Testosterone Base 100mg/mL | No Ester | 20-Vial Kit

Testosterone Base (No Ester) 100mg/mL Injectable | 20-Vial Kit

Testosterone Base (No Ester) 100mg/mL — unesterified oil-suspended 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 China (🇨🇳)

$470

QSC RESEARCH GRADE

≥99% HPLC PurityMS ConfirmedJanoshik COAIn-House SynthesisChina Warehouse

What is Testosterone Base (No Ester)?

Testosterone Base (Unesterified testosterone in oil suspension — injectable) is pure testosterone — C₁₉H₂₈O₂, MW 288.4 — without any ester, formulated in oil-based suspension. Unlike testosterone suspension (aqueous), the oil-based format slows release slightly vs aqueous. No ester hydrolysis required — direct AR activation. Ultra-short active window (peak ~4–8h in oil, active ~24–48h). Fully aromatises via CYP19A1. Research reference compound for all testosterone ester pharmacokinetic comparisons.

Research Applications

Unesterified Testosterone Reference

Pure testosterone PK reference — no ester hydrolysis step, direct AR activation

Androgen Receptor Biology

Direct testosterone AR binding without ester modification confounds

Pharmacokinetic Ester Comparison

Oil-base vs aqueous suspension vs esterified forms — onset and duration comparison

Aromatisation Research

Complete CYP19A1 oestradiol conversion — rapid oestrogenic activity onset

HPG Axis Research

Rapid suppression and recovery kinetics of the hypothalamic-pituitary-gonadal axis

Quick Specs

Form	Oil-based 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	Pharmaceutical-grade carrier oil + benzyl alcohol/benzoate
Aromatisation	Full — converts to oestradiol via CYP19A1
Storage	Room temp sealed \| 2–8°C recommended
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.

🌏 Shipping: China warehouse — 7–14 day global delivery