Sildenafil 100mg Tablets | 100-Count | Viagra Analog

Sildenafil 100mg Tablets | 100-Count | PDE5 Inhibitor | Viagra

QSC Sildenafil (Viagra — first-in-class PDE5 inhibitor) — ≥99% HPLC purity, MS confirmed, Janoshik COA. Research use only.

✓ 99%+ Purity	✓ COA Available
✓ Free Shipping on All Orders	✓ Ships from Domestic Warehouses (🇺🇸) + China (🇨🇳)

$130

QSC RESEARCH GRADE

≥99% HPLC PurityMS ConfirmedJanoshik COAIn-House SPPS1-Region Domestic Shipping

What is Sildenafil?

Sildenafil (Viagra/Revatio) is the first-in-class PDE5 inhibitor — selective for PDE5 over PDE6 (10×) and PDE1 (80×). Half-life ~4hr — suitable for acute response and dose-response studies. FDA-approved for erectile dysfunction and PAH (Revatio). Reference compound for NO/cGMP pathway research. CAS 139755-83-2.

Research Applications

NO/cGMP Reference Compound

First-in-class PDE5 inhibitor — foundational cGMP signalling

Acute PDE5 Inhibition

4hr half-life — acute onset/offset and dose-response kinetics

Pulmonary Hypertension

Revatio indication — pulmonary vascular resistance research

PDE Selectivity Profile

PDE5 vs PDE6 vs PDE1 selectivity — comparative PDE pharmacology

vs Tadalafil Comparison

Short-acting vs long-acting PDE5 — duration studies

Quick Specs

Form	Tablet — 100mg per tablet, 100-tablet bottle
CAS Number	139755-83-2
Molecular Formula	C₂₂H₃₀N₆O₄S
Molecular Weight	474.6 g/mol
Compound Type	PDE5 Inhibitor
Purity	≥99% by HPLC — every batch
Identity	MS molecular weight confirmed — every batch
COA	Janoshik-independent, publicly verifiable
Manufacture	In-house synthesis — Qingdao, China
Storage	Room temperature sealed \| cool, dry storage
Shelf Life	24 months unopened

Certificate of Analysis (COA)

For the latest Certificate of Analysis (COA), please email us with your request.

Frequently Asked Questions

How are QSC research tablets supplied?

QSC research tablets are supplied as pre-dosed oral tablets at the stated concentration. No reconstitution is required. Each tablet is compressed at uniform dose for consistent dosing in research applications.

How should research tablets be stored?

Store at room temperature (15–25°C) in a cool, dry place away from moisture, heat, and direct sunlight. Keep in the original container. Properly stored tablets remain stable for 2–3 years.

What purity are QSC research tablets and how is it verified?

QSC research tablets contain active ingredient at ≥99% HPLC purity before tableting, with MS-confirmed identity on every batch. COA is published on the product page and independently verifiable at verify.janoshik.com.

🧪 Peptide Research Tools: Use QSC’s free peptide calculators — reconstitution, BAC water, dosing, half-life, and mixing charts.

🌍 Domestic shipping: 🇺🇸 USA · 🌏 International: China warehouse — 7–14 day global delivery