Testosterone Suspension 100mg/mL Injectable | 20-Vial Kit
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Testosterone Suspension 100mg/mL — unesterified aqueous testosterone, immediate-onset, 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 Suspension?
Testosterone Suspension (Unesterified aqueous testosterone suspension (injectable)) is pure testosterone — C₁₉H₂₈O₂, MW 288.4 — without any ester modification, suspended in aqueous vehicle. Unesterified testosterone has the fastest onset of any injectable testosterone form (peak ~2–4h, active ~24–48h). Directly available for immediate AR activation without ester hydrolysis step. Fully aromatises to oestradiol via CYP19A1.
Research Applications
Immediate Androgen Delivery
No ester hydrolysis required — fastest-acting injectable testosterone for acute AR activation studies
Androgen Receptor Biology
Direct unmodified testosterone AR binding and nuclear signalling
Pharmacokinetic Reference
Pure testosterone PK reference compound for ester comparison studies
Aromatisation Research
Complete CYP19A1 aromatisation — rapid oestradiol elevation studies
HPG Axis Feedback
Rapid onset suppression of hypothalamic-pituitary-gonadal axis
Quick Specs
| Form | Aqueous suspension (unesterified) |
| Concentration | 100mg/mL |
| CAS | 58-22-0 |
| Molecular Formula | C₁₉H₂₈O₂ |
| MW | 288.4 Da |
| Purity | ≥99% by HPLC — every batch |
| Identity | MS molecular weight confirmed — every batch |
| COA | Janoshik-independent, publicly verifiable |
| Vehicle | Aqueous vehicle — shake well before use |
| Aromatisation | Full — converts to oestradiol via CYP19A1 |
| Storage | 2–8°C | Do not freeze |
| 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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