The short version of research chemical fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-04-12 and is reviewed periodically as new material appears.
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.
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.
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 powder | Typical for research-grade material |
| Solubility | Soluble in DMSO and ethanol; low aqueous solubility | Organic stock solutions are common |
| Typical storage temperature | -20 °C or lower | Protect from light and moisture |
| Common analytical method | LC-MS/MS | Used for detection and confirmation |
| Common synonyms | SR9009; Stenabolic | Stenabolic is an informal name |
REV-ERB proteins typically suppress gene expression by recruiting corepressor complexes to DNA response elements. SR9009 binds these receptors and strengthens that repressive action in cell-based assays. Studies in rodents have reported changes in lipid handling, mitochondrial function, and exercise capacity after treatment. Such findings are often cited as evidence for metabolic effects, but species differences and limited pharmacokinetic data make direct translation to humans uncertain. Researchers continue to examine which effects are robust and which depend on specific experimental conditions.
SR9009 is frequently discussed alongside other REV-ERB ligands, including synthetic agonists and natural heme-related molecules. Its selectivity for REV-ERB over related nuclear receptors has been measured in binding and reporter assays, though off-target activity at higher concentrations is possible. The compound is prohibited in sport by the World Anti-Doping Agency, and it is not approved for any medical use in major jurisdictions. Products sold online may be labeled as research chemicals, and their identity and purity are not guaranteed by regulatory review.
SR9009 is a synthetic small molecule that acts on the nuclear receptors REV-ERBα and REV-ERBβ. These receptors are part of the circadian clock machinery and normally repress transcription of certain target genes. In laboratory research, SR9009 is used as a chemical tool to study how REV-ERB activity influences metabolism, inflammation, and daily biological rhythms. The compound is not an approved medicine, and its effects in humans remain largely uncharacterized. It is often described as an investigational agent rather than a therapeutic product.
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.
Laboratory samples of SR9009 are typically handled as research chemicals rather than pharmaceuticals. Suppliers usually state that the material is for research use only and not for human or veterinary administration. Storage recommendations generally call for a freezer at approximately −20 °C, protection from light, and a desiccated environment. The solid is often described as a white to off-white powder. Solubility is commonly reported in organic solvents such as dimethyl sulfoxide and ethanol, with low solubility in water.
Analytical identification and purity assessment often use high-performance liquid chromatography with ultraviolet detection or mass spectrometry. Liquid chromatography–tandem mass spectrometry is used to detect and quantify SR9009 in biological matrices, including urine and blood, for anti-doping or pharmacokinetic studies. Nuclear magnetic resonance spectroscopy can confirm molecular structure. Stability depends on form and storage: the solid is generally more stable than solutions, and repeated freeze–thaw cycles may degrade samples. Purity is typically reported as a percentage from a certificate of analysis.
Regulatory treatment of SR9009 varies by country and context. It is not approved as a therapeutic drug by agencies such as the United States Food and Drug Administration or the European Medicines Agency. Sports authorities list it as a prohibited substance; the World Anti-Doping Agency classifies it among hormone and metabolic modulators. Legal status for personal possession or sale differs across jurisdictions, and some countries may restrict it under analog or research chemical laws. Buyers who seek verified material often rely on independent laboratory testing because online product labels may not match contents.
Analytical chemists detect SR9009 with liquid chromatography-tandem mass spectrometry, commonly abbreviated LC-MS/MS. Sample preparation may involve protein precipitation, liquid-liquid extraction, or solid-phase extraction before analysis. Laboratories can target the parent compound or its metabolites, depending on the matrix and the purpose of testing. Anti-doping methods require sensitive and specific assays because concentrations in biological samples can be low. Reference standards and validated methods are essential for reliable identification and quantification.
Regulatory agencies have not approved SR9009 for human therapeutic use. It is typically sold as a research chemical with labels stating that it is not for human consumption. The World Anti-Doping Agency prohibits the substance in sport, generally under the category of non-approved substances. Customs and national laws may restrict importation, sale, or possession. Product quality and legal status can vary by country and vendor, and therapeutic claims are not permitted in regulated advertising because the compound lacks approval.
