The short version of LC-MS/MS fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-02-19. Anything still debated is marked as such rather than presented as settled.
Research interest in SR9009 grew from studies showing improved running endurance in mice after short treatment periods. Those experiments linked the compound to increased mitochondrial content and fatty acid oxidation in muscle, but the findings come from animal models and specific dosing schedules. Independent replication has been limited, and the pathways connecting REV-ERB activation to exercise performance are still being mapped. Whether similar responses occur in humans is an open question.
SR9009 is often grouped with compounds studied for circadian and metabolic regulation rather than with classical anabolic steroids. Its interactions with nuclear receptors differ from those of androgen receptor ligands, and its proposed mechanisms involve transcriptional control rather than direct hormone signaling. Some sources classify it as a metabolic modulator because of observed effects on energy utilization. The distinction matters for regulation and for interpreting research results across different compound classes.
SR9009 is a synthetic small molecule developed as a REV-ERB agonist. It binds to REV-ERBα and REV-ERBβ, nuclear receptors that help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, the compound alters lipid and glucose handling and influences skeletal muscle oxidative capacity. Its exact effects in humans remain largely uncharacterized because controlled clinical trials have not been reported. The molecule is frequently described in preclinical literature as a metabolic modulator.
Quality control for research materials includes identity confirmation by nuclear magnetic resonance and purity assessment by high-performance liquid chromatography. Mass spectrometry provides molecular weight confirmation and can detect related impurities. Purchasers should request a certificate of analysis that lists lot-specific data. Online products advertised for human use often lack such documentation. Distinguishing legitimate research material from mislabeled or contaminated samples is a recurring challenge in independent testing, and independent laboratories may use orthogonal methods to verify identity.
Detection of SR9009 in biological samples usually relies on liquid chromatography coupled to tandem mass spectrometry. This approach separates the compound from matrix components and identifies it by mass transitions. Because SR9009 can undergo metabolism, laboratories often look for both parent drug and specific metabolites. Sample preparation may involve protein precipitation or solid-phase extraction. Method validation examines sensitivity, carryover, and interference from related substances, and reference standards are required for accurate calibration.
Storage recommendations for SR9009 reference material typically specify a freezer at -20 °C or lower, with protection from moisture and light. Repeated freeze-thaw cycles can degrade small molecules and introduce variability. Stock solutions in dimethyl sulfoxide are often aliquoted to avoid repeated handling. Stability studies may examine degradation under heat, humidity, and light exposure. The compound's thiophene and nitro groups can participate in reactions that alter analytical signals over time, so such changes affect quantitative results.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C20H24ClN3O4S | Reported for the free base |
| Molecular weight | 437.9 g/mol | Calculated from the formula |
| Primary target | REV-ERBα and REV-ERBβ | Nuclear receptors involved in circadian regulation |
| Solubility | Soluble in DMSO and ethanol | Poorly soluble in water |
| Typical storage | -20 °C, desiccated | Protect from light and moisture |
Storage conditions for research-grade SR9009 generally involve a freezer at approximately minus twenty degrees Celsius, sometimes lower for long-term preservation. Containers should remain tightly closed and protected from light. Desiccants may be used to limit moisture uptake. Solutions are often stored in aliquots to avoid repeated warming and cooling. Stability data for the compound under various conditions are limited, so laboratories typically follow supplier recommendations and verify performance through periodic analytical checks rather than assuming indefinite stability.
Identity and purity testing for SR9009 commonly uses liquid chromatography coupled with tandem mass spectrometry. This method separates the compound from matrix components and detects it by mass-to-charge transitions, providing sensitive and specific confirmation. Nuclear magnetic resonance spectroscopy can support structural identification, while high-performance liquid chromatography with ultraviolet detection may estimate purity. Because online products labeled as SR9009 may contain other substances or no active compound at all, independent verification is important in research settings. Certificates of analysis are useful but not a substitute for in-house testing.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. These receptors help regulate circadian rhythms and metabolic gene expression. In laboratory experiments, SR9009 binds these receptors and alters transcription of genes involved in lipid handling, glucose metabolism, and mitochondrial function. It is not a naturally occurring compound and has no approved therapeutic use. Research interest stems from its ability to modify energy metabolism in cells and animal models.
