A practical reference on anti-doping: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2025-09-03 and is reviewed periodically as new material appears.
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 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.
| 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 |
For long-term storage, SR9009 is typically kept as a solid at low temperature, protected from moisture and light. Desiccated conditions limit hydrolysis, while opaque containers reduce photochemical breakdown. Solutions are less stable than solids and are often stored frozen in aliquots to avoid repeated freeze-thaw cycles. Stability data are not standardized across all suppliers, so users should rely on certificate-of-analysis information when available. Degradation may appear as color change, precipitate, or decreased chromatographic purity.
Laboratory identification of SR9009 typically relies on chromatographic separation coupled to mass spectrometry, often with ultraviolet detection as a secondary check. Nuclear magnetic resonance spectroscopy can confirm molecular structure when a reference standard is available. Because many suppliers sell the compound as a research chemical, independent identity testing is important for experimental reproducibility. A single retention time is not sufficient proof of identity, especially when related compounds may be present. Purity assessments usually report a percentage based on area normalization.
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.
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.
Several misconceptions surround SR9009. It is often described as a SARM, a steroid, or an exercise pill, but its known target is the REV-ERB receptor family. Rodent studies have examined exercise capacity and metabolic markers, yet human outcomes remain unproven. Oral bioavailability appears low in animals, and human pharmacokinetics are not well characterized. Online products may contain impurities or different compounds, so identity and purity testing are important for research use.
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.
On December 24, 1851, the largest fire in the library's history destroyed 35,000 books, two-thirds of the library's collection, and two-thirds of Thomas Jefferson's original transfer. Congress appropriated $168,700 to replace the lost books in 1852 but not to acquire new materials. (By 2008, the librarians of Congress had found replacements for all but 300 of the works that had been documented as being in Jefferson's original collection.) This marked the start of a conservative period in the library's administration by librarian John Silva Meehan and joint committee chairman James A. Pearce, who restricted the library's activities. Meehan and Pearce's views about a restricted scope for the Library of Congress reflected those shared by members of Congress. While Meehan was a librarian, he supported and perpetuated the notion that "the congressional library should play a limited role on the national scene and that its collections, by and large, should emphasize American materials of obvious use to the U.S. Congress." In 1859, Congress transferred the library's public document distribution activities to the Department of the Interior and its international book exchange program to the Department of State. During the 1850s, Smithsonian Institution librarian Charles Coffin Jewett aggressively tried to develop the Smithsonian as the United States national library. His efforts were rejected by Smithsonian secretary Joseph Henry, who advocated a focus on scientific research and publication.
Coral aquaculture, also known as coral farming or coral gardening, is the cultivation of corals for commercial purposes or coral reef restoration. Aquaculture is showing promise as a potentially effective tool for restoring coral reefs, which have been declining around the world. The process bypasses the early growth stages of corals when they are most at risk of dying. Coral fragments known as "seeds" are grown in nurseries then replanted on the reef. Coral is farmed by coral farmers who live locally to the reefs and farm for reef conservation or for income. It is also farmed by scientists for research, by businesses for the supply of the live and ornamental coral trade and by private aquarium hobbyists.
=== Mechanical === Adhesive materials fill the voids or pores of the surfaces and hold surfaces together by interlocking. Other interlocking phenomena are observed on different length scales. Sewing is an example of two materials forming a large scale mechanical bond, velcro forms one on a medium scale, and some textile adhesives (glue) form one at a small scale.
== History == Biuret was first prepared and studied by Gustav Heinrich Wiedemann (1826–1899) for his doctoral dissertation, which was submitted in 1847. His findings were reported in several articles.
== History == SPAR began in 1994 at the New England Deaconess Hospital (now Beth Israel Deaconess Medical Center) as a support group for couples wishing to parent when one of them had an incurable sexually transmitted disease. The patient couples began raising money to fund the research needed to develop the methods to improve the safety of attempting pregnancy. By 1996 sufficient funds were available to begin, but a merger between the Beth Israel Hospital and the New England Deaconess Hospital (now Beth Israel Deaconess Medical Center) necessitated the creation of an independent Massachusetts public charity, the Assisted Reproduction Foundation (now the Bedford Stem Cell Research Foundation directed by Dr. Ann Kiessling), to continue the work. Within two years, the methods for reducing, and perhaps eliminating, the risks of infection to the mother and the child were developed and Baby Ryan was born in 1999. The goal of SPAR was to provide semen testing by experts that would ensure improved safety of sperm that could then be shipped to infertility clinics near the couple's home. In this way, couples could be cared for in the same manner as other couples in their community. Fortunately, a few clinics were willing to help with this effort, and by 2002, seven collaborating clinics around the country were caring for couples living with HIV disease. In the Spring of 2000 a ground breaking study was completed, giving significant insight to the role of semen producing organs in HIV anti-viral therapy.
Sources: en.wikipedia.org
== External links == Pro-Opiomelanocortin at the U.S. National Library of Medicine Medical Subject Headings (MeSH) Overview of all the structural information available in the PDB for UniProt: P01189 (Pro-opiomelanocortin) at the PDBe-KB. This article incorporates public domain material from Reference Sequence collection. National Center for Biotechnology Information.
=== Piperidines and tropanes === Tropane alkaloids occur in plants of the families erythroxylaceae (including coca). Piperidine and its derivatives are ubiquitous building blocks in the synthesis of many pharmaceuticals and fine chemicals.
