A practical reference on certificate of analysis: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2025-09-01. Anything still debated is marked as such rather than presented as settled.
Regulatory treatment of SR9009 reflects its investigational status. The compound has no approved human therapeutic indication, and sports authorities prohibit its use. It appears on anti-doping lists as a non-approved substance or metabolic modulator, depending on the list version. Products sold online as research chemicals are not quality-controlled medicines, so their identity and purity can differ from the label. Such products may also contain unlisted compounds, which complicates both testing and safety assessment.
Scientific discussion of SR9009 often separates animal evidence from human anecdote. Rodent studies provide controlled data on endurance, metabolism, and gene expression, but they use specific strains, doses, and treatment durations. Human reports are mostly uncontrolled and cannot establish cause and effect. