certificate of analysis is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Last reviewed on 2025-12-01. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
Pharmacokinetic data for SR9009 are limited in published literature. Some reports indicate low oral bioavailability and rapid clearance in animals, which complicates interpretation of exposure and effect. Researchers often use injected routes in preclinical work to achieve measurable systemic levels. Analytical studies rely on mass spectrometry to detect the parent compound and its metabolites. Questions about tissue distribution, active metabolites, and long-term consequences remain open. Species differences in metabolism can affect observed half-life and target engagement.
SR9009 is frequently discussed in fitness and research-chemical contexts, yet it has no approved medical indication. Regulatory agencies have not authorized it for human use, and it is not a standard prescription drug. Some sports organizations list it as a prohibited substance because of its potential performance-enhancing properties. Published human data are sparse, so claims about its effects in people often rely on animal models or anecdotal reports. Quality and identity of online materials can vary widely.
SR9009 is a synthetic small molecule studied as a REV-ERB agonist. REV-ERBα and REV-ERBβ are nuclear receptors that help regulate circadian rhythms and metabolic gene expression. The compound was identified in academic screening efforts to find synthetic ligands for these receptors. In cell and animal studies, SR9009 alters transcription of genes involved in lipid and glucose metabolism, and it can shift circadian behavior. It is not an approved therapeutic agent.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic small-molecule REV-ERB agonist | Not a hormone or natural product |
| Primary targets | REV-ERBα and REV-ERBβ | Nuclear receptors involved in circadian and metabolic regulation |
| Appearance | White to off-white solid | Typical for purified research samples |
| Solubility | Soluble in DMSO and ethanol; low water solubility | Laboratory solubility depends on solvent and purity |
| Common synonyms | SR9009; Stenabolic | Stenabolic is a colloquial name, not a formal chemical name |
Preclinical reports have linked SR9009 to improved endurance and altered energy expenditure in rodents. Such findings have prompted interest in whether REV-ERB activation can influence skeletal muscle metabolism. However, the reported effects depend on dose, route, and experimental model, and replication across laboratories is limited. Human trials have not established comparable outcomes, so claims about exercise performance remain speculative. The absence of controlled human data is a central limitation in interpreting these observations.
The mechanism of action involves binding to REV-ERB receptors and recruiting corepressor complexes, which represses target gene transcription. This contrasts with many nuclear receptor agonists that activate transcription. Downstream effects may include changes in autophagy, mitochondrial biogenesis, and lipid handling, but the precise pathways remain an active area of study. Whether these molecular events translate into meaningful physiological effects in humans is unresolved. Most evidence comes from cultured cells and rodent models rather than human participants.
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.
Stability depends on physical form, temperature, light exposure, and solvent. Solid SR9009 is generally stored cold and dry, with protection from light to limit degradation. Dimethyl sulfoxide stocks are common for laboratory work, but repeated freeze-thaw cycles can reduce compound integrity. Aqueous solutions may be less stable than organic stocks, and the ethyl ester in the structure can be susceptible to hydrolysis under certain conditions. Researchers typically validate storage conditions and recheck purity before quantitative experiments, especially when using archived material.
Regulatory treatment of SR9009 varies by country and region. It is not approved as a pharmaceutical, and several jurisdictions restrict its sale for human consumption. Some authorities classify it as a research chemical, a prescription-only substance, or a prohibited performance-enhancing agent in sport. Purchasers may encounter certificates of analysis, but these documents do not guarantee identity, purity, or legality. In research settings, institutional safety reviews and controlled procurement help ensure that materials are handled under appropriate oversight. The absence of harmonized rules means that legal status can change and requires verification.
Analytical identification of SR9009 typically relies on liquid chromatography coupled with tandem mass spectrometry. In biological samples, researchers first separate the compound from matrix components using protein precipitation, liquid-liquid extraction, or solid-phase extraction. High-performance liquid chromatography with ultraviolet detection and nuclear magnetic resonance spectroscopy can support structural confirmation of reference materials. Because SR9009 is a small, relatively lipophilic molecule, reverse-phase columns and acidic mobile phases are common. Laboratories often include isotope-labeled internal standards to improve quantification and to correct for ion suppression.
