This is a working overview of storage stability, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2026-03-30 and is reviewed periodically as new material appears.
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.
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.
Regulatory status varies by country and intended use. Major drug agencies have not granted marketing authorization for SR9009 as a medicine, and it is not listed as a controlled substance in many jurisdictions. It is often sold as a research chemical, a category that may fall outside pharmaceutical manufacturing rules. Buyers should verify local laws and supplier documentation, including certificates of analysis. The lack of standardized quality controls raises concerns about identity, purity, and actual content in products marketed online.
In laboratory settings, SR9009 is commonly identified by its molecular structure and its interaction with REV-ERB receptors. Vendors may list it under synonyms such as Stenabolic or REV-ERB agonist, but those names do not define purity or identity. Analytical confirmation typically uses high-performance liquid chromatography with ultraviolet detection or liquid chromatography–mass spectrometry. A reference standard is needed to compare retention time and mass spectrum, because the compound can be confused with related research chemicals.
| 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 |
Regulatory treatment of SR9009 varies by country and context. It is not approved as a therapeutic drug by agencies such as the United States Food and Drug Administration or the European Medicines Agency. Sports authorities list it as a prohibited substance; the World Anti-Doping Agency classifies it among hormone and metabolic modulators. Legal status for personal possession or sale differs across jurisdictions, and some countries may restrict it under analog or research chemical laws. Buyers who seek verified material often rely on independent laboratory testing because online product labels may not match contents.
Laboratory samples of SR9009 are typically handled as research chemicals rather than pharmaceuticals. Suppliers usually state that the material is for research use only and not for human or veterinary administration. Storage recommendations generally call for a freezer at approximately −20 °C, protection from light, and a desiccated environment. The solid is often described as a white to off-white powder. Solubility is commonly reported in organic solvents such as dimethyl sulfoxide and ethanol, with low solubility in water.
Analytical identification and purity assessment often use high-performance liquid chromatography with ultraviolet detection or mass spectrometry. Liquid chromatography–tandem mass spectrometry is used to detect and quantify SR9009 in biological matrices, including urine and blood, for anti-doping or pharmacokinetic studies. Nuclear magnetic resonance spectroscopy can confirm molecular structure. Stability depends on form and storage: the solid is generally more stable than solutions, and repeated freeze–thaw cycles may degrade samples. Purity is typically reported as a percentage from a certificate of analysis.
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.
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.
=== Regulatory approval === Lurasidone was approved in the United States for the treatment of schizophrenia in October 2010 and for the treatment of depressive episodes associated with bipolar I disorder in June 2013. In 2015, lurasidone was studied for major depressive disorder with mixed features in a randomized trial and had a positive result, however it did not receive an FDA indication for it. In 2017, the FDA approved lurasidone for schizophrenia in adolescents age 13-17. In 2018, lurasidone was approved for bipolar depression in children and adolescents age 10-17. It received regulatory approval in the United Kingdom in September 2014. In October 2014, NHS Scotland advised use of lurasidone for schizophrenic adults who have not seen improvements with previous antipsychotics due to problems that arise from weight gain or changes in metabolic pathways when taking other medications. The Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency (EMA) issued a positive opinion for it in January 2014, and it was approved for medical use by the EMA in March 2014. It was launched in Canada for the treatment of schizophrenia in September 2012, Health Canada giving their Summary Basis of Decision (SBD) as favourable on 15 October 2012. The European Commission has granted a marketing authorization for once-daily oral lurasidone for the treatment of schizophrenia in adults. It is approved for use in the EU. Generic versions of lurasidone were approved for use in the United States in January 2019 and became available in 2023.
=== 21 May === President Zelenskyy appeared to confirm the fall of Bakhmut to Russia, saying in an interview to AFP that "For today, Bakhmut is only in our hearts" and that "nothing" was left of the city. However, he and his office later clarified that he had not said that the city had fallen. The Ukrainian Defence Ministry said its forces were holding on to a sector of the city while partly encircling Bakhmut itself. A Russian-installed official in occupied Zaporizhzhia Oblast said that the Ukrainian military had attacked the port of Berdiansk with seven missiles, including four British-supplied Storm Shadows. He said six of the missiles had been intercepted and one had fallen on the edge of the city but had not caused any casualties. The Ukrainian military later confirmed that they had struck a Russian headquarters in the city. President Biden confirmed a new military aid package worth $375 million for Ukraine, saying the United States would provide ammunition, artillery, armored vehicles and training. He also said that he received reassurances from President Zelenskyy that any F-16s supplied to Ukraine will not be used for incursions on internationally recognized Russian territory itself. An administrative building in the village of Golovchino in Russia's Belgorod Oblast caught fire. Russian officials blamed the fire on a "quadcopter". Japan announced the delivery of one hundred military vehicles and thirty thousand ration kits to Ukraine.
