A practical reference on purity testing: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2025-08-26 and is reviewed periodically as new material appears.
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.
Identity and purity of SR9009 samples are usually checked with chromatographic and spectrometric methods. High-performance liquid chromatography can separate the compound from related impurities, while mass spectrometry provides molecular mass confirmation. Nuclear magnetic resonance spectroscopy may be used for structural verification in research settings. No single method proves biological activity, and certificates of analysis should be reviewed alongside raw data. Independent testing is often needed because online products vary widely.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Synonyms | SR9009; Stenabolic | Stenabolic is an informal name |
| Common form | Crystalline powder | Supplied in milligram to gram quantities |
| Long-term storage | -20 °C, desiccated, protected from light | Reduces degradation |
| Detection technique | LC-MS/MS | Common in anti-doping and research analysis |
| Regulatory status | Prohibited in sport by WADA | Not approved for human therapeutic use |
Preclinical reports describe effects on exercise endurance, mitochondrial content, and lipid profiles in rodents, but these findings come from specific experimental conditions. Many studies use high doses or delivery methods that may not translate directly to human use. SR9009 has been reported to have low oral bioavailability and a short half-life, which complicates interpretation of oral dosing studies. It is not established as safe or effective for any indication. Literature discussions often separate its pharmacological mechanism from unverified claims made in fitness and supplement markets.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not an approved medicine and has no established human therapeutic use. The compound appears in scientific literature as a tool for probing circadian and metabolic regulation. Online sellers often label it as a research chemical, sometimes using the nickname Stenabolic. Its chemical identity is distinct from selective androgen receptor modulators, stimulants, and peroxisome proliferator-activated receptor delta agonists. Researchers use it mainly in cell and animal experiments.
At the molecular level, SR9009 binds REV-ERBα and REV-ERBβ and alters their repressive activity on target genes. These nuclear receptors help regulate the circadian clock, lipid synthesis, glucose metabolism, and inflammatory pathways. By changing transcription, the compound can shift the timing or magnitude of downstream metabolic processes in model systems. It does not act through androgen receptors or adenosine receptors, which distinguishes it from several substances sold for athletic performance. Whether the same transcriptional changes occur in humans at tolerable exposures remains an open question because controlled human studies are lacking.
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.
It was determined that long-term exposure to low levels of confirmed mycotoxins could pose chronic health risks. For all the above reasons, a trend away from feed ingredients and toward USDA-certified ingredients fit for human consumption has developed. In 1999, another fungal toxin triggered the recall of dry dog food made by Doane Pet Care at one of its plants, including Ol' Roy, Wal-Mart's brand, as well as 53 other brands. This time the toxin killed 25 dogs. A 2005 consumer alert was released for contaminated Diamond Pet Foods for dogs and cats. Over 100 canine deaths and at least one feline fatality have been linked to Diamond Pet Foods contaminated by potentially deadly aflatoxin, according to Cornell University veterinarians.
=== International Units === Another older unit of vitamin A activity is the international unit (IU). Like retinol equivalent, the international unit does not take into account carotenoid variable absorption and conversion to vitamin A by humans, as well as the more modern retinol activity equivalent. Food and supplement labels still generally use IU, but IU can be converted to the more useful retinol activity equivalent as follows:
== Range and habitat == The neon tetra is found in the western and northern Amazon basin in southeastern Colombia, eastern Peru, and western Brazil. It lives in waters with a temperature between 20 and 28 °C (68–82 °F) and pH 4–7.5. It has a preference for acidic blackwater streams, but also occurs in transparent clearwater streams. It is not found in the whitewater rivers. UN FAO considers P. innesi an introduced species in Singapore and the United States. FAO considers its introduction to Singapore to be ecologically and socioeconomically beneficial, but it is not established there.
On August 21, 2018, In-N-Out announced plans to open a location in the Willamette Valley in Keizer. This was the company's northernmost location. On November 30, 2017, the company announced plans to build a production facility and distribution center in Colorado Springs, ahead of an expansion into Colorado, which is scheduled to be completed in 2021. The first Colorado locations opened in Colorado Springs and Aurora on November 20, 2020. In-N-Out received approval for a new distribution center to open in Chino, California, in 2020, taking some of the load off the long-standing Baldwin Park distribution center. The center opened later that year. On November 24, 2020, In-N-Out signaled that it was in the early stages of opening a store in Idaho. The first store in the state opened in Meridian in December 2023. In-N-Out later expressed interest in opening additional stores in Boise and Nampa, as well as a second location in Meridian. The company pursued various locations around Portland, Oregon, which were rejected or stalled due to development issues; a location in Ridgefield, Washington, the first in Washington state, was announced in 2024. The location in Ridgefield, Washington opened on August 20, 2025, becoming the first in the state. A second Washington state location opened on April 23, 2026 in Vancouver, Washington. A location in Hillsboro, Oregon is expected to open in June 2026.
Five alpha-chain paralogs: LAMA1, LAMA2, LAMA3 (which has three splice forms), LAMA4, LAMA5 Four beta-chain paralogs: LAMB1, LAMB2, LAMB3, LAMB4 (note that no known laminin trimer incorporates LAMB4 and its function remains poorly understood). Three gamma-chain paralogs: LAMC1, LAMC2, LAMC3 Laminins were previously numbered as they were discovered, i.e., laminin-1, laminin-2, laminin-3, etc., but the nomenclature was changed to describe which chains are present in each isoform (laminin-111, laminin-211, etc.). In addition, many laminins had common names before either laminin nomenclature was in place.
