If you have been reading about storage stability and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Last reviewed on 2026-02-08. Where a claim depends on a specific study, the study is described rather than over-claimed.
Regulatory and sporting contexts treat SR9009 as a prohibited substance in many elite competitions. Its presence on banned lists reflects concerns about performance enhancement and unknown long-term safety. Analytical chemists have developed methods to detect the parent compound and its metabolites in urine and blood. Literature discussions distinguish between in vitro potency, animal pharmacology, and anecdotal human reports. The latter are difficult to verify because products sold online may lack purity or contain different compounds.
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, lipid metabolism, and inflammatory gene expression. In cell and animal experiments, SR9009 alters transcription of clock-controlled genes and metabolic pathways. The compound is not a hormone and does not resemble classical steroid structures. Its activity depends on binding to the ligand-binding domain of REV-ERB, where it can modify corepressor recruitment.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic REV-ERB agonist | Binds REV-ERBα and REV-ERBβ in preclinical models |
| Molecular formula | C20H24ClN3O4S | Reported for the parent compound |
| CAS Registry Number | 1379686-30-2 | Common identifier in chemical databases |
| Appearance | Off-white to pale yellow solid | Typical research chemical solid |
| Solubility | Soluble in DMSO and ethanol; low in water | Class: small organic molecule |
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.
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.
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 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.
The addition of milk chills the beverage during the crucial brewing phase, if brewing in a cup rather than using a pot, meaning the delicate flavour of a good tea cannot be fully appreciated. By adding the milk afterwards, it is easier to dissolve sugar in the tea and to ensure the desired amount of milk is added, as the colour of the tea can be observed. Historically, the order of steps was taken as an indication of class: only those wealthy enough to afford good-quality porcelain would be confident of its being able to cope with being exposed to boiling water unadulterated with milk. Higher temperature difference means faster heat transfer, so the earlier milk is added, the slower the drink cools. A 2007 study published in the European Heart Journal found certain beneficial effects of tea may be lost through the addition of milk.
== Safety == Lime sulfur reacts with strong acids (including stomach acid) to produce highly toxic hydrogen sulfide (rotten egg gas) and usually has a distinct "rotten egg" odor. Lime sulfur is not flammable, but it can release highly irritating sulfur dioxide gas in a fire. Safety goggles and impervious gloves should be worn when handling lime sulfur. Lime sulfur solutions are strongly alkaline (typical commercial concentrates have a pH over 11.5 because of the presence of dissolved sulfides and hydroxide anions) and are harmful to living organisms and can cause blindness if splashed in the eyes. The corrosive nature of lime sulfur is due to the reduced sulfur species it contains, in particular sulfides responsible for stress corrosion cracking and the thiosulfates that cause pitting corrosion. Localized corrosion by the reduced sulfur species can be significant; even the mere presence of elemental sulfur in contact with metals is enough to corrode them considerably, including so-called stainless steels.
The first step in purine biosynthesis is a condensation reaction, performed by glutamine-PRPP amidotransferase. This enzyme transfers the amino group from glutamine to PRPP, forming 5-phosphoribosylamine. The following step requires the activation of glycine by the addition of a phosphate group from ATP. GAR synthetase performs the condensation of activated glycine onto PRPP, forming glycineamide ribonucleotide (GAR). GAR transformylase adds a formyl group onto the amino group of GAR, forming formylglycinamide ribonucleotide (FGAR). FGAR amidotransferase catalyzes the addition of a nitrogen group to FGAR, forming formylglycinamidine ribonucleotide (FGAM). FGAM cyclase catalyzes ring closure, which involves removal of a water molecule, forming the 5-membered imidazole ring 5-aminoimidazole ribonucleotide (AIR). N5-CAIR synthetase transfers a carboxyl group, forming the intermediate N5-carboxyaminoimidazole ribonucleotide (N5-CAIR). N5-CAIR mutase rearranges the carboxyl functional group and transfers it onto the imidazole ring, forming carboxyamino- imidazole ribonucleotide (CAIR). The two step mechanism of CAIR formation from AIR is mostly found in single celled organisms. Higher eukaryotes contain the enzyme AIR carboxylase, which transfers a carboxyl group directly to AIR imidazole ring, forming CAIR. SAICAR synthetase forms a peptide bond between aspartate and the added carboxyl group of the imidazole ring, forming N-succinyl-5-aminoimidazole-4-carboxamide ribonucleotide (SAICAR).
