What is Sustanon (Testosterone Propionate 30mg + Testosterone Phenylpropionate 60mg + Testosterone Isocaproate 60mg + Testosterone Decanoate 100mg)?
Sustanon 250 is a four-ester testosterone preparation delivering 250mg/mL total testosterone via four distinct release phases: Testosterone Propionate 30mg (rapid onset, ~1–2 days), Testosterone Phenylpropionate 60mg (short-medium, ~3–5 days), Testosterone Isocaproate 60mg (medium, ~7–9 days), and Testosterone Decanoate 100mg (long-acting, ~14–16 days). The original multi-ester testosterone formulation used as a pharmacokinetic reference in androgen research. Research use only.
Research Applications
Multi-Ester Testosterone Pharmacokinetics
Four-phase serum testosterone profiling — Cmax, half-life and AUC per ester component
HPG Axis Suppression Models
LH/FSH suppression dynamics, GnRH pulse frequency reduction, negative feedback
Testosterone Replacement Research
Physiological vs supraphysiological androgen repletion kinetics, SHBG modulation
Aromatisation Studies
Estradiol conversion rate, aromatase enzyme activity, estrogen receptor interaction
Comparative Ester Research
Propionate vs phenylpropionate vs isocaproate vs decanoate — relative hydrolysis rates
Quick Specs
| Form | Injectable solution |
| Concentration | 250mg/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) — Arachis oil / Benzyl benzoate / Benzyl alcohol |
| Storage | Room temperature 15–25°C | Protect from light | Do not freeze |
| Shelf Life | 24 months (unopened) |
