What is Testosterone Phenylpropionate?
Testosterone Phenylpropionate (TestPP) is a phenyl-esterified testosterone with intermediate duration (~4–5 days). Second component of Sustanon blends. The phenyl group slows hydrolysis vs simple propionate, creating a mid-range release profile. Research use only.
Research Applications
Mid-Range Ester PK
Phenylpropionate hydrolysis dynamics — faster than enanthate, slower than propionate
Sustanon Component Research
Isolated TestPP contribution to multi-ester Sustanon serum profile
Phenyl Ester Pharmacology
Phenyl group effect on esterase substrate specificity, release kinetics
Androgen Receptor Research
Testosterone AR activation after phenylpropionate ester hydrolysis
Multi-Ester Formulation
TestPP as mid-acting component in blended testosterone preparations
Quick Specs
| Form |
C₂₈H₃₆O₃, MW 420.6 |
| Purity |
≥99% by HPLC — every batch |
| CAS Number |
1255-49-8 |
| 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
