The short version of DMSO stock fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2025-09-17. Anything still debated is marked as such rather than presented as settled.
SR9009 is generally described as poorly soluble in water and more soluble in organic solvents such as dimethyl sulfoxide and ethanol. Stock solutions are commonly prepared in an organic solvent before dilution into an aqueous buffer or vehicle. Precipitation can occur if the organic fraction is reduced too quickly or if the final concentration exceeds the compound's solubility limit. Sonication or gentle warming may aid dissolution in some protocols, but excessive heat can promote degradation. Container material and pH can also influence observed solubility.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Visual inspection is not sufficient for identity. |
| Solubility | Soluble in DMSO and ethanol | Low solubility in water; stock solutions use organic solvent. |
| Storage | -20°C, desiccated, protected from light | Limits hydrolysis and photodegradation. |
| Analytical method | HPLC-UV/MS | Used for identity and purity assessment. |
| Synonyms | SR9009, Stenabolic | Naming varies by supplier. |
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.
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 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.
REV-ERB proteins help regulate daily cycles in gene expression, including genes tied to lipid and glucose metabolism. SR9009 binds these receptors and alters their activity in cell and animal experiments. Consequences observed in rodents include changes in skeletal muscle oxidative capacity, blood lipid levels, and exercise performance. The precise chain from receptor occupancy to whole-body effects is still an active area of study. Human responses cannot be assumed from rodent data.
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.
He successfully pitched the idea to Valve president Gabe Newell and others on the team by telling them: "Let’s take video games outside of the bunkers and the corridors and the hallways, and let’s have a whole world that feels real and very intense. And then when any event happens in this world, the impact will be much stronger." After this, City 17's architecture and atmosphere took inspiration from Soviet-era Sofia, Belgrade, and St. Petersburg—mainly Sofia—as well as Franz Kafka's writings and George Orwell's novel Nineteen Eighty-Four. Antonov collected images of the Gare d'Austerlitz train station in Paris to use as reference for the station the player starts the game from. Antonov made sure City 17 made sense not only in terms of level design, but as an actual living space, with "coherence and consistency" in street layouts and architecture "that shouldn’t be noticed by the players", but nonetheless is subconsciously felt by them. He also had to determine how the game's environments would interact with the advanced lighting technology offered by Valve's new Source game engine. Half-Life 2 writer Marc Laidlaw said that Antonov served as a bridge between "the daily practical ‘Yes, but how do I actually build it?’ needs of [the] level designers, and my vague, atmospheric, ‘It should sorta feel like’ suggestions"—as well as between the literary themes of the story and the design of City 17. Antonov later said that the game's development provided him a far more effective education on design than the ArtCenter College of Design did.
==== Trophic interactions ==== Assimilation of diet into tissue has a tissue-specific fractionation known as the trophic discrimination factor. Diet sources can be tracked through a food web via deuterium isotope profiles, though this is complicated by deuterium having two potential sources – water and food. Food more strongly impacts δD than does exchange with surrounding water, and that signal is seen across trophic levels. However, different organisms derive organic hydrogen in varying ratios of water to food: for example, in quail, 20-30% of organic hydrogen was from water and the remainder from food. The precise percentage of hydrogen from water, depended on tissue source and metabolic activity. In chironomids, 31-47% of biomass hydrogen derived from water, and in microbes as much as 100% of fatty acid hydrogen can be derived from water depending on substrate. In caterpillars, diet δD from organic matter correlates linearly with tissue δD. The same relationship does not appear to hold consistently for diet δD from water, however – water derived from either the caterpillar or its prey plant is more 2H-enriched than their organic material. Going up trophic levels from prey (plant) to predator (caterpillar) results in an isotopic enrichment. This same trend of enrichment is seen in many other animals - carnivores, omnivores, and herbivores - and seems to follow 15N relative abundances. Carnivores at the same trophic level tend to exhibit the same level of 2H enrichment.
=== The consolidation of the democratic system === The government of Felipe González understood that to consolidate the democratic regime in Spain it was necessary to put an end to its two main enemies: the "coup" and "terrorism". As for the former, a series of measures aimed at the "professionalization" of the Army and its subordination to civilian power were put in place with which the idea of an "autonomous" military power was completely discarded. The government still had to face a last coup attempt in June 1985 which was dismantled by the intelligence services and that was not reported to the public until more than ten years later. Following this case, the coup attempts disappeared from Spanish political life. As for the anti-terrorist policy, the first socialist governments maintained the reinsertion of imprisoned separatists ─ many of them belonging to the ETA political-military faction ─ who condemned ETA's violence and dissociated themselves from it, but in the face of under his mandate the "dirty war" against ETA led by the GAL was increased, a "group initially made up of members of the State security forces and later swelled by some Spanish and foreign mercenaries linked to the former Political-Social Brigade of Francoism". Until 1987, the attacks of the GAL caused 28 fatalities, the vast majority of them in the so-called "French sanctuary".
Sources: en.wikipedia.org
=== MSC based therapy === In certain studies, matrix-induces mesenchymal stem cell implantation showed earlier clinical improvements when compared to simple implantation of chondrocytes. The MSCs promoted cartilage regeneration in knees that had osteoarthritis and also reduced pain and disability.
(1) ATP + H2O + L-cystine [cystine - binding protein][side 1] = ADP + phosphate + L-cystine [side 2] + [cystine - binding protein][side 1] (2) ATP + H2O + D-cystine [cystine - binding protein][side 1] = ADP + phosphate + D-cystine [side 2] + [cystine - binding protein][side 1]
== Fascism == In the 1920 parliamentary elections nationalist candidates dominated thanks to the support of ex-combatants (Saraceni lost his Castrovillari constituency to a candidate supported by veterans). The Italian Socialist Party became the country's leading political force with as many as 156 deputies in Parliament, found itself divided between the maximalist current, advocating revolution, and the reformist current, in favor of dialogue. This division led first to the expulsion of the reformists, such as Turati and Bissolati (who later founded the Unitary Socialist Party), then to a split at the Livorno Congress in 1921, which led to the birth of the Communist Party of Italy (later the Italian Communist Party). That year the National Fascist Party was officially founded by Benito Mussolini, a former socialist expelled for his interventionist positions on the eve of World War I. The party evolved from the Fasci di Combattimento, founded in Milan in 1919 on an initially revolutionary/nationalist program. Fascist squads assaulted the armed wing of the movement, whose members were truncheoned and forced to drink castor oil (a purgative). The squadron was immediately financed by large industrial groups and agrarians, fearful of a possible Bolshevik revolution. This came in the wake of the so-called biennio rosso, and was often not countered by the police, who often sided with the fascists. In Calabria, too, the fascist squads went to work.
Sources: en.wikipedia.org
Liquid chromatography with mass spectrometry is a common approach. Ultraviolet detection and nuclear magnetic resonance can support identification when suitable standards are available.
The solid is generally kept cold, dry, and protected from light. Solutions are often frozen in single-use aliquots to reduce repeated freeze-thaw cycles.
It indicates a material sold for laboratory study, not for human use. The label does not guarantee pharmaceutical purity, sterility, or regulatory approval.
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.