shown in cart with a progress bar.
Research-Grade · Canada
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