=== Income generation === Cyber attacks, including ransomware, can be used to generate income. States can use these techniques to generate significant sources of income, which can evade sanctions and perhaps while simultaneously harming adversaries (depending on targets). This tactic was observed in August 2019 when it was revealed North Korea had generated $2 billion to fund its weapons program, avoiding the blanket of sanctions levied by the United States, United Nations and the European Union.
== Other Branded Generics == Biqi is the brand name for its generic OTC anti-diarrhea pharmaceutical. The Company obtained approval to manufacture and sell Biqi in November 1999. Zaiqi is the brand name for the company's azithromycin granules antibiotics for the treatment of infections. Zaike is the brand name for its cefaclor in dry suspension antibiotics for the treatment of infections. Simcere Kechuanning is the brand name for Simcere Pharmaceutical's OTC herbal medicine used for the treatment of coughs. It comes in oral liquid and tablet formulations. Zaikang is the brand name for its OTC compound zinc gluconate and ibuprofen granules for the treatment of cold symptoms, such as fever, nasal congestion, running nose and sneezing. Faneng is the brand name for the company's alfacalcidol soft capsules for the treatment of osteoporosis.
== 2009 settlement for off-label uses promotions == On September 2, 2009, the United States Department of Justice fined Pfizer $2.3 billion after one of its subsidiaries, Pharmacia & Upjohn Company, pleaded guilty to marketing four drugs, including Bextra, "with the intent to defraud or mislead." Pharmacia & Upjohn admitted to criminal conduct in the promotion of Bextra, and agreed to pay the largest criminal fine ever imposed in the United States for any matter, $1.195 billion. A former Pfizer district sales manager was indicted and sentenced to home confinement for destroying documents regarding the illegal promotion of Bextra. In addition, a regional manager pleaded guilty to distribution of a misbranded product, and was fined $75,000 and 24 months on probation. The remaining $1 billion of the fine were paid to resolve allegations under the civil False Claims Act case and is the largest civil fraud settlement against a pharmaceutical company. Six whistleblowers were awarded more than $102 million for their role in the investigation. Former Pfizer sales representative John Kopchinski acted as a qui tam relator and filed a complaint in 2004 outlining the illegal conduct in the marketing of Bextra. Kopchinski was awarded $51.5 million for his role in the case because the improper marketing of Bextra was the largest piece of the settlement at $1.8 billion.
Narrated by actress Miranda Richardson 27 November Dismantling the Bomb, Pantex in Texas; START II in January 1993; Ted Taylor (physicist); eighteen scientists from the UK worked on the Manhattan Project; the plutonium fissile material, which was half the world's supply, for the July Trinity (nuclear test) was carried on the back seat of a car, to be assembled; the bomb was hoisted on 14 July 1945; a warning flare was fired, then the electrical circuits were connected at 5.29am on 16 July 1945; the bomb was dropped twenty one days later, exploding at 1,900 feet; the Russians developed the bomb through the work of Igor Kurchatov and Yulii Khariton; much American nuclear weapon research also took place at Livermore, California; the first British nuclear test, on 3 October 1952, was set up by two people on HMS Plym; many US weapon cores had been made at the Rocky Flats Plant in Colorado; Viktor Mikhailov (politician), Russian minister of nuclear power; the Nuclear Control Institute. Narrated by Scottish actor Tom Cotcher, produced by Chris Haws, directed by Richard Melman, made by InCA Productions 4 December Electric Skies, about lightning at the Langmuir Laboratory for Atmospheric Research; electrical engineer Martin A.
An alkane has only C–H and C–C single bonds. The former result from the overlap of an sp3 orbital of carbon with the 1s orbital of a hydrogen; the latter by the overlap of two sp3 orbitals on adjacent carbon atoms. The bond lengths amount to 1.09 × 10−10 m for a C–H bond and 1.54 × 10−10 m for a C–C bond. The spatial arrangement of the bonds is similar to that of the four sp3 orbitals—they are tetrahedrally arranged, with an angle of 109.47° between them. Structural formulae that represent the bonds as being at right angles to one another, while both common and useful, do not accurately depict the geometry.
Sources: en.wikipedia.org
Tiflorex (TFX), formerly known as flutiorex, is a stimulant amphetamine that was under development as an appetite suppressant in the 1970s, but appears to have been abandoned. It is structurally related to fenfluramine and 4-MTA. Tiflorex went to phase II clinical trials. The extended release formulation "TFX-SR" produced significant suppression of appetite. It also caused slightly more sleep disturbances and headaches than placebo, as well as mydriasis and a self-reported decrease in arousal. It had little effect on heart rate. Tifluorex is claimed to be a more potent anorectic than fenfluramine, with twice its potency in humans and 4 times its potency in rats.
