Everything below concerns SR9009. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-03-21. Where a claim depends on a specific study, the study is described rather than over-claimed.
Regulatory status varies by country and intended use. Major drug agencies have not granted marketing authorization for SR9009 as a medicine, and it is not listed as a controlled substance in many jurisdictions. It is often sold as a research chemical, a category that may fall outside pharmaceutical manufacturing rules. Buyers should verify local laws and supplier documentation, including certificates of analysis. The lack of standardized quality controls raises concerns about identity, purity, and actual content in products marketed online.
In laboratory settings, SR9009 is commonly identified by its molecular structure and its interaction with REV-ERB receptors. Vendors may list it under synonyms such as Stenabolic or REV-ERB agonist, but those names do not define purity or identity. Analytical confirmation typically uses high-performance liquid chromatography with ultraviolet detection or liquid chromatography–mass spectrometry. A reference standard is needed to compare retention time and mass spectrum, because the compound can be confused with related research chemicals.
Handling practices for SR9009 focus on minimizing degradation and contamination. The solid is generally stored desiccated at or below -20 °C, protected from light and moisture. Stock solutions are often prepared in dimethyl sulfoxide or ethanol, then aliquoted to avoid repeated freeze–thaw cycles. Aqueous solubility is low, so formulations for animal studies may require cosolvents or suspending agents. Personnel should follow institutional chemical safety procedures, because toxicological data for humans are incomplete.
Detection of SR9009 in biological samples usually employs liquid chromatography coupled with tandem mass spectrometry. This method can identify the parent compound and sometimes metabolites in urine or blood. Because exposure can be low and clearance may be rapid, sample timing and limits of detection matter. Laboratories validate assays for sensitivity and specificity. Results are interpreted alongside chain-of-custody and quality-control records. Urine is the common matrix for anti-doping analysis, while blood may be used in research settings.
Handling recommendations for SR9009 in a laboratory setting include storing the solid at low temperature, protected from light and moisture. The compound is often dissolved in dimethyl sulfoxide or ethanol for experiments. Solutions should be prepared with appropriate personal protective equipment and disposed of according to local rules. Stability data for long-term storage are limited, so stock solutions are typically kept cold and used within defined periods. Records of preparation date and concentration support reproducibility.
SR9009 is not approved as a medicine by major regulatory agencies. It is commonly sold as a research chemical, a category that may fall outside customary drug approval and quality rules. In sports, the World Anti-Doping Agency lists SR9009 as a prohibited substance. Athletes who use it can face sanctions if it is detected in a sample. Legal status varies by country, and importation may be restricted. Enforcement practices differ across borders.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white solid | Visual inspection is not sufficient for identity. |
| Solubility | Soluble in DMSO and ethanol | Low solubility in water. |
| Typical storage | -20 °C, desiccated, dark | Protect from repeated temperature changes. |
| Common analytical method | LC-MS or HPLC-UV | Reference standard required for comparison. |
| Common synonyms | SR9009; Stenabolic; REV-ERB agonist | Vendor naming may vary. |
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 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.
Mechanistically, SR9009 binds the ligand-binding domain of REV-ERBα/β and enhances recruitment of corepressor complexes. This represses target genes rather than activating them. Because REV-ERB proteins normally compete with ROR proteins at shared response elements, the net effect depends on tissue and timing. Researchers use SR9009 to probe how nuclear receptor signaling links the clock to metabolism, inflammation, and muscle biology. Findings are largely preclinical, and the precise contribution of each receptor subtype remains under study.
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 an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not an approved medicine and has no established human therapeutic use. The compound appears in scientific literature as a tool for probing circadian and metabolic regulation. Online sellers often label it as a research chemical, sometimes using the nickname Stenabolic. Its chemical identity is distinct from selective androgen receptor modulators, stimulants, and peroxisome proliferator-activated receptor delta agonists. Researchers use it mainly in cell and animal experiments.
At the molecular level, SR9009 binds REV-ERBα and REV-ERBβ and alters their repressive activity on target genes. These nuclear receptors help regulate the circadian clock, lipid synthesis, glucose metabolism, and inflammatory pathways. By changing transcription, the compound can shift the timing or magnitude of downstream metabolic processes in model systems. It does not act through androgen receptors or adenosine receptors, which distinguishes it from several substances sold for athletic performance. Whether the same transcriptional changes occur in humans at tolerable exposures remains an open question because controlled human studies are lacking.