A shift in substrate utilization can be induced by conditions such as eating or fasting, and the oxidation of either glucose or fatty acids tends to suppress the use of the other substrate (a phenomenon known as the Randle cycle). The intake of macronutrients stimulates the secretion and release of insulin and other chemical messengers such as glucagon-like peptide 1 (GLP-1), which act to regulate glucose levels, insulin sensitivity, satiety, and fat balance in the body. In the postprandial period, insulin is produced by the pancreas and serves to activate carbohydrate metabolism and stimulate glucose disposal in order to meet metabolic demands and prevent glucotoxicity. When insulin is unable to efficiently stimulate glucose utilization, the body's tissues become resistant to its hypoglycemic effects, promoting the development of a state of insulin resistance over time. This can happen because of chronic exposure to hyperinsulinemia due to poor diet, sedentary lifestyle, obesity, and other potentially modifiable risk factors. The phenomenon is similar to leptin resistance and can potentially lead to many deleterious health effects stemming from chronically elevated insulin levels, such as excessive fat storage and de novo synthesis, hepatic and peripheral insulin resistance, nonalcoholic fatty liver disease (NAFLD), hypertension and dyslipidemia, and decreased resting energy expenditure (REE) caused by impaired diet-induced thermogenesis.
Sources: en.wikipedia.org
The figures provided in this section on epidemiology all refer to undernutrition even if the term malnutrition is used which, by definition, could also apply to too much nutrition. The Global Hunger Index (GHI) is a multidimensional statistical tool used to describe the state of countries' hunger situation. The GHI measures progress and failures in the global fight against hunger. The GHI is updated once a year. The data from the 2015 report shows that Hunger levels have dropped 27% since 2000. Fifty two countries remain at serious or alarming levels. In addition to the latest statistics on Hunger and Food Security, the GHI also features different special topics each year. The 2015 report include an article on conflict and food security.
== Rulers == List of dukes of Normandy List of counts and dukes of Apulia and Calabria List of counts of Aversa List of princes of Capua List of dukes of Gaeta List of princes of Taranto List of princes of Antioch List of officers of the Principality of Antioch Second House of Lusignan List of English monarchs List of Scottish monarchs List of Sicilian monarchs
=== Early corals === Reef-building organisms similar to modern corals first appeared in the Cambrian about 535 million years ago. Fossils are extremely rare until the Ordovician period, 100 million years later, when Heliolitida, rugose, and tabulate corals became widespread. Paleozoic corals often contained numerous endobiotic symbionts. Tabulate corals occur in limestones and calcareous shales of the Ordovician period, with a gap in the fossil record due to extinction events at the end of the Ordovician. Corals reappeared some millions of years later during the Silurian period, and tabulate corals often form low cushions or branching masses of calcite alongside rugose corals. Tabulate coral numbers began to decline during the middle of the Silurian period. Rugose or horn corals became dominant by the middle of the Silurian period, and during the Devonian, corals flourished with more than 200 genera. The rugose corals existed in solitary and colonial forms, and were also composed of calcite. Both rugose and tabulate corals became extinct in the Permian–Triassic extinction event 250 million years ago (along with 85% of marine species), and there is a gap of tens of millions of years until new forms of coral evolved in the Triassic.
Stringing is perhaps the most crucial of these effects, and is often seen on adhesive tapes. Stringing occurs when a separation of two surfaces is beginning and molecules at the interface bridge out across the gap, rather than cracking like the interface itself. The most significant consequence of this effect is the restraint of the crack. By providing the otherwise brittle interfacial bonds with some flexibility, the molecules that are stringing across the gap can stop the crack from propagating. Another way to understand this phenomenon is by comparing it to the stress concentration at the point of failure mentioned earlier. Since the stress is now spread out over some area, the stress at any given point has less of a chance of overwhelming the total adhesive force between the surfaces. If failure does occur at an interface containing a viscoelastic adhesive agent, and a crack does propagate, it happens by a gradual process called "fingering", rather than a rapid, brittle fracture. Stringing can apply to both the diffusive bonding regime and the chemical bonding regime. The strings of molecules bridging across the gap would either be the molecules that had earlier diffused across the interface or the viscoelastic adhesive, provided that there was a significant volume of it at the interface.