== Treatment == Systemic steroids are considered the first line treatment for organizing pneumonia, with patient's often having clinical improvement within 72 hours of steroid initiation and most patients achieving recovery. A prolonged treatment course is indicated, with patients usually requiring at least 4–6 months of treatment. Patients who are treated with larger doses of steroids require prophylaxis against Pneumocystis jirovecii. Relapses may occur and are more likely to occur in severe disease or when steroids are tapered too soon or too quickly. Alternative or adjunct treatment options include macrolide antibiotics (due to anti-inflammatory properties), azathioprine and cyclophosphamide.
=== Anatomy === Exertional rhabdomyolysis results from damage to the intracellular proteins inside the sarcolemma. Myosin and actin break down in the sarcomeres when ATP is no longer available due to injury to the sarcoplasmic reticulum. Damage to the sarcolemma and sarcoplasmic reticulum from direct trauma or high force production causes a high influx of calcium ions into the muscle fibers increasing calcium permeability. Calcium ions build up in the mitochondria, impairing cellular respiration. The mitochondria are unable to produce enough ATP to power the cell properly. Reduction in ATP production impairs the cells' ability to extract calcium from the muscle cell. The ion imbalance causes calcium-dependent enzymes to activate which break down muscle proteins even further. A high concentration of calcium activates muscle cells, causing the muscle to contract while inhibiting its ability to relax. The increase of sustained muscle contraction leads to oxygen and ATP depletion with prolonged exposure to calcium. The muscle cell membrane pump may become damaged allowing free form myoglobin to leak into the bloodstream.
== Career == After completing his doctorate, Al-Fawzan was appointed as a teacher at the Ma'had al-'Ilmī (Institute of Knowledge) at the Imam Muhammad ibn Saud Islamic University in Riyadh. He subsequently taught at Kullīyat al-Sharī'a (The College of Sharia), then transferred to teach in the postgraduate program at Kullīyat Uṣūl al-Dīn (College of Fundamentals of Religion), then at the Ma'had al-'Ālī li al-Qaḍā (Higher Institute of Judiciary), where he was later appointed director. He later served as the head of Saudi Arabia's Supreme Court of Justice before returning to teaching following the conclusion of his tenure. As of 2013, he was appointed as a member of the Council of Senior Scholars, Saudi Arabia's highest religious body, which directly advises the King of Saudi Arabia. He is also currently a member of the fiqh council in Mecca, which is affiliated with the Muslim World League, and of the Permanent Committee for Scholarly Research and Ifta, a subcommittee of the Council of Senior Scholars responsible for issuing legal opinions (fatwas) in Islamic jurisprudence (fiqh) and preparing research papers for the Council. Al-Fawzan serves on the Supervisory Committee for Preachers during Hajj and is an imam, khatib and teacher at the Prince Mutaib bin Abdulaziz Al Saud Mosque in Riyadh. He is one of the scholars featured on the Nūr 'Alā al-Darb radio program, described as one of the oldest and most famous programs broadcast on the Quran radio channel, where senior scholars answer questions and issue fatwas.
Salts are characteristically insulators. Although they contain charged atoms or clusters, these materials do not typically conduct electricity to any significant extent when the substance is solid. In order to conduct, the charged particles must be mobile rather than stationary in a crystal lattice. This is achieved to some degree at high temperatures when the defect concentration increases the ionic mobility and solid state ionic conductivity is observed. When the salts are dissolved in a liquid or are melted into a liquid, they can conduct electricity because the ions become completely mobile. For this reason, molten salts and solutions containing dissolved salts (e.g., sodium chloride in water) can be used as electrolytes. This conductivity gain upon dissolving or melting is sometimes used as a defining characteristic of salts. In some unusual salts: fast-ion conductors, and ionic glasses, one or more of the ionic components has a significant mobility, allowing conductivity even while the material as a whole remains solid. This is often highly temperature dependent, and may be the result of either a phase change or a high defect concentration. These materials are used in all solid-state supercapacitors, batteries, and fuel cells, and in various kinds of chemical sensors.