In rodent studies, SR9009 has been reported to increase mitochondrial content in skeletal muscle and improve exercise endurance under some conditions. These findings led to popular descriptions such as an exercise mimetic, although that term oversimplifies the biology. Effects vary by dose, timing, tissue, and model. The compound's influence on circadian pathways means that time of administration can matter in experiments. Whether similar metabolic changes occur in humans remains largely unexplored in controlled published trials.
SR9009 is supplied as a solid research chemical, often in milligram quantities. Laboratories typically weigh it in a controlled environment because fine powders can disperse. Stock solutions are commonly prepared in dimethyl sulfoxide and stored in small aliquots to reduce freeze-thaw cycles. Personal protective equipment and chemical fume hoods are standard when handling unknown or potent compounds. These practices address laboratory safety rather than human use.
Identity and purity of SR9009 samples are usually checked with chromatographic and spectrometric methods. High-performance liquid chromatography can separate the compound from related impurities, while mass spectrometry provides molecular mass confirmation. Nuclear magnetic resonance spectroscopy may be used for structural verification in research settings. No single method proves biological activity, and certificates of analysis should be reviewed alongside raw data. Independent testing is often needed because online products vary widely.
SR9009 stability depends on temperature, moisture, light, and solvent. Solid material is generally kept cool and dry, while solutions may require protection from repeated warming and cooling. Degradation can appear as color changes, precipitate, or new chromatographic peaks. Researchers should follow supplier instructions and their own stability data. Long-term storage conditions for human use have not been established because the compound lacks approved clinical formulation.
MLTs receive training more exclusively in laboratory sciences without the basic science coursework often required by MLS programs; however, there are many MLT training programs that require substantial basic didactic science course work prior to entry into a clinical practicum. Although the didactic coursework may be less for the MLT, the clinical practicum, in many cases, is similar to that of the MLS student's. This equates to MLTs who are well equipped to enter the work force with relevant and knowledge based practical application. The shorter training time may be attractive to many students, but there are disadvantages to this route. MTs, MLSs and CLSs usually earn higher salaries and have more responsibilities than MLTs. In 2018, medical laboratory technicians earned an average salary of $51,219, while medical laboratory scientists earned a salary of $67,888. An added disadvantage for MLTs is that some institutions will only employ MLSs, although that practice is starting to change due to recent efforts in cost reduction, and due to staffing shortages. In practice, the term medical laboratory technician may apply to persons who are trained to operate equipment and perform tests, usually under the supervision of the certified medical technologist or laboratory scientist. Depending on the state where employment is granted, the job duties between MLSs and MLTs may or may not be similar.
=== Occlusion and hydration === Silicone gel sheets occlude and hydrate the stratum corneum of the treated skin area. The stratum corneum normally conserves water and acts as a barrier to microbial infection. Its function can be disrupted by wound formation. The stratum corneum of hypertrophic scars and keloids absorbs more water than normal skin, depleting the water supply from the stratum corneum. Excessive dehydration of keratinocytes stimulates cytokine production, leading to increased collagen production. After applying the sheet, the rate of water loss via evaporation of the treated skin area is half of the untreated area. Therefore, the sheet prevents the drying up of stratum corneum, and thus further collagen production. Collagen production exacerbates the growth of hypertrophic scars and keloids and thus should be avoided. Hydrating a scar over a prolonged period can also relieve symptoms such as itching and pain. Such an effect is likely due to decreased capillary activity and thus local collagen deposition.
