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 |
C₂₇H₄₀O₃, MW 412.6 |
| Purity |
≥99% by HPLC — every batch |
| CAS Number |
58-20-8 |
| Molecular Weight |
MS molecular weight confirmed — every batch |
| Specification |
≥99% by HPLC — every batch |
| Shelf Life |
24 months (unopened) |
| Storage |
Room temperature sealed | cool, dry storage |
| Manufacture |
In-house synthesis — Qingdao, China |
| Brand |
China |
Certificate of Analysis (COA)
Frequently Asked Questions
How do I reconstitute this peptide?
QSC raw powder compounds are supplied as bulk crystalline or amorphous powder in a sealed, labelled container at the stated quantity. No reconstitution is required — the powder is ready for weighing and use in research applications.
How should this peptide be stored?
Store at room temperature (15–25°C) in a cool, dry place away from moisture, heat, and direct light. Keep in the original sealed container. Properly stored raw powder remains stable for 2–3 years.
What purity is this QSC compound and how is it verified?
All QSC raw powder compounds are tested to ≥99% purity 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 sealed | cool, dry storage
