The short version of certificate of analysis fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-04-10. Anything still debated is marked as such rather than presented as settled.
Physicochemical behavior influences handling. SR9009 is described as a solid with limited aqueous solubility, so organic solvents such as dimethyl sulfoxide or ethanol are common in research stock solutions. Aqueous dilution can produce precipitates if the organic content is too low. Light, heat, and repeated freeze-thaw cycles may affect stability. Storage recommendations usually specify a desiccated freezer environment protected from light, but exact stability data depend on the formulation and matrix.
Detection in biological samples can be complicated by rapid metabolism and low circulating concentrations. Some studies report phase I and phase II metabolites, and analytical methods may need to target those species in addition to the parent compound. Immunoassays are not broadly available, so mass spectrometry remains the main confirmatory approach. For anti-doping testing, laboratories look for SR9009 and its metabolites using validated LC-MS methods. Open questions include how long metabolites remain detectable and how different routes of administration alter detection windows.
In laboratory settings, SR9009 is typically characterized by liquid chromatography–mass spectrometry (LC-MS) or high-performance liquid chromatography with ultraviolet detection (HPLC-UV). These methods can confirm identity and estimate purity, but they require reference standards for accurate quantification. Because SR9009 is not a licensed pharmaceutical, no harmonized pharmacopeial monograph exists. Laboratories often validate in-house methods for matrices such as plasma, urine, or cell culture media. Sample preparation may involve protein precipitation or liquid-liquid extraction before analysis.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Appearance | Off-white to pale yellow solid | Visual description varies with purity and source |
| Solubility | Soluble in DMSO and ethanol; poorly soluble in water | Organic stock solutions are common in research |
| Typical storage | -20 °C, desiccated, protected from light | Avoid repeated freeze-thaw cycles |
| Typical analytical method | LC-MS or HPLC-UV | Reference standards are needed for quantification |
| Molar mass | Approximately 437.9 g/mol | Calculated from the reported free-base formula |
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 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.
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.
Most published work on SR9009 consists of preclinical studies. It is widely sold as a research chemical, a category that does not imply safety, efficacy, or pharmaceutical-grade quality. Sports anti-doping organizations have listed SR9009 as a prohibited substance, and its presence in an athlete sample can lead to sanctions. Legal status differs by country; in several jurisdictions it is not approved for human consumption and may be treated as an unapproved new drug.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not a steroid, peptide, or natural hormone. In scientific literature, it appears under the code SR9009 and in non-scientific contexts as Stenabolic. The compound was identified through chemical screening efforts aimed at targeting circadian clock components. Its status remains investigational, and no regulatory agency has approved it as a human medicine.
=== June === 1 June House prices in the UK are reported to have fallen by 3.4% in the year to May, the biggest decline since July 2009. The average property price is now estimated at £260,736. A ban on e-scooters carried on Southeastern, Southern, Thameslink and Gatwick Express trains comes into force, due to concerns over fire risk. 2 June – A visibly emotional Phillip Schofield gives an interview with the BBC's Amol Rajan, in which he apologises and says his "career is over" following the affair with a young male colleague. 3 June Train strikes staged by the ASLEF union cause disruption to the 2023 FA Cup final and a Beyoncé Knowles concert. In the FA Cup Final, the first in the 152-year history of the competition to feature a Manchester derby, Manchester City defeat rivals Manchester United 2–1 to win their seventh FA Cup trophy. A man is arrested at the FA Cup final after being pictured wearing a Manchester United shirt with the number 97 and the slogan "not enough", believed to be a reference to the Hillsborough disaster. The 33-year-old male is subsequently charged with displaying threatening or abusive writing likely to cause harassment, alarm or distress. A protestor is detained by police after attempting to disrupt the 2023 Epsom Derby by trespassing on the track. 6 June Record high numbers of gonorrhoea and syphilis infections are reported, following a dip during previous years.
