305 In the index

S-23 S-23

A strong experimental muscle-building compound studied in animals for both building muscle and, interestingly, as a possible male birth control option because it can shut down sperm production. It has never been tested in humans, so its potential and its risks are known only from animal studies.

Also known as S23, RefChem:1049962, CCTH-methylpropionamide, S 23, (+)-S-23, 3b5r, C-31, SARM-S23

Effects Build muscle

Routes Oral

Legal status Research chemical

WADA Banned at all times

3D Molecular Structure of C₁₈H₁₃ClF₄N₂O₃

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Chemistry

Formula: C18H13ClF4N2O3
Molar mass: 416.8
CAS: 1010396-29-8
PubChem CID: 24892822
IUPAC name: (2S)-3-(4-chloro-3-fluorophenoxy)-N-[4-cyano-3-(trifluoromethyl)phenyl]-2-hydroxy-2-methylpropanamide
InChIKey: SSFVOEAXHZGTRJ-KRWDZBQOSA-N

Reported dosing

User-reported

What has been reported in the literature and by users. This is a record of what is done, not a recommendation.

Typical dose 10-20 mg/day

Reported range 10-30 mg/day

Route Oral

Frequency Once daily

Duration 6-8 week cycles (unregulated use)

A SARM also studied as a non-hormonal male contraceptive candidate in animals; never completed human clinical development for either use. Sold only as a research chemical, and known to be strongly suppressive of natural testosterone.

Where this comes from Animal studies; user-reported/research-chemical vendor literature

There is no approved human dosing for this compound. The figures above are what users and vendors report, not what has been established as safe or effective. Treat them as a record of what is done, not as guidance.