Testosterone Undecanoate 300mg/mL Injectable | 20-Vial Kit
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Testosterone Undecanoate 300mg/mL — ultra-long-acting esterified testosterone, 20-vial kit. ≥99% HPLC purity, MS confirmed, Janoshik COA. Research use only.
* The information on this page is a summary and is not intended to cover all available information about this medication. It does not cover all possible uses, directions, precautions, drug interactions or adverse effects and is not a substitute for the expertise and judgement of your healthcare professional.
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What is Testosterone Undecanoate?
Testosterone Undecanoate (Ultra-long-acting esterified testosterone (injectable)) is a testosterone undecanoate ester — C₃₀H₄₈O₃, MW 456.7. Longest-chain testosterone ester providing ultra-extended release (peak ~7 days, active ~10–14 weeks in clinical use). Stored in lymphatic depot before systemic release. Free testosterone activates the androgen receptor (AR). Minimal aromatisation relative to shorter esters at equivalent free-T levels.
Research Applications
Ultra-Long-Acting Androgen Depot
Lymphatic depot storage and extended-release pharmacokinetics research
TRT Research Model
Long-interval testosterone restoration with reduced injection frequency
Androgen Receptor Biology
AR binding, nuclear translocation, androgen-responsive gene expression
HPG Axis Feedback
Prolonged suppression kinetics of the hypothalamic-pituitary-gonadal axis
Lymphatic Drug Delivery
Lymphatic absorption model for lipophilic injectable depot formulations
Quick Specs
| Form | Oil-based injectable solution |
| Concentration | 300mg/mL |
| CAS | 5949-44-0 |
| Molecular Formula | C₃₀H₄₈O₃ |
| MW | 456.7 Da |
| Purity | ≥99% by HPLC — every batch |
| Identity | MS molecular weight confirmed — every batch |
| COA | Janoshik-independent, publicly verifiable |
| Vehicle | Pharmaceutical-grade carrier oil + benzyl alcohol/benzoate |
| Storage | Room temp sealed | 2–8°C recommended |
| Shelf Life | 24 months (unopened) |
Certificate of Analysis (COA)
Frequently Asked Questions
Frequently asked questions
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Websites in professional use templating systems. Commercial publishing platforms and content management systems ensure that you can show different text, different data using the same template. When it’s about controlling hundreds of articles, product pages for web shops.
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