=== Separation and quantitation === The amino acids can be separated by ion-exchange chromatography then derivatized to facilitate their detection. More commonly, the amino acids are derivatized then resolved by reversed phase HPLC. An example of the ion-exchange chromatography is given by the NTRC using sulfonated polystyrene as a matrix, adding the amino acids in acid solution and passing a buffer of steadily increasing pH through the column. Amino acids are eluted when the pH reaches their respective isoelectric points. Once the amino acids have been separated, their respective quantities are determined by adding a reagent that will form a coloured derivative. If the amounts of amino acids are in excess of 10 nmol, ninhydrin can be used for this; it gives a yellow colour when reacted with proline, and a vivid purple with other amino acids. The concentration of amino acid is proportional to the absorbance of the resulting solution. With very small quantities, down to 10 pmol, fluorescent derivatives can be formed using reagents such as ortho-phthaldehyde (OPA) or fluorescamine. Pre-column derivatization may use the Edman reagent to produce a derivative that is detected by UV light. Greater sensitivity is achieved using a reagent that generates a fluorescent derivative. The derivatized amino acids are subjected to reversed phase chromatography, typically using a C8 or C18 silica column and an optimised elution gradient.
== T == T cell – taphonomy – taxis – taxon – taxonomy – telomere – telophase – tertiary structure – testate amoebae – testes – Theodor Bilharz – Theodor Boveri – thermocline – thermoregulation – Thomas Hunt Morgan – Thomas Malthus – thylakoid – Tobacco mosaic virus – tobacco mosaic virus – torpor – Trait (biological) – transcription – transcription factor – transcriptional regulation – transformation – transgressive phenotype – transport vesicle – transposon – Traube cell – trophic level – tropism – tubulin – tumor – turgor – Turner syndrome – twin
== Later developments == In 1987 Pedro Cuatrecasas and Meir Wilchek were awarded the Wolf Prize in Medicine for the invention and development of affinity chromatography and its applications to biomedical sciences.
=== Solvent === Solvents are usually chosen based on the applications of the gel. They can be hydrophilic, lipophilic, or organic. Individual solvents can be used alone or as a mixture. Some examples of solvents include purified water, glycerin, glycols, alcohols, sucrose, toluene, and mineral oils.
Sources: en.wikipedia.org
Splenectomy (operative): This is the operative removal of the entire spleen by a surgeon, thus stopping the extravascular hemolysis, but also removing the immune functions that the spleen naturally provides to the body. Partial splenectomy (operative): This is when only a section of the spleen is removed, instead of the entire organ. The goal is to lower the extravascular hemolysis to a level compatible with homeostasis of the patient, while preserving the immune function of the spleen's presence. Research on outcomes is currently ongoing, and is routine at children's hospitals within the United States of America. Splenic ablation (interventional radiology): This option is non-operative, and is when an interventional radiologist (instead of a surgeon) uses radiologic techniques to coil or cauterize vasculature within the splenic circulation. There are various points in the circulatory pathway where the treatment can be applied to produces varying amounts of retained viability of the spleen, thus giving the option to attempt to preserve splenic immune function. All operative and interventional treatments require the immunization of HS patients against the influenza virus, SARS-CoV-2, and encapsulated bacteria such as Streptococcus pneumoniae and meningococcus. Antibiotics are no longer recommended for maintenance use, even in post-splenectomy HS patients. Since the spleen is important for protecting against encapsulated organisms, sepsis caused by encapsulated organisms is a possible complication of splenectomy. Additional elective treatments offered:
=== Biochemical applications === Multiple substituted isotopologues may be used for nuclear magnetic resonance or mass spectrometry experiments, where isotopologues are used to elucidate metabolic pathways in a qualitative (detect new pathways) or quantitative (detect quantitative share of a pathway) approach. A popular example in biochemistry is the use of uniform labelled glucose (U-13C glucose), which is metabolized by the organism under investigation (e. g. bacterium, plant, or animal) and whose signatures can later be detected in newly formed amino acid or metabolically cycled products.
== Regulation == Because governments regulate access to drugs, governments control drug distribution and the drug supply chain more than trade for other goods. Distribution begins with the pharmaceutical industry manufacturing drugs. From there, intermediaries in the public sector, private sector, and non-governmental organizations acquire drugs to provide them to other intermediaries. Eventually, the drugs reach different classes of consumers who use them. Good distribution practice (GDP) is an integrated system of procedures, standards and practices aimed at ensuring product quality at all stages of the supply chain, which includes requirements for purchase, receiving, storage, transportation and export of drugs intended for human consumption. It regulates the division and movement of pharmaceutical products from the premises of the manufacturer of medicinal products, or another central point, to the end user (usually defined as the medical facility or pharmacy that uses the product on or issues it to patients, or the retail outlet that sells to customers) thereof, or to an intermediate point by means of various transport methods, via various storage and/or health establishments.