30 August – The Electoral Commission submitted its Constituency Review Report 2023 to the Oireachtas. It recommended that the number of Teachtaí Dála be increased from 160 to 174, and that the number of Dáil constituencies be increased from 39 to 43. The increases take account of a population rise of 8% since 2016.
The Bryher Woman was a celtic iron-age woman whose cist grave, containing a mirror and a sword, was discovered on Bryher, Isles of Scilly, in 1999. In 2023, scientists announced that analysis of the tooth fragments showed her to be female.
=== Historians' analysis === The Space Race was deeply intertwined with Cold War rivalries and reflected broader ideological contests between the United States and the Soviet Union. Historian Walter A. McDougall highlights how space exploration served as a demonstration of each superpower's political and technological systems, with the U.S. emphasizing transparency and democratic values, and the USSR showcasing the capabilities of its centralized, state-driven model. Asif A. Siddiqi stresses the importance of viewing the Space Race as more than a single-event competition. He notes that while the U.S. achieved the symbolic "big one" with the Apollo missions, the Soviet Union's early and sustained achievements in robotic lunar and interplanetary exploration reveal the broader, multi-faceted nature of the rivalry.
Sources: en.wikipedia.org
=== Legal status === In June 2025, the Committee for Veterinary Medicinal Products of the European Medicines Agency adopted a positive opinion, recommending the granting of a marketing authorization for the veterinary medicinal product Numelvi, tablets, intended for dogs. The applicant for this veterinary medicinal product is Intervet International B.V.
In 1999, the Institute of Medicine published the Safety of Silicone Breast Implants (1999) study that reported no evidence that saline-filled and silicone-gel filled breast implant devices caused systemic health problems; that their use posed no new health or safety risks; and that local complications are "the primary safety issue with silicone breast implants", in distinguishing among routine and local medical complications and systemic health concerns." In 2000, the FDA approved saline breast implant Premarket Approval Applications (PMA) containing the type and rate data of the local medical complications experienced by the breast surgery patients. "Despite complications experienced by some women, the majority of those women still in the Inamed Corporation and Mentor Corporation studies, after three years, reported being satisfied with their implants." The premarket approvals were granted for breast augmentation, for women at least 18 years old, and for women requiring breast reconstruction. In 2006, for the Inamed Corporation and for the Mentor Corporation, the U.S. Food and Drug Administration lifted its restrictions against using silicone-gel breast implants for breast reconstruction and for augmentation mammoplasty. Yet, the approval was conditional upon accepting FDA monitoring, the completion of 10-year-mark studies of the women who already had the breast implants, and the completion of a second, 10-year-mark study of the safety of the breast implants in 40,000 other women.
== Medical uses == Histidine’s role in skin health has attracted research interest because the amino acid is a precursor to filaggrin, a structural protein that helps maintain the integrity of the skin’s outer barrier. Filaggrin is rich in histidine and, when broken down, contributes to the natural moisturizing factor that helps retain moisture and supports barrier function. Clinical studies suggest that oral L-histidine supplementation can increase filaggrin processing and improve skin barrier function, with corresponding reductions in the severity of atopic dermatitis (eczema) compared with placebo, potentially offering a safe, nonsteroidal adjunct to traditional therapies. In the skincare industry, biotechnology companies such as Codex Labs— a dermatology and firm developing skin-gut-brain-biome solutions for conditions including eczema — have incorporated histidine-containing formulations into products and supplements aimed at strengthening the skin barrier and supporting sensitive skin, reflecting growing interest in histidine’s functional importance beyond its canonical metabolic roles.
Sources: en.wikipedia.org
It is a synthetic research compound that activates REV-ERB nuclear receptors. It is not an approved drug or dietary supplement. Most information comes from cell and animal studies.
It binds REV-ERBα and REV-ERBβ and changes transcription of metabolic genes. This can affect circadian rhythm, lipid use, and mitochondrial function. The full downstream effects are still under study.
No. Some rodent studies show increased endurance, but controlled human trials are lacking. Claims about human performance are not established by published evidence.
SR9009 is a synthetic compound investigated as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is used in preclinical research on circadian rhythm and metabolism. It is not an approved drug.