What is Methenolone Enanthate?
Primobolan Depot (Methenolone Enanthate — long-acting injectable anabolic-androgenic steroid) is the enanthate ester of methenolone — C₂₇H₄₂O₃, MW 414.6. The injectable form of Primobolan provides longer active duration (peak ~3–5 days, active ~10–14 days) vs the oral acetate form. Notably mild androgenic profile with high anabolic-to-androgenic ratio. Does not aromatise to oestrogen. Low progestogenic activity.
Research Applications
Mild-Anabolic Injectable Research
Long-acting methenolone with low androgenic profile — anabolic with minimal androgenic side-effect research
Non-Aromatising Injectable AAS
Anabolic research without oestrogen confounds — injectable alternative to oral Primobolan
Androgen Receptor Binding Studies
Moderate AR affinity — characterised anabolic-to-androgenic binding ratio research
Lean Mass Preservation
Muscle preservation in catabolic models without androgenic or oestrogen co-effects
Depot Pharmacokinetics
Long-acting enanthate depot release kinetics for methenolone
Quick Specs
| Form | Oil-based injectable solution |
| Concentration | 100mg/mL |
| CAS | 303-42-4 |
| Molecular Formula | C₂₇H₄₂O₃ |
| MW | 414.6 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 | None — does not convert to oestrogen |
| Storage | Room temp sealed | 2–8°C recommended |
| Shelf Life | 24 months (unopened) |