Sources: en.wikipedia.org
flash point The lowest temperature at which the vapors above a volatile material will ignite if given an ignition source. At the flash point, the application of an open flame causes only a momentary "flash" rather than sustained combustion, for which the ambient temperature is still too low. The flash point should not be confused with the fire point, which occurs at a slightly higher temperature, nor with the kindling point, which is higher still.
=== August === 3 August – Researchers propose a theoretical method using quantum lattice gates to perform operations on bosonic quantum error-correcting codes within a single driving cycle, potentially making some operations more than 1,000 times faster than previous approaches and advancing efforts towards fault-tolerant quantum computing. 5 August – A study published in the JAMA Network Open shows that the fecal immunochemical test (FIT) has reduced deaths from colorectal cancer. 13 August – A meta-analysis of more than 480,000 participants finds that regular stair climbing is associated with a 39% lower risk of cardiovascular mortality and a 24% lower risk of death from any cause. 17 August A team of researchers combine synthetic DNA and a semiconductor to produce an ultra-low-power memory device – one that can carry out both the storage and processing of information within a single, unified location. This cutting-edge, bio-hybrid technology may in time contribute to far greater energy efficiency across AI systems and next-generation computers alike. Researchers at the Max Planck Institute for Marine Microbiology find that dozens of animal species carry enzymes capable of breaking down microbe-derived bioplastics known as PHAs, a long-standing talent once believed to belong exclusively to microorganisms.
== Applications == Isobaric labeling has been successfully used for many biological applications including protein identification and quantification, protein expression profiling of normal vs abnormal states, quantitative analysis of proteins for which no antibodies are available and identification and quantification of post-translationally modified proteins.
==== Pneumococcal vaccine ==== In 2010, as part of a 10-year pneumococcal vaccine Advance Market Commitment, the companies GlaxoSmithKline (GSK) and Pfizer were both allocated $225 million in AMC subsidies to provide 30 million doses annually at a maximum tail price of $3.50 per dose ($10.50 per child for three doses). In 2011, Médecins Sans Frontières (MSF) recommended that Gavi change the ways in which it procures vaccines. MSF argued that the Advance Market Commitment had transferred more money to GSK and Pfizer than the Gavi grants had transferred to low-cost suppliers for technology transfer and product development. MSF said that large pharmaceutical multinationals had been found to put very high markups on prices, and internationally certified vaccine could be made for about 40% less cost by smaller companies in India and China, despite patent-related obstacles. In January 2015, MSF also called upon GSK and Pfizer to cut the price of the pneumococcal vaccine to US$5 per child in developing countries, a price they estimated as competitive. They said that, as Pfizer had made $16 billion in revenue on pneumococcal vaccine in the last four years, a larger price cut would be affordable. In early 2016, they ran the "A fair shot" campaign to pressure GSK and Pfizer to drop prices. Pfizer said that they were already selling the vaccine at "far below" cost, while GSK said that the price enabled them to "just about" cover their costs, and "To discount it further would threaten our ability to supply it to these countries in the long-term".
An ultraviolet light can be used in the early phase of this disease for identification and to determine the effectiveness of treatment. Under a Wood's light, skin will change colour (fluoresce) when it is affected by certain bacteria, fungi, and changes to pigmentation of the skin. Past classifications of vitiligo have been somewhat inconsistent, but two forms are currently recognized.
Sources: en.wikipedia.org
These clotting mediators also provide a structural staging framework at the inflammatory tissue site in the form of a fibrin lattice – as would construction scaffolding at a construction site – for the purpose of aiding phagocytic debridement and wound repair later on. Some of the exuded tissue fluid is also funneled by lymphatics to the regional lymph nodes, flushing bacteria along to start the recognition and attack phase of the adaptive immune system.
=== Burger technique === The restaurant's burgers are created using chopped Angus beef chuck steak cut into thin slices. Fast food restaurants more typically use ground beef to form burger patties. It also markets its meat as "fresh, never frozen" and the beef is transported in 10-pound (4.5 kg) portions from distribution sites to restaurants each morning. There, employees divide the beef into loosely packed meatballs by hand. The burger meatball contains a bouillon-like flavoring and it is also seasoned with a proprietary blend that includes kosher salt, black pepper, and garlic, shortly before cooking. Meanwhile, the burger buns are made using a compression toaster and butter wheel so that they do not become too soggy once a patty is placed on them.
==== Added sodium ==== One of the main sources for sodium in the diet is processed foods. Sodium, mostly in the form of sodium chloride, i.e. salt, is added to prevent spoilage, add flavor and enhance the texture of these foods. Americans consume an average of 3436 milligrams of sodium per day, which is higher than the recommended limit of 2300 milligrams per day for healthy people, and more than twice the limit of 1500 milligrams per day for those at increased risk for heart disease.
=== Radical anion preparation === In the original ETD experiments anthracene (C14H10) was used to generate reactive radical anions through negative chemical ionization. Several polycyclic aromatic hydrocarbon molecules have been used in subsequent experiments, with fluoranthene currently the preferred reagent. Fluoranthene has only about 40% efficiency in electron transfer, however, so other molecules with low electron affinity are being sought.
Sources: en.wikipedia.org
Laboratories commonly use liquid chromatography coupled with mass spectrometry to detect SR9009. The method can identify the compound and estimate concentration in a sample. Detection limits depend on the matrix and instrument.
Research-grade purity indicates a supplier's measured percentage of the intended compound. It does not guarantee safety, sterility, or suitability for human consumption. Buyers should request a certificate of analysis with chromatograms and test methods.
Sports regulators prohibit SR9009 because it is a non-approved substance with potential performance-altering effects. Its presence can be detected in anti-doping testing. Athletes are responsible for substances found in their samples.
SR9009 is a synthetic compound investigated as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is used in preclinical research on circadian rhythm and metabolism. It is not an approved drug.