What is Testosterone Propionate?
Testosterone Propionate (Short-acting esterified testosterone (injectable)) is a testosterone propionate ester — C₂₂H₃₂O₃, MW 344.5. The 200mg/mL high-concentration formulation provides a higher dose per mL injection volume. Rapid-onset ester with peak ~24–36h and active window ~2–3 days. Free testosterone activates the androgen receptor (AR). Aromatases to oestradiol via CYP19A1.
Research Applications
High-Concentration Short-Acting Androgen
200mg/mL format reduces injection volume for equivalent dose research protocols
Androgen Receptor Biology
AR binding, nuclear translocation, androgen-responsive gene expression
Pharmacokinetic Research
Short half-life enables precise peak-and-trough testosterone studies
Aromatisation Research
CYP19A1 conversion to oestradiol — oestrogenic co-effects
HPG Axis Research
Rapid suppression/recovery kinetics of the hypothalamic-pituitary-gonadal axis
Quick Specs
| Form |
C₂₂H₃₂O₃ |
| Purity |
≥99% by HPLC — every batch |
| CAS Number |
57-85-2 |
| Molecular Weight |
MS molecular weight confirmed — every batch |
| Specification |
≥99% by HPLC — every batch |
| Shelf Life |
24 months (unopened) |
| Storage |
Room temp sealed | 2–8°C recommended |
| Brand |
China |
Frequently Asked Questions
How do I reconstitute this peptide?
QSC Testosterone esters are supplied as ready-to-use oil-based injectable solutions — no reconstitution required. Each vial contains the stated concentration in pharmaceutical-grade carrier oil. Warm the vial briefly in your hand before drawing.
How should this peptide be stored?
Store at room temperature (15–25°C), away from direct sunlight. Oil-based testosterone solutions are stable for 2–3 years properly stored. Do not refrigerate as this can cause crystallisation of the ester in the oil.
What purity is this QSC compound and how is it verified?
QSC Testosterone injectable solutions are ≥99% HPLC pure with MS-confirmed identity on every batch. 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 temp sealed | 2–8°C recommended