These reactions are enhanced by aqueous conditions with a second order rate constant of 0.25 M−1•s−1. Of particular interest is that it has been proven to be bioorthogonal to both oxime formation and copper-free click chemistry.
Sources: en.wikipedia.org
19 genes have been discovered that cause α-DG-related dystrophies, with a wide range of phenotypic effects observed, characterized by brain malformations along with muscular dystrophy. Walker-Warburg syndrome (WWS) is the most severe dystroglycanopathy phenotype, with the POMT1 gene as the first reported causative gene, although there have been 11 additional genes implicated in WWS. These genes include POMT2, FKRP, FKTN, ISPD, CTDC2, TMEM5, POMGnT1, B3GALnT2, GMPPB, B3GnT1, and SGK196, many of which have been identified as involved in other dystroglycanopathies. Patients display muscle weakness and cerebellar and ocular malformations, with a life expectancy of less than 1 year. In 2024, a high-throughput functional assay was developed to measure glycosylation levels and assess the functional impact of variants in the enzymes responsible for the glycosylation of α-DG. An additional dystroglycanopathy phenotype is Fukuyama congenital muscular dystrophy (FCMD) caused by a mutation in the Fukutin (FKTN) gene, which is the second most common type of muscular dystrophy in Japan after Duchenne muscular dystrophy. The founder mutation of FCMD is a 3- kilo base pair retrotransposon insertion in the noncoding region of FKTN, leading to muscle weakness, abnormal eye function, seizures, and intellectual disability. While the exact function of FKTN is unknown, FKTN mRNA is expressed in fetuses in the developing CNS, muscles, and eyes, and is likely necessary for normal development since complete inactivation leads to embryonic death at 7 days.
In 2022, Schmitt reiterated his position on the attorney general's role in innocence proceedings and attempted to dismiss hearings on Michael Politte's conviction for the 1998 murder of his mother in Washington County, after a Washington County prosecutor filed a motion for exoneration on the grounds that 2002 chromatography analysis from case had been "scientifically proven false" after a review by the Missouri State Highway Patrol. The case continued under his successor, Andrew Bailey.
=== Temporal lobe epilepsy === Epilepsy of the mesial temporal lobe is associated with HHV-6 infection. Within this region of the brain exists three structures: the amygdala, hippocampus, and parahippocampal gyrus. Mesial temporal lobe epilepsy (MTLE) is the most common form of chronic epilepsy and its underlying mechanism is not fully understood. Researchers consistently report having found HHV-6 DNA in tissues that were removed from patients with MTLE. Studies have demonstrated a tendency for HHV-6 to aggregate in the temporal lobe, with the highest concentrations in astrocytes of the hippocampus. However, one group of researchers ultimately concluded that HHV-6 may not be involved in MTLE related to mesial temporal sclerosis.
In his work with the late Hans Eysenck and subsequently with Con Stough on the role of basic information processing speed in human intelligence, he used ERP complexity measures to argue for a modification to the Hendrickson and Hendrickson error or "string theory" (so named as pins and string were used to make the measurements of EEG output) model of ability, to include a controlling role of attention. In related work on reaction time, he introduced a novel modification to the Jensen box, again controlling the role of attention in this task, and suggesting that under these conditions, intelligence is, as Arthur Jensen proposed, related to the rate of information processing defined in Fitts Law and using Claude Shannon's information metrics. At the University of Edinburgh he has investigated individual differences in intelligence, memory, and the genetic and environmental influences on social behaviours, such as coalition affiliation, politics, and altruism. Working with Ian Deary, Paul Irwing, and Geoff Derr, he reported evidence for substantial gender differences in intelligence in the form of much larger variance amongst males than amongst females, with more boys and men scoring in both the extreme high range, and in the extreme low range.
Sources: en.wikipedia.org
SR9009 is a synthetic small molecule studied as an agonist of the REV-ERB nuclear receptors. It is not an approved medicine, and its effects in humans are not well characterized.
No. It is a synthetic ligand that binds nuclear receptors, not a steroid or peptide hormone. Its activity depends on receptor binding rather than endocrine secretion.
Clinical evidence is limited. Most published data come from cell and animal experiments. Human safety and efficacy remain uncertain.
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.