Sustanon | High-Concentration Quad-Ester Testosterone

Sustanon 400 (Testosterone Propionate 48mg + Testosterone Phenylpropionate 96mg + Testosterone Isocaproate 96mg + Testosterone Decanoate 160mg) 400mg/mL Injectable | 10-Vial Kit

Sustanon 400mg/mL — quad-ester testosterone blend (high-concentration 400mg/ml) research injectable, 10-vial kit. ≥99% HPLC purity, MS confirmed, Janoshik COA. Research use only.

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

$310

QSC RESEARCH GRADE

≥99% HPLC PurityMS ConfirmedJanoshik COAPharmaceutical-GradeChina Warehouse

What is Sustanon 400 (Testosterone Propionate 48mg + Testosterone Phenylpropionate 96mg + Testosterone Isocaproate 96mg + Testosterone Decanoate 160mg)?

Sustanon 400 is a high-concentration quad-ester testosterone preparation at 400mg/mL — a 60% increase over the original Sustanon 250 formula. Maintains the same four-ester ratio (propionate/phenylpropionate/isocaproate/decanoate) in proportional scaling. Provides equivalent multi-phase release kinetics at higher concentration, enabling higher testosterone delivery per injection volume. Research use only.

Research Applications

High-Concentration Testosterone PK

400mg/mL vs 250mg/mL — dose-volume normalised serum AUC comparison

Multi-Phase Androgen Kinetics

Four-ester serum profiling at increased total concentration

HPG Axis Suppression

Dose-dependent LH/FSH suppression, GnRH pulsatility, spermatogenesis inhibition

Volume-Dose Tolerability

Injection site bioavailability, tissue depot characteristics at 400mg/mL

Sustained Androgen Research

Long-duration testosterone exposure modelling via decanoate-dominant formulation

Quick Specs

Form	Injectable solution
Concentration	400mg/mL
CAS	57-85-2 / 1255-49-8 / 15262-86-9 / 5721-91-5
Molecular Formula	TestP C₂₂H₃₂O₃ + TestPP C₂₈H₃₆O₃ + TestIC C₂₅H₃₆O₃ + TestD C₂₉H₄₄O₃
MW	344.5 / 420.6 / 388.6 / 456.7
Purity	≥99% by HPLC — every batch
Identity	MS confirmed — every batch
COA	Janoshik-independent, publicly verifiable
Vehicle	Pharmaceutical-grade oil (USP/BP)
Storage	Room temperature 15–25°C \| Protect from light \| 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 this QSC injectable supplied?

QSC injectable solutions are supplied ready-to-use — no reconstitution required. Each vial contains the stated concentration in pharmaceutical-grade carrier (oil or aqueous). Draw using a sterile syringe appropriate for the solution viscosity.

How should this QSC injectable be stored?

Oil-based solutions: store at room temperature (15–25°C), away from direct sunlight — do not refrigerate as cold temperatures can cause crystallisation. Aqueous solutions: store at 2–8°C. Properly stored, injectable solutions are stable for 2–3 years.

What purity is this QSC injectable and how is it verified?

All QSC injectable compounds are ≥99% pure by HPLC on every production batch, with MS-confirmed identity. 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