Laboratory samples of SR9009 are typically supplied as a white to off-white powder. The compound dissolves readily in organic solvents such as dimethyl sulfoxide and ethanol, while its solubility in water is low. Because of this solubility profile, researchers often prepare concentrated stock solutions in an organic solvent before diluting them into aqueous assay buffers. Light exposure, moisture, and repeated freeze-thaw cycles can degrade many small molecules, so handling procedures usually aim to minimize these factors. Purity is commonly checked before use.
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.
== Pathology == The most commonly affected region of the brain is the lenticular nucleus and in particular the internal globus pallidus. Calcifications in the caudate, dentate nuclei, putamen and thalami are also common. Occasionally calcifications begin or predominate in regions outside the basal ganglia. Calcification seems to be progressive, since calcifications are generally more extensive in older individuals and an increase in calcification can sometimes be documented on follow up of affected subjects. As well as the usual sites the cerebellar gyri, brain stem, centrum semiovale and subcortical white matter may also be affected. Diffuse atrophic changes with dilatation of the subarachnoid space and/or ventricular system may coexist with the calcifications. Histologically concentric calcium deposits within the walls of small and medium-sized arteries are present. Less frequently the veins may also be affected. Droplet calcifications can be observed along capillaries. These deposits may eventually lead to closure of the lumina of vessels. The pallidal deposits stain positively for iron. Diffuse gliosis may surround the large deposits but significant loss of nerve cells is rare. On electron microscopy the mineral deposits appear as amorphous or crystalline material surrounded by a basal membrane. Calcium granules are seen within the cytoplasm of neuronal and glial cells. The calcifications seen in this condition are indistinguishable from those secondary to hypoparathyroidism or other causes.
=== January === 2 January – A truck collides with a bus in Rio Grande do Sul, killing 11 people and injuring seven others. 8 January – President Lula vetoes a bill that would have reduced the prison sentence of former president Jair Bolsonaro over the 2022–2023 Brazilian coup plot from 27 years to two. A court in Minas Gerais sentences a former Roman Catholic priest based in Contagem to 24 years' imprisonment for raping a minor in 2016. 14 January – Four people are killed in a police operation against the Comando Vermelho in the Salgueiro favela of Rio de Janeiro. 22 January – Anvisa bans the sale, distribution, manufacturing, import, advertising, and use of medications based on tirzepatide from unlicensed companies.
== Further reading == "The Paiche Hunter" – New Worlder Froese, Rainer; Pauly, Daniel (eds.). "Arapaima gigas". FishBase. January 2009 version. Gourmet Magazine (May 2007 Volume LXVII No. 5) Article: "The Quarter Ton Fish" pg. 106; Condé Nast Publications National Geographic News "Search Is on for World's Biggest Freshwater Fish"
The company's primary competitors for its hardware are Nvidia, AMD, Intel, and Broadcom and the company's primary competitors for its cloud computing services are Amazon Web Services, Microsoft Azure, Google Cloud Platform, Oracle Corporation, and CoreWeave.
Sources: en.wikipedia.org
In road transport, the Emission Performance Regulation 2019 says manufacturers of "new passenger cars" should not allow emissions to exceed 95 grams of CO2 per kilometre, and 147 grams of CO2 per kilometre for new light commercial vehicles, but this is merely an "EU fleet-wide target" rather than requirements for each vehicle. Manufacturers can agree to pool their production quotas, so as to meet their targets on average, but there is no legal sanction for failure to meet the target. Member states are simply required to record the relevant success or failure, and manufacturers' performance is published. By contrast the Vehicles Emissions Regulation 2007 sets the "Euro 6" standards in maximum emissions that car manufacturers can have. Since the 'Euro 1' standard was introduced in 1992, standards became cleaner each 4 to 5 years, but recently stalled. Article 2 states this applies to vehicles under 2,610 kilograms, while the Heavy Vehicle Emission Regulation 2019 applies to heavier vehicles, with looser CO2 limits. Article 4 states manufacturers must 'demonstrate that all new vehicles sold, registered or put into service in the Community are type approved in accordance with this Regulation'. Article 6 requires manufacturers to 'provide unrestricted and standardised access to vehicle repair and maintenance information' should there be any non-compliance. Article 13 requires penalties imposed by member states for breach are 'effective, proportionate and dissuasive', and breaches include any 'false declarations' as well as 'use of defeat devices'.