Autolytic debridement is the use of moist dressings to promote autolysis with the body's own enzymes and white blood cells. This is a slow process, but mostly painless, and is most effective in individuals with a properly functioning immune system. Biological debridement, or maggot debridement therapy, is the use of medical maggots to feed on necrotic tissue and therefore clean the wound of excess bacteria. Although this fell out of favor for many years, in January 2004, the FDA approved maggots as a live medical device. Chemical debridement, or enzymatic debridement, is the use of prescribed enzymes that promote the removal of necrotic tissue. Mechanical debridement is the use of debriding dressings, whirlpool or ultrasound for slough in a stable wound. Surgical debridement, or sharp debridement, is the fastest method, as it allows a surgeon to quickly remove dead tissue.
=== History === Nitro cold brew was first offered at third wave coffee shops in the early 2010s, but the exact origin is disputed. It may have originated in 2013 at the craft coffee houses Cuvee Coffee in Austin, Texas, and Stumptown in Portland, Oregon. The draft coffee at the Queens Kickshaw in New York in 2011 may be a predecessor. Cuvee Coffee first offered nitro cold brew, on tap, at the Slow Food Quiz Bowl in Austin, Texas, on August 14, 2012. The Ball Corporation issued a press release citing Cuvee as the first company to can cold brew in their widget cans, and BevNet awarded Cuvee the Best Packaging Innovation, calling them "the first cold brew brand to market a nitrogenated offering." Stumptown and Cuvee began offering canned beverages with a nitrogen-filled capsule to pressurize the can by 2015. Starbucks introduced the beverage at 500 stores in the summer of 2016, preceded in the Los Angeles market by The Coffee Bean & Tea Leaf. By 2020, Starbucks offered the beverage at more than half of its locations across the United States, making it a staple menu item. Nitro cold brew is available from wholesalers in some markets in kegs. RISE Brewing Co. says it can fill up to 1,500 kegs a day of nitro cold brew coffee.
== Full list of explicitly revoked executive orders == This is a list of only the executive orders explicitly revoked under section two of Initial Rescissions of Harmful Executive Orders and Actions. Additionally, it does not include the 10 presidential memoranda also rescinded by the order, which were dated March 13, 2023, and January 3, 6, and 14, 2025.
Sources: en.wikipedia.org
=== Nonspecific pain === Patients with uncomplicated back pain should be encouraged to remain active and to return to normal activities. The management goals when treating back pain are to achieve maximal reduction in pain intensity as rapidly as possible, to restore the individual's ability to function in everyday activities, to help the patient cope with residual pain, to assess for side effects of therapy and to facilitate the patient's passage through the legal and socioeconomic impediments to recovery. For many, the goal is to keep the pain at a manageable level to progress with rehabilitation, which then can lead to long-term pain relief. Also, for some people the goal is to use nonsurgical therapies to manage the pain and avoid major surgery, while for others surgery may represent the quickest path to pain relief. Not all treatments work for all conditions or for all individuals with the same condition, and many must try several treatment options to determine what works best for them. The present stage of the condition (acute or chronic) is also a determining factor in the choice of treatment. Only a minority of people with back pain (most estimates are 1–10%) require surgery.
The lone pair of electrons on the nitrogen atom is delocalized into the Carbonyl group, thus forming a partial double bond between nitrogen and carbon. In fact the O, C and N atoms have molecular orbitals occupied by delocalized electrons, forming a conjugated system. Consequently, the three bonds of the nitrogen in amides is not pyramidal (as in the amines) but planar. This planar restriction prevents rotations about the N linkage and thus has important consequences for the mechanical properties of bulk material of such molecules, and also for the configurational properties of macromolecules built by such bonds. The inability to rotate distinguishes amide groups from ester groups which allow rotation and results in a more flexible bulk material. The C-C(O)NR2 core of amides is planar. The C=O distance is shorter than the C-N distance by almost 10%. The structure of an amide can be described also as a resonance between two alternative structures: neutral (A) and zwitterionic (B).
