1
Maintained levator ani muscle mass at physiological levels in castrated rats at doses of 0.1-0.3 mg/day.
View on PubMed →
S23 Solution
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S23 is a potent non-steroidal selective androgen receptor modulator (SARM) with high binding affinity to the androgen receptor (Ki = 1.7 nM). In preclinical studies, S23 maintained muscle mass at physiological levels in castrated models and has been investigated for its effects on body composition.
Every batch is independently tested by a 3rd party laboratory. Certificate of Analysis available below.
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United KingdomRoyal Mail tracked, no customs
Buying in the UK: fast, secure domestic delivery
This S23 solution is held in stock in our UK warehouse and travels by Royal Mail tracked: a short domestic journey, with no customs involved. Prices are shown in GBP with UK VAT included, so the price on this page is the price paid. UK payments: card and bank transfer (see how to pay).
United StatesTracked, 100% delivery rate
Buying in the USA: shipped from the UK, priced in USD
Orders from the United States ship from the same UK warehouse with tracked international delivery and a 100% delivery rate: we have never had a parcel held at US customs. You pay in USD, by card, crypto or bank transfer, and every bottle comes from the same independently tested batch as the UK orders.
Switzerland and rest of world100% guaranteed delivery
Buying from Switzerland and the rest of the world
Every international parcel is prepared with care to clear customs smoothly, and the vast majority arrive without any delay. If a delivery ever goes wrong, we reship your order or refund it: you are never left without your parcel or your money.
Ordering from inside the European Union? The same product is stocked in our EU warehouse with no customs: see the S23 EU page.
Worldwide ShippingUK · EU · USA · Asia
3rd Party TestedIndependent lab CoA
≥96% HPLC PurityVerified per batch
Safe DeliveryDiscreet packaging
Research Overview
About this compound
What does the research say?
S23 binds to the androgen receptor with a Ki of 1.7 nM and demonstrates strong anabolic activity in preclinical models. In castrated male rats, S23 treatment maintained levator ani muscle mass at physiological levels at doses between 0.1 and 0.3 mg/day, indicating potent anabolic effects.
S23 has also been investigated as a potential hormonal male contraceptive. In intact male rats, S23 combined with estradiol benzoate produced a reversible reduction in sperm concentration while maintaining sexual behaviour, an area of active research interest.
These are not marketing claims. These are peer-reviewed, published results. You can verify every reference below.
Why does quality matter with S23?
S23 is one of the more potent SARMs, and its high activity makes accurate dosing critical. Underdosed or impure products can produce unpredictable results. Without independent lab testing, purity and concentration cannot be verified.
At Camo Chem, every batch is tested by an independent 3rd party laboratory. We publish the full Certificate of Analysis for every batch, and you can verify the results directly with the lab. We do not self-certify. Ever.
Ask your current supplier: who tests their products?
Technical Data
Compound specifications
| Common Names | S-23, S23 |
| CAS Number | 1010396-29-8 |
| Molecular Formula | C₁₈H₁₃ClF₄N₂O₃ |
| Molecular Weight | 416.76 g/mol |
| Classification | Non-steroidal SARM |
| Purity | ≥96% (HPLC verified) |
| Form & Concentration | Solution in PEG-400/DMSO, 25mg/ml, 30ml bottle |
| Ingredients | PEG-400, DMSO, S23 |
| Storage | Cool, dry place. Keep sealed. Avoid direct sunlight. |
Peer-reviewed Studies
Published research on S23
2
Reversible reduction in sperm concentration while maintaining sexual behaviour in preclinical models.
View on PubMed →3
High androgen receptor binding affinity (Ki = 1.7 nM) with tissue-selective anabolic activity.
View on PubMed →
Customer Reviews
What researchers are saying
5.0
2 reviews
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★★★★★
Definitely feeling younger in my old age
★★★★★
Very very powerful darn, be careful and follow the guidelines
FAQ
Frequently asked questions
S23 is a non-steroidal selective androgen receptor modulator (SARM) with CAS number 1010396-29-8. It has high androgen receptor binding affinity (Ki = 1.7 nM) and is one of the more potent SARMs studied. It is sold exclusively as a research compound.
Every batch meets a minimum of 96% purity as verified by HPLC. Testing is performed by an independent 3rd party laboratory. The CoA is available on this page.
By an independent laboratory with no commercial relationship with our company. We do not self-certify. Our CoAs are verifiable directly with the testing lab.
Store in a cool, dry place away from direct sunlight. Keep the bottle tightly sealed.
Yes. Every batch is independently tested and the CoA is linked on this page. Results can be verified directly with the laboratory.