An acellular dermal matrix (such as Alloderm) graft uses donated medically processed human skin tissue as a source for the graft. The advantage of this procedure is no need for a palatal donor site, and though some periodontists consider it equally successful as a subepithelial connective tissue graft, others consider it less successful. Guided bone reconstruction is a technique in which bone growth is enhanced by preventing soft tissue ingrowth into the desired area and utilizes either resorbable or nonresorbable membranes. Both metallic membranes and membranes supported by a titanium frame have been tested and have been successful. Through the advent of micro-surgical procedures these procedures have become more predictable and comfortable for the patients. Gum grafts are usually performed by periodontists who are trained in these procedures, though general-purpose dentists may offer the procedures themselves. Outcome comparisons between both are highly variable, though with periodontists being specially-trained, periodontists generally recommend patients seeking their services over general-practice dentists. A literature review in 2018 showed that the amount of gum recession patients had was reduced after most types of root coverage periodontal surgery procedures. Reported unwanted outcomes were discomfort and pain, mostly related to the site where the tissue graft was taken. This usually occurred in the first week after surgery and had no influence on root coverage outcomes.
The second most common type of protein in the blood plasma are globulins. Important globulins include immunoglobins which are important for the immune system and transport hormones and other compounds around the body. There are three main types of globulins. Alpha-1 and Alpha-2 globulins are formed in the liver and play an important role in mineral transport and the inhibition of blood coagulation. An example of beta globulin found in blood plasma includes low-density lipoproteins (LDL) which are responsible for transporting fat to the cells for steroid and membrane synthesis. Gamma globulin, better known as immunoglobulins, are produced by plasma B cells, and provides the human body with a defense system against invading pathogens and other immune diseases.
Sources: en.wikipedia.org
TCFH can also be used in other reactions involving activation of carboxylic acids from reactions with oxygen-, sulfur- and carbon-nucleophiles for the preparation of esters, thioesters and ketones. Extending beyond reactions with carboxylic acids, TCFH has been shown to be an activator for other oxygen centered nucleophiles, including heterocyclic alcohols, ketooximes, and even alcohols. Reactivity with sulfur centered nucleophiles like thioureas has also been demonstrated.
Diazepam was detected in 26% of cases of people suspected of driving under the influence of drugs in Sweden, and its active metabolite nordazepam, was detected in 28% of cases. Other drugs, zolpidem, and zopiclone were also found in high numbers. Many drivers had blood levels far exceeding the therapeutic dose range, suggesting a high degree of potential for misuse of the drugs zolpidem, and zopiclone. In Northern Ireland, in cases where drugs were detected in samples from impaired drivers who were not impaired by alcohol, benzodiazepines were found in 87% of cases. Diazepam was the most commonly detected benzodiazepine.
Starmer carries out another cabinet reshuffle in the wake of Rayner's resignation, appointing David Lammy as Deputy Prime Minister, Yvette Cooper as Foreign Secretary, and Shabana Mahmood as Home Secretary. Douglas Alexander is appointed Secretary of State for Scotland, replacing Ian Murray. Nigel Farage makes his keynote speech to the Reform UK annual conference, telling delegates they must prepare for an early election following Rayner's resignation. Members of the public are temporarily banned from the chamber of the House of Commons after a mobile phone was found hidden there during a security search. 8 September – The UK government outlines a new defence industrial strategy with £250m of investment in five local economies with a view to creating jobs and fuel growth. Kevin Stewart, a former Scottish Government minister and the MSP for Aberdeen Central, announces he will stand down from Holyrood at the 2026 election on health grounds. 9 September – A message from Peter Mandelson, the UK's ambassador to the United States, is included in a "birthday book" of messages to convicted paedophile Jeffrey Epstein released by the US Congress. Bridget Phillipson, Lucy Powell and Bell Ribeiro-Addy are the three Labour MPs with the most nominations for the Labour Party deputy leadership contest; they must reach 80 nominations to enter the contest. First Minister of Scotland John Swinney meets US President Donald Trump at the White House, where they have what are described as "constructive discussions" about tariffs on the import of scotch whisky to the United States.
Sources: en.wikipedia.org
Liquid chromatography–mass spectrometry is common for identity and purity checks. High-performance liquid chromatography with ultraviolet detection can also be used. Both methods require a suitable reference standard.
The solid is usually kept desiccated at -20 °C or lower and protected from light. Stock solutions are aliquoted to limit freeze–thaw cycles. Aqueous solutions are not generally recommended for long-term storage.
Laws differ by country and by intended use. It is not an approved medicine, and many vendors sell it as a research chemical. Purchasers are responsible for confirming local restrictions.
Its legal status depends on the country and intended use. It is not an approved medicine in major jurisdictions. In sport, it is prohibited by anti-doping rules.