A protein precursor, also called a pro-protein or pro-peptide, is an inactive protein (or peptide) that can be turned into an active form by post-translational modification, such as breaking off a piece of the molecule or adding on another molecule. The name of the precursor for a protein is often prefixed by pro-. Examples include proinsulin and proopiomelanocortin, which are both prohormones. Protein precursors are often used by an organism when the subsequent protein is potentially harmful, but needs to be available on short notice and/or in large quantities. Enzyme precursors are called zymogens or proenzymes. Examples are enzymes of the digestive tract in humans. Some protein precursors are secreted from the cell. Many of these are synthesized with an N-terminal signal peptide that targets them for secretion. Like other proteins that contain a signal peptide, their name is prefixed by pre. They are thus called pre-pro-proteins or pre-pro-peptides. The signal peptide is cleaved off in the endoplasmic reticulum. An example is preproinsulin. Pro-sequences are areas in the protein that are essential for its correct folding, usually in the transition of a protein from an inactive to an active state. Pro-sequences may also be involved in pro-protein transport and secretion. Pro-domain (or prodomain) is the domain of a proprotein.
Sources: en.wikipedia.org
The 1578 death of King Sebastian in battle and the subsequent 1580 death of King Henry without a named heir, precipitated a succession crisis. Philip II of Spain, whose mother was Isabella of Portugal, was one of the candidates for the throne. In 1581 he was acclaimed king of Portugal, creating a personal union between the two kingdoms. This deprived Portugal of an independent foreign policy and led to the Dutch-Portuguese War. In 1641, John, Duke of Braganza, was proclaimed king by the Cortes after an uprising led by some nobles in the year before, ending the Iberian Union under the House of Habsburg, and beginning the rule of the House of Braganza. Following the Portuguese Restoration War, Spain recognised Afonso VI as king of Portugal. During the reign of John V, the large influx of Brazilian gold into the royal treasury, chiefly through the royal fifth, produced a resource curse that weakened industry and cereal production, created a gold rush from Portugal to Brazil, and led to prolonged economic stagnation, permanent reduction of income growth, and the interruption of the institutional and economic progress achieved in the 17th century. After the depletion of gold revenues, Portugal was left with a weak industrial base and backward institutional and educational structures. This condition was exacerbated by Sebastião José de Carvalho e Melo, 1st Marquis of Pombal, who emerged as the country's de facto ruler in the aftermath of the 1755 earthquake and tsunami, one of the kingdom's worst recorded natural disaster.
== Pharmacokinetics == Abacavir is given orally and is rapidly absorbed with a high bioavailability of 83%. Solution and tablet have comparable concentrations and bioavailability. Abacavir can be taken with or without food. Abacavir can cross the blood–brain barrier. Abacavir is metabolized primarily through the enzymes alcohol dehydrogenase and glucuronyl transferase to an inactive carboxylate and glucuronide metabolites. It has a half-life of approximately 1.5-2.0 hours. If a person has liver failure, abacavir's half-life is increased by 58%. Abacavir is eliminated via excretion in the urine (83%) and feces (16%). It is unclear whether abacavir can be removed by hemodialysis or peritoneal dialysis.
Valve was named as a defendant in two lawsuits in June and July 2016 related to third-party gambling sites that use the Steamworks API to allow betting with the virtual currency of cosmetic weapon replacement textures, better known as "skins", from Counter-Strike: Global Offensive, which through these sites can be converted from or to real-world money. Both suits assert Valve aiding in underaged gambling. Valve subsequently stated it has no commercial ties with these sites, and that it would demand these sites cease their use of the Steamworks API as they violate the authorized use policies. In October 2016, the Washington State Gambling Commission required Valve to stop the use of virtual skins for gambling on Steam, stating they would face legal repercussions if they failed to co-operate. On October 17, 2016, Valve sent a letter to the Washington State Gambling Commission stating that it had "no business relationship with such gambling sites", asserting that they come into existence, operate, and go out of existence without its knowledge and consent, adding that it was not aware of any such law that Steam or any of its games were violating.
==== Absorption and bioavailability ==== The oral bioavailability of estradiol is very low. This is due to the fact that estradiol is poorly soluble in water, which limits its dissolution and absorption, and is additionally subject to extensive metabolism during the first pass through the intestines and liver. Estradiol is micronized and/or conjugated with an ester, as in estradiol valerate or estradiol acetate, to improve its oral bioavailability and potency. Micronization decreases the particle size of estradiol crystals and hence increases the surface area for absorption, thereby improving the rate and extent of absorption. In addition, there is an improvement in metabolic stability. Oral micronized estradiol consists of more than 80% of estradiol particles micronized to a size smaller than 20 μm in diameter, or to about 1 to 3 μm on average. All oral formulations of estradiol available today are micronized, and oral estradiol valerate tablets also seem to be micronized. Oral non-micronized estradiol and oral micronized estradiol do not appear to have ever been directly compared in a study. Both have been assessed independently however, and have been found to produce significant estrogenic effects. Micronization of other poorly water-soluble steroids such as spironolactone and norethisterone acetate has been found to increase their potency by several-fold.
Sources: en.wikipedia.org
Blood smear examination is usually performed in conjunction with a complete blood count in order to investigate abnormal results or confirm results that the automated analyzer has flagged as unreliable. Microscopic examination of the shape, size, and coloration of red blood cells is useful for determining the cause of anemia. Disorders such as iron deficiency anemia, sickle cell anemia, megaloblastic anemia and microangiopathic hemolytic anemia result in characteristic abnormalities on the blood film. The proportions of different types of white blood cells can be determined from the blood smear. This is known as a manual white blood cell differential. The white blood cell differential can reveal abnormalities in the proportions of white blood cell types, such as neutrophilia and eosinophilia, as well as the presence of abnormal cells such as the circulating blast cells seen in acute leukemia. Qualitative abnormalities of white blood cells, like toxic granulation, are also visible on the blood smear. Modern complete blood count analyzers can provide an automated white blood cell differential, but they have a limited ability to differentiate immature and abnormal cells, so manual examination of the blood smear is frequently indicated. Blood smear examination is the preferred diagnostic method for certain parasitic infections, such as malaria and babesiosis. Rarely, bacteria may be visible on the blood smear in patients with severe sepsis.
Evidence in livestock is limited. One study in Holstein calves following castration found nalbuphine to provide inadequate analgesia and sedation. In goats one study found that nalbuphine combined with ketamine provided better post-operative analgesia than ketamine by itself at a higher dose.
== Recommended storage temperature == The cold chain has been one of the most reliable supply chains for transporting vaccines around the globe. Since vaccines are sensitive biological products, proper storage and handling of vaccines are important to ensure the potency of vaccines is not lost. Vaccines must be continuously monitored as each has different reactivity to low temperature, high temperature, and light. The majority of vaccines required storage temperature of +35° to +46 °F (+2° to +8 °C) and must not be exposed to freezing temperature. Temperature too cold can result in an irreversible reaction that reduces vaccines potency and loss in adjuvant effect. Certain vaccines contain adjuvants (aluminum) that will precipitate when exposed to freezing temperatures. Temperature too hot could also result in wanted viruses permanently degrading and losing potency. However, the effects are usually smaller, gradual, and predictable than from freezing temperatures. Visible signs of physical changes after exposure to undesirable temperature are not necessary to result in a decrease of vaccine potency.
Sources: en.wikipedia.org
Research-grade SR9009 is typically stored frozen at about minus twenty degrees Celsius, protected from light and moisture. Stock solutions are often kept in aliquots to avoid repeated freeze-thaw cycles. Specific storage conditions should follow the supplier's documentation.
Liquid chromatography with tandem mass spectrometry is widely used to detect and confirm SR9009 in laboratory samples. The technique offers high sensitivity and can distinguish the target compound from related substances. Nuclear magnetic resonance and ultraviolet detection may support identity and purity checks.
Online products labeled as SR9009 may vary in identity, purity, and actual content. Independent testing helps confirm that a sample matches its label and does not contain unexpected contaminants. This is important for reproducible research and for interpreting experimental results.
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.