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 | Raw bulk powder (crystalline/amorphous) |
| Purity | ≥99% by HPLC — every batch |
| CAS Number | 1255-49-8 |
| Molecular Formula | C₂₈H₃₆O₃, MW 420.6 |
| Identity | MS molecular weight confirmed — every batch |
| Compound Type | Short-Medium Ester Testosterone (Phenylpropionate) |
| 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