== Causes == The causes of MPS are not fully documented or understood. At least one study rules out trigger points: "The theory of myofascial pain syndrome (MPS) caused by trigger points (TrPs) ... has been refuted. This is not to deny the existence of the clinical phenomena themselves, for which scientifically sound and logically plausible explanations based on known neurophysiological phenomena can be advanced." Some systemic diseases, such as connective tissue disease, can cause MPS. Poor posture and emotional disturbance might also instigate or contribute to MPS.
=== As a biochemical tool === Concanavalin A and other commercially available lectins have been used widely in affinity chromatography for purifying glycoproteins. In general, proteins may be characterized with respect to glycoforms and carbohydrate structure by means of affinity chromatography, blotting, affinity electrophoresis, and affinity immunoelectrophoreis with lectins, as well as in microarrays, as in evanescent-field fluorescence-assisted lectin microarray.
== Production == In 2009, the worldwide capacity for producing formic acid was 720 thousand tonnes (1.6 billion pounds) per year, roughly equally divided between Europe (350 thousand tonnes or 770 million pounds, mainly in Germany) and Asia (370 thousand tonnes or 820 million pounds, mainly in China) while production was below 1 thousand tonnes or 2.2 million pounds per year in all other continents. It is commercially available in solutions of various concentrations between 85 and 99 w/w %. As of 2009, the largest producers are BASF, Eastman Chemical Company, LC Industrial, and Feicheng Acid Chemicals, with the largest production facilities in Ludwigshafen (200 thousand tonnes or 440 million pounds per year, BASF, Germany), Oulu (105 thousand tonnes or 230 million pounds, Eastman, Finland), Nakhon Pathom (n/a, LC Industrial), and Feicheng (100 thousand tonnes or 220 million pounds, Feicheng, China). 2010 prices ranged from around €650/tonne (equivalent to around $800/tonne) in Western Europe to $1250/tonne in the United States.
Sources: en.wikipedia.org
=== Central bankers === In a joint public statement released the day after Powell announced the subpoenas and investigation, former Federal Reserve Chairs Alan Greenspan, Ben Bernanke, and Janet Yellen, former U.S. Secretaries of the Treasury Henry Paulson, Timothy Geithner, Robert Rubin, and Jacob Lew, economists Glenn Hubbard, Kenneth Rogoff, and Jared Bernstein with others in defense of Powell that argued that the investigation was "an unprecedented attempt to use prosecutorial attacks to undermine [the Federal Reserve's] independence", and that "This is how monetary policy is made in emerging markets with weak institutions, with highly negative consequences for inflation and the functioning of their economies more broadly". In an interview with CNBC, Yellen further condemned the investigation and stated that Trump's demands for the Federal Reserve to cut its interest rates to lower interest payments on the national debt "is the road to a banana republic." Likewise, New York Federal Reserve Bank President John C. Williams, Chicago Federal Reserve Bank President Austan Goolsbee, Minneapolis Federal Reserve Bank President Neel Kashkari, and Atlanta Federal Reserve Bank President Raphael Bostic publicly criticized the investigation as undermining the Federal Reserve's independence while speaking in defense of Powell's personal character, echoing concerns about potentially higher inflation, and asserting that the investigation is about the central bank's monetary policies rather than the cost overruns of the renovation projects.
==== Corona treatment ==== Corona treatment is a surface modification method using a low temperature corona discharge to increase the surface energy of a material, often polymers and natural fibers. Most commonly, a thin polymer sheet is rolled through an array of high-voltage electrodes, using the plasma created to functionalize the surface. The limited penetration depth of such treatment provides vastly improved adhesion while preserving bulk mechanical properties. Commercially, corona treatment has been used widely for improved dye adhesion before printing text and images on plastic packaging materials. The hazardous nature of remnant ozone after corona treatment stipulates careful filtration and ventilation during processing, restricting its implementation to applications with strict catalytic filtered systems. This limitation prevents widespread use within open-line manufacturing processes Several factors influence the efficiency of the flame treatment such as air-to-gas ratio, thermal output, surface distance, and oxidation zone dwell time. Upon conception of the process, a corona treatment immediately followed film extrusions, but the development of careful transportation techniques allows treatment at an optimized location. Conversely, in-line corona treatments have been implemented into full-scale production lines such as those in the newspaper industry. These in-line solutions are developed to counteract the decrease in wetting characteristics caused by excessive solvent use.
== External links == Die Geschichte des Wirkstoffs Cyproteronazetat: Von der "Pille für den Mann" zum "Hautpflegemittel mit Empfängnisschutz" [The History of Cyproterone Acetate: From the "Pill for Men" to the "Skin Care Product and Contraceptive"] - Arznei-Telegramm (in German) [Google Translate]
In rural Afghanistan, grapes are preserved in disc-shaped vessels made of mud and straw, called kangina. The vessels, which can preserve fresh grapes for up to 6 months, passively control their internal environments to restrict gas exchange and water loss, prolonging the lives of late-harvested grapes stored within them.
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.
SR9009 is a synthetic research compound that binds and modulates the nuclear receptors REV-ERBα and REV-ERBβ. It is used in laboratory studies of circadian biology and metabolism, not as an approved medicine. It is also known by the informal name Stenabolic.