=== Infrared ear thermometers === Diatek Corporation and NASA developed an aural thermometer that measures the thermal radiation emitted by the eardrum, similar to the way the temperature of stars and planets are measured. This method avoids contact with mucous membranes and permits rapid temperature measurement of newborn or incapacitated patients. NASA supported the Diatek Corporation through the Technology Affiliates Program.
Sources: en.wikipedia.org
Japanese and Korean sea-farmers have grown wakame for centuries, and are still both the leading producers and consumers. Wakame has also been cultivated in France since 1983, in sea fields established near the shores of Brittany. Wild-grown wakame is harvested in Tasmania, Australia, and then sold in restaurants in Sydney and also sustainably hand-harvested from the waters of Foveaux Strait in Southland, New Zealand and freeze-dried for retail and use in a range of products.
Fasting blood sugar (glucose) level of: 110 to 125 mg/dL (6.1 mmol/L to 6.9 mmol/L) – WHO criteria 100 to 125 mg/dL (5.6 mmol/L to 6.9 mmol/L) – ADA criteria Glucose tolerance test: blood sugar level of 140 to 199 mg/dL (7.8 to 11.0 mM) 2 hours after ingesting a standardized 75 gram glucose solution (WHO and ADA criteria) Glycated hemoglobin (HbA1c) between 5.7 and 6.4 percent, i.e., 38.9 and 46.4 mmol/mol Levels above these limits would justify a diagnosis for diabetes.
Methods for the incorporation of click reaction partners into systems in and ex vivo contribute to the scope of possible bioconjugation reactions. The development of unnatural amino acid incorporation by ribosomes has allowed for the incorporation of click reaction partners as unnatural side groups on these unnatural amino acids. For example, azidohomoalanine (AHA) is a methionine analog with an azide side group. This azide side group allows cycloalkynes to react to proteins that incorporate this "AHA" unnatural amino acid. In another example, "CpK" is a lysine analog. CpK has a side group including a cyclopropane alpha to an amide bond that serves as a reaction partner to tetrazine in an inverse diels-alder reaction.
==== Anti-Scl-70/anti-topoisomerase I ==== Anti-Scl-70 antibodies are linked to scleroderma. The sensitivity of the antibodies for scleroderma is approximately 34%, but is higher for cases with diffuse cutaneous involvement (40%), and lower for limited cutaneous involvement (10%). The specificity of the antibodies is 98% and 99.6% in other rheumatic diseases and normal individuals, respectively. In addition to scleroderma, these antibodies are found in approximately 5% of individuals with SLE. The antigenic target of anti-Scl-70 antibodies is topoisomerase I.
While the federal constitution assigns local authorities to the exclusive jurisdiction of state governments, in practice, the federal Ministry of Housing and Local Government oversees the regulation of local laws and policies. Mayors (or presidents for municipal and district councils) and councillors are appointed by the respective state governments, or in the case of the federal territories, by the federal government. Federal laws assign land matters, including the delineation of districts, to the purview of state governments. Except Perlis and the federal territories, each state is divided into districts, which are further subdivided into mukims. In Sabah and Sarawak, districts are grouped into divisions. In contrast to local governments that manage municipal administration and infrastructure development, districts are solely utilised for land taxation. The 13 states are based on historical Malay kingdoms, and 9 of the 11 Peninsular states, known as the Malay states, retain their royal families. The King is elected by and from the nine rulers to serve a five-year term. This King appoints governors serving a four-year term for the states without monarchies, after consultations with the chief minister of that state. Each state has its written constitution. Sabah and Sarawak have considerably more autonomy than the other states, most notably having separate immigration policies and controls, and unique residency status.
Sources: en.wikipedia.org
It is usually detected by LC-MS or HPLC-UV against a reference standard. In biological matrices, metabolite targeting can improve detection. No universal immunoassay is widely available.
The compound is generally handled as light-sensitive and stored cold and dry. Stability in solution depends on solvent, concentration, and storage time. Specific degradation rates are not fully standardized.
Limited water solubility affects formulation for cell and animal studies. Organic co-solvents are often used to dissolve it. Precipitation can confound assay results if not controlled.
It is a synthetic REV-ERB agonist used mainly in preclinical research. It is not an approved medicine for human use.