17α-Methyltestosterone
17α-Methyltestosterone (CAS: 58-18-4), with the molecular formula C20H30O2 and a molecular weight of 302.45 g/mol, is a synthetic androgenic and anabolic steroid. It is primarily utilised in chemical synthesis and research applications, serving as a building block for complex molecules. Its well-defined chemical properties make it a valuable reagent in organic chemistry laboratories and for studies in cell biology.
- IUPAC
- 17α-Methyl-4-androsten-17β-ol-3-one,17β-Hydroxy-17α-methyl-4-androsten-3-one,Mesterone,Methyltestosterone
- Synonyms
- 17α-Methyl-4-androsten-17β-ol-3-one17β-Hydroxy-17α-methyl-4-androsten-3-oneMesteroneMethyltestosterone

Chemical Synthesis
17α-Methyltestosterone serves as a valuable intermediate and building block in the synthesis of complex organic molecules. Its specific structure allows for targeted reactions in the development of novel compounds.
Research Reagent
This compound is employed as a reagent in various research settings, including chemical and cell biology studies. Its defined properties support precise experimental outcomes.
Asymmetric Synthesis
As a chiral building block, 17α-Methyltestosterone is utilised in asymmetric synthesis pathways. It enables the stereoselective construction of complex molecular architectures.
| Molecular weight | 302.45 |
|---|---|
| Empirical formula | C20H30O2 |
| Assay | ≥97.0% (HPLC) |
| Solubility | H2O: ≤0.5 mg/mLethanol: soluble22 mg/mL45% (w/v) aq 2-hydroxypropyl-β-cyclodextrin: soluble4.8 mg/mL |
| Optical activity | [α]20/D +82±3°, c = 1% in ethanol |
| Loss on drying | ≤2% loss on drying |
| Melting point | 162-168 °C(lit.) |

Hazard statements
- H350May cause cancer
- H361Suspected of damaging fertility or the unborn child
Precautionary statements
- P201Obtain special instructions before use
- P281Use personal protective equipment as required
- P308IF exposed or concerned
| Protective equipment | Eyeshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T |
| Risk statements (R) | 45-63 |
| Safety statements (S) | 53-36/37-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Drug Control | USDEA Schedule IIIN; regulated under CDSA - not available from Canada |
|---|---|
| Gene Information | rat ... Ar(24208) |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 17α-Methyltestosterone used for?
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17α-Methyltestosterone is used in chemical synthesis, research applications, and asymmetric synthesis. It functions as a building block for complex molecules and a reagent in cell biology studies.
What are the CAS number and formula for 17α-Methyltestosterone?
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The CAS number for 17α-Methyltestosterone is 58-18-4, and its empirical formula is C20H30O2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 17α-Methyltestosterone with a purity of ≥97.0% (HPLC). This product is not represented as USP, BP, or EP grade.
How should 17α-Methyltestosterone be handled?
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Handling 17α-Methyltestosterone requires appropriate personal protective equipment including eyeshields and gloves. A full-face particle respirator (US type N100) or suitable filter cartridges (US type N100 or EN143 type P1/P3) should be used. It is classified as a hazardous substance (GHS08) with danger signal word, and carries hazard statements H350 (May cause cancer) and H361 (Suspected of damaging fertility or the unborn child).
Is 17α-Methyltestosterone a controlled substance?
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Yes, 17α-Methyltestosterone is a controlled substance. It is listed under US DEA Schedule III and regulated under CDSA, and is not available from Canada.
How is 17α-Methyltestosterone shipped or exported?
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Tech Serve Solutions exports fine chemicals globally, adhering to all relevant shipping and regulatory requirements for controlled substances.
How can I request a sample or quote for 17α-Methyltestosterone?
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To request a sample or quote for 17α-Methyltestosterone, please contact our sales team through the website or designated contact channels.
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