Testosterone Suspension 100mg/mL | 20-Vial Kit

Testosterone Suspension 100mg/mL Injectable | 20-Vial Kit

Testosterone Suspension 100mg/mL — unesterified aqueous testosterone, immediate-onset, 20-vial kit. ≥99% HPLC purity, MS confirmed, Janoshik COA. Research use only.

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

$430

QSC RESEARCH GRADE

≥99% HPLC PurityMS ConfirmedJanoshik COAIn-House Synthesis1-Region Domestic Shipping

What is Testosterone Suspension?

Testosterone Suspension (Unesterified aqueous testosterone suspension (injectable)) is pure testosterone — C₁₉H₂₈O₂, MW 288.4 — without any ester modification, suspended in aqueous vehicle. Unesterified testosterone has the fastest onset of any injectable testosterone form (peak ~2–4h, active ~24–48h). Directly available for immediate AR activation without ester hydrolysis step. Fully aromatises to oestradiol via CYP19A1.

Research Applications

Immediate Androgen Delivery

No ester hydrolysis required — fastest-acting injectable testosterone for acute AR activation studies

Androgen Receptor Biology

Direct unmodified testosterone AR binding and nuclear signalling

Pharmacokinetic Reference

Pure testosterone PK reference compound for ester comparison studies

Aromatisation Research

Complete CYP19A1 aromatisation — rapid oestradiol elevation studies

HPG Axis Feedback

Rapid onset suppression of hypothalamic-pituitary-gonadal axis

Quick Specs

Form	Aqueous suspension (unesterified)
Concentration	100mg/mL
CAS	58-22-0
Molecular Formula	C₁₉H₂₈O₂
MW	288.4 Da
Purity	≥99% by HPLC — every batch
Identity	MS molecular weight confirmed — every batch
COA	Janoshik-independent, publicly verifiable
Vehicle	Aqueous vehicle — shake well before use
Aromatisation	Full — converts to oestradiol via CYP19A1
Storage	2–8°C \| Do not freeze
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 is QSC Testosterone supplied?

QSC Testosterone esters are supplied as ready-to-use oil-based injectable solutions — no reconstitution required. Each vial contains the stated concentration in pharmaceutical-grade carrier oil. Warm the vial briefly in your hand before drawing.

How should injectable Testosterone be stored?

Store at room temperature (15–25°C), away from direct sunlight. Oil-based testosterone solutions are stable for 2–3 years properly stored. Do not refrigerate as this can cause crystallisation of the ester in the oil.

What purity is QSC Testosterone and how is it verified?

QSC Testosterone injectable solutions are ≥99% HPLC pure 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