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 |
TestP C₂₂H₃₂O₃ + TestPP C₂₈H₃₆O₃ + TestIC C₂₅H₃₆O₃ |
| Purity |
≥99% by HPLC — every batch |
| CAS Number |
57-85-2 / 1255-49-8 / 15262-86-9 / 5721-91-5 |
| Molecular Weight |
MS confirmed — every batch |
| Specification |
≥99% by HPLC — every batch |
| Shelf Life |
24 months (unopened) |
| Storage |
Room temperature 15–25°C | Protect from light | Do not freeze |
| Brand |
China |
Frequently Asked Questions
How do I reconstitute this peptide?
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 peptide 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 compound 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.
🌍 Domestic shipping: 🇺🇸 USA 5–7 days
🌏 International shipping: 7–14 days
⚠️ RESEARCH USE ONLY — NOT FOR HUMAN CONSUMPTION
QSC products are strictly for in vitro and in vivo laboratory research.
Safety & Handling
🚫
Not for Human Use
These compounds are for research only.
🥽
PPE Required
Always use appropriate protective equipment.
❄️
Storage Compliance
Follow product-specific storage conditions.
Product-Specific Storage
Room temperature 15–25°C | Protect from light | Do not freeze