Oxycodone was allegedly chosen over other common opiates for this product because it had been shown to produce less sedation at equianalgesic doses compared to morphine, hydromorphone (Dilaudid), and hydrocodone (Dicodid). During Operation Himmler, Skophedal was also reportedly injected in massive overdose into the prisoners dressed in Polish Army uniforms in the staged incident on 1 September 1939 which opened the Second World War. The personal notes of Adolf Hitler's physician, Theodor Morell, indicate Hitler received repeated injections of "Eukodal" (oxycodone; produced by Merck) and Scophedal, as well as Dolantin (pethidine), codeine, and morphine less frequently; oxycodone could not be obtained after late January 1945. In the United States, the Controlled Substances Act (CSA) was passed by the United States Congress and signed into law by President Richard Nixon on 27 October 1970. The passing of the CSA resulted in all products containing oxycodone being classified as a Schedule II controlled substance. In the early 1990s, Purdue Pharma, a privately held company based in Stamford, Connecticut, developed a controlled-release version of oxycodone: the prescription painkiller OxyContin ("contin" being short for "continuous", reflecting a longer duration of pain relief). It was approved by the FDA in 1995 after no long-term studies and no assessment of its addictive capabilities. David Kessler, the FDA commissioner at the time, later said of the approval of OxyContin: "No doubt it was a mistake.
=== Paleomagnetic dating === A sequence of paleomagnetic poles (usually called virtual geomagnetic poles), which are already well defined in age, constitutes an apparent polar wander path (APWP). Such a path is constructed for a large continental block. APWPs for different continents can be used as a reference for newly obtained poles for the rocks with unknown age. For paleomagnetic dating, it is suggested to use the APWP in order to date a pole obtained from rocks or sediments of unknown age by linking the paleopole to the nearest point on the APWP. Two methods of paleomagnetic dating have been suggested: (1) the angular method and (2) the rotation method. The first method is used for paleomagnetic dating of rocks inside of the same continental block. The second method is used for the folded areas where tectonic rotations are possible.
=== Analysis === Northeastern University School of Law professor Alexandra Roberts argued that Twitter's claim that certain individuals paid for Twitter Blue may violate state and federal false representation laws, such as the Lanham Act, popularized through a retweet by dril, but reserved that Twitter was not making a direct advertisement. Solicitor Simon McGarr mentioned that Twitter's insistence on the blue checkmark for some users, such as dril, may violate the General Data Protection Regulation (GDPR) in the European Union, as verifying accounts requires a phone number. McGarr also noted Tolley v. Fry, a 1931 court case filed against chocolate bar manufacturer J. S. Fry & Sons by golfer Cyril Tolley alleging that the advertising of chocolate bars with a caricature of Tolley was defamatory, or the similar case Eddie Irvine v. Talksport between racing driver Eddie Irvine and sports radio station Talksport. Other scholars have cited the Federal Trade Commission Act of 1914, while some have pointed to the disdain for blue checkmarks and the potential effects of the checkmark on celebrities' reputations. The Federal Trade Commission (FTC) has not commented on Twitter Blue, although an anonymous former FTC official called it "deceptive". Following the initial implementation of paid verification, the Twitter account for the anti-vaccine propaganda film Died Suddenly (2022) became verified. The account has been used to spread medical misinformation, including of COVID-19 vaccines.
Sources: en.wikipedia.org
Despite this, there continues to be intensive research and industry interest in second-generation biomass conversion processes due to its potential to re-use potentially valuable products and derivative products that would otherwise be wasted by incineration.
The nitride anion (N3−) is the strongest π donor known among ligands (the second-strongest is O2−). Nitrido complexes are generally made by the thermal decomposition of azides or by deprotonating ammonia, and they usually involve a terminal {≡N}3− group. The linear azide anion (N−3), being isoelectronic with nitrous oxide, carbon dioxide, and cyanate, forms many coordination complexes. Further catenation is rare, although N4−4 (isoelectronic with carbonate and nitrate) is known.