=== Brand names === Oxazepam is marketed under many brand names worldwide, including: Alepam, Alepan, Anoxa, Anxiolit, Comedormir, durazepam, Medopam, Murelax, Nozepam, Noripam, Oksazepam, Opamox, Ox-Pam, Oxa-CT, Oxabenz, Oxamin, Oxapam, Oxapax, Oxascand, Oxaze, Oxazepam, Oxazépam, Oxazin, Oxepam, Praxiten, Purata, Selars, Serax, Serepax, Seresta, Séresta, Serenid, Serpax, Sobril, Delipam, Tazepam, Vaben, and Youfei. It is also marketed in combination with hyoscine as Novalona and in combination with alanine as Pausafrent T.
== External links == Clinical trial number NCT02793128 for "The OLYMPUS Study - Optimized DeLivery of Mitomycin for Primary UTUC Study (Olympus)" at ClinicalTrials.gov Clinical trial number NCT05243550 for "A Phase 3 Single-Arm Study of UGN-102 for Treatment of Low-Grade Intermediate-Risk Non-Muscle Invasive Bladder Cancer (ENVISION)" at ClinicalTrials.gov
=== India === Owing to rampant misuse, over-prescription, and unregulated over-the-counter access to antibiotics, the growth of AMR superbugs has proliferated in India. Pharmacies surveyed by the Karnataka government revealed that 80% of drugs were being sold without a prescription. A CDC survey revealed that half of inpatients were using "antibiotics from the 'Watch' category of WHO's AWaRe classification, which should be reserved for severe infections." In 2019, India reported 300,000 deaths because of infections relating to AMR, India also reports the most number of tuberculosis cases resistant to antibiotics.
Sources: en.wikipedia.org
== Further reading == Goel, Arun; Shrivastava, Prabhat (2010). "Post-burn scars and scar contractures". Indian Journal of Plastic Surgery. 43 (3). Georg Thieme Verlag KG: S63-71. doi:10.4103/0970-0358.70724. ISSN 0970-0358. PMC 3038392. PMID 21321660. Schneider, Jeffrey C.; Holavanahalli, Radha; Helm, Phala; Goldstein, Richard; Kowalske, Karen (2006). "Contractures in Burn Injury: Defining the Problem". Journal of Burn Care & Research. 27 (4). Oxford University Press (OUP): 508–514. doi:10.1097/01.bcr.0000225994.75744.9d. ISSN 1559-047X. PMID 16819356. S2CID 14982395.
=== Measuring vitamin status === Plasma concentrations of niacin and niacin metabolites are not useful markers of niacin status. Urinary excretion of the methylated metabolite N1-methyl-nicotinamide is considered reliable and sensitive. The measurement requires a 24-hour urine collection. For adults, a value of less than 5.8 μmol/day represent deficient niacin status and 5.8 to 17.5 μmol/day represents low. According to the World Health Organization, an alternative mean of expressing urinary N1-methyl-nicotinamide is as mg/g creatinine in a 24-hour urine collection, with deficient defined as <0.5, low 0.5-1.59, acceptable 1.6-4.29, and high >4.3 Niacin deficiency occurs before the signs and symptoms of pellagra appear. Erythrocyte nicotinamide adenine dinucleotide (NAD) concentrations potentially provide another sensitive indicator of niacin depletion, although definitions of deficient, low and adequate have not been established. Lastly, plasma tryptophan decreases on a low niacin diet because tryptophan converts to nicotinic acid mononucleotide (NaMN) and then to NAD by the kynurenine pathway. However, low tryptophan could also be caused by a diet low in this essential amino acid, so it is not specific to confirming vitamin status.
After the defeat of the November Uprising, thousands of former Polish combatants and other activists emigrated to Western Europe. This phenomenon, known as the Great Emigration, soon dominated Polish political and intellectual life. Together with the leaders of the independence movement, the Polish community abroad included the greatest Polish literary and artistic minds, including the Romantic poets Adam Mickiewicz, Juliusz Słowacki, Cyprian Norwid, and the composer Frédéric Chopin. In occupied and repressed Poland, some sought progress through nonviolent activism focused on education and economy, known as organic work; others, in cooperation with the emigrant circles, organized conspiracies and prepared for the next armed insurrection.
=== Other uses in arts, entertainment, and media === Link (film), a 1986 horror movie featuring a super-intelligent, murderous orangutan WBT-FM, a radio station in Charlotte, North Carolina, US, that used call sign WLNK 1997–2025
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.
Liquid chromatography–mass spectrometry is common for identity and purity checks. High-performance liquid chromatography with ultraviolet detection can also be used. Both methods require a suitable reference standard.