What is Testosterone Cypionate?
Testosterone Cypionate is a long-acting cyclopentylpropionate ester of testosterone with slightly longer duration than enanthate (~8–12 days). Pharmacokinetically similar to enanthate; used for comparative ester studies and as the dominant TRT reference compound. Research use only.
Research Applications
Cypionate vs Enanthate PK
Side-by-side comparison of slightly different ester half-lives and release curves
TRT Research Models
Standard USA TRT ester — physiological testosterone repletion research
HPG Axis Research
Long-acting suppression kinetics, LH/FSH, recovery on cessation
Aromatisation
Testosterone cypionate aromatase substrate kinetics, estradiol dynamics
SHBG Interaction
Long-exposure SHBG suppression, free testosterone fraction over time
Quick Specs
| Form | Raw bulk powder (crystalline/amorphous) |
| Purity | ≥99% by HPLC — every batch |
| CAS Number | 58-20-8 |
| Molecular Formula | C₂₇H₄₀O₃, MW 412.6 |
| Identity | MS molecular weight confirmed — every batch |
| Compound Type | Long-Ester Testosterone (Cypionate) |
| COA | Janoshik-independent, publicly verifiable |
| Manufacture | In-house synthesis — Qingdao, China |
| Storage | Room temperature sealed | cool, dry storage |
| Shelf Life | 24 months (unopened) |
Certificate of Analysis (COA)
Frequently Asked Questions
🧪 Peptide Research Tools: Use QSC’s free peptide calculators — reconstitution, BAC water, dosing, half-life, and mixing charts.
🌏 International shipping: 7–14 days
