QSC RESEARCH GRADE
≥99% HPLC PurityMS ConfirmedJanoshik COAIn-House SPPS2-Region Domestic Shipping
What is Testosterone Cypionate?
Testosterone Cypionate (Long-acting esterified testosterone (injectable)) is a Testosterone cypionate ester — C₂₇H₄₀O₃, MW 412.6. Esterified testosterone hydrolysed to free testosterone after intramuscular injection (peak ~1–3 days, active ~2 weeks). Free testosterone activates the androgen receptor (AR) producing anabolic effects in muscle, bone, and CNS. Aromatases to oestradiol via CYP19A1 — both AR and ERα/β signalling.
Research Applications
Androgen Receptor Biology
AR binding, nuclear translocation, androgen-responsive gene expression
TRT Research Model
Male hypogonadism, testosterone restoration, androgen deficiency
Muscle Anabolism
Protein synthesis, IGF-1 upregulation, satellite cell activation
Aromatisation Research
CYP19A1 conversion to oestradiol — oestrogenic co-effects
HPG Axis Feedback
Hypothalamic-pituitary-gonadal axis suppression and recovery
Quick Specs
| Form | Injectable solution (oil-based) |
| Purity | ≥99% by HPLC — every batch |
| CAS Number | 58-20-8 |
| Molecular Formula | C₂₇H₄₀O₃, MW 412.6 |
| Identity | MS molecular weight confirmed — every batch |
| COA | Janoshik-independent, publicly verifiable |
| Manufacture | In-house synthesis — Qingdao, China |
| Storage | Room temperature (15–25°C) | Do not refrigerate |
| Shelf Life | 24 months (unopened) |