Condom Cestino was elected Grand Master, and Jose Alvarez Rivera Maldonado was elected Grand Secretary. In 1965, the Grand Lodge of Massachusetts took over the dispensation of the Caribbean Naval Lodge, which is the Masonic Naval Lodge at Guantanamo Bay Naval Base. Into the year 1967, the Masonic Service Association of the United States publication Foreign Grand Lodges Recognized By the Forty-nine Grand Lodges of the United States stated that 38 Grand Lodges in the United States were still in regular "fraternal communication" with the Grand Lodge of Cuba at Havana. From 1967 to 2007, no new Lodges were created in Cuba. In 1970, the street in front of the National Temple was officially renamed after Salvador Allende, who was not only a good friend of Fidel Castro, but also a prominent Freemason himself.
Southern Ohio Medical Center (or SOMC) is a 216-bed 501(C)(3) not-for-profit hospital in Portsmouth, Ohio. It provides emergency and surgical care, as well as other health care services. SOMC employs 2,600 full-time employees and part-time employees, has a medical staff of more than 140 physicians and specialists, and is supported by approximately 800 volunteers. In 2020, Fortune magazine ranked Southern Ohio Medical Center at number 22 of their Fortune List of the Top 100 Companies to Work For based on an employee survey of satisfaction.
Sources: en.wikipedia.org
=== Claude D. Pepper Older Americans Independence Center === The San Antonio Claude D. Pepper Older Americans Independence Center (OAIC) is one of only fifteen National Institute on Aging (NIA)-funded Pepper Centers in the United States. Established in 2015, the Center serves as the translational arm of the Barshop Institute's aging research enterprise, with the overarching goal of improving the health, physical function, and independence of older adults. In partnership with the South Texas Veterans Health Care System Geriatric Research, Education and Clinical Center (GRECC), the Center brings together basic scientists, clinician investigators, epidemiologists, and population scientists to translate discoveries in the biology of aging into interventions that preserve functional independence and improve quality of life. The San Antonio Pepper Center is nationally recognized as the first Claude D. Pepper Center organized around the principles of geroscience—the concept that aging itself is the primary biological risk factor underlying most chronic diseases and functional decline. Rather than studying age-related diseases in isolation, investigators focus on the fundamental mechanisms of aging that contribute to conditions such as frailty, sarcopenia, mobility impairment, cardiovascular disease, type 2 diabetes, Alzheimer's disease and related dementias, and other chronic disorders affecting older adults.
This can lead to excessive insulin levels in the blood (hyperinsulinemia), which can be responsible for multiple symptoms. Definitive genotype–phenotype correlation for insulin receptor defects is difficult to establish primarily due to the rarity of these syndromes. However, researchers believe more severe phenotype changes are due to a mutation in the alpha subunit of the receptor.
== Variants == The M242 is currently in use by the United States Army, the United States Navy, the United States Marine Corps, the United States Coast Guard, the New Zealand Army, the Royal New Zealand Navy, the Norwegian Army, the Spanish Army, the Sri Lanka Navy, the Swiss Army, the Canadian Army, the Royal Canadian Navy, the Australian Army, the Royal Australian Navy, the Israeli Navy, the Philippine Navy, the Philippine Army, the Singapore Army, and the Republic of Singapore Navy as well as several others, including since 2023 the Armed Forces of Ukraine. The wide usage has resulted in several variations and modifications on the standard M242 weapon system.
Sources: en.wikipedia.org
It is a synthetic REV-ERB agonist used mainly in preclinical research. It is not an approved medicine for human use.
It binds to REV-ERBα and REV-ERBβ, nuclear receptors involved in circadian and metabolic gene regulation. This can alter transcription of genes related to lipid and glucose metabolism in experimental models.
No controlled human trials have established that effect. Endurance findings come primarily from rodent studies, and human responses remain unknown.
Liquid chromatography-tandem mass spectrometry is a common approach. It can detect the parent compound and its metabolites in biological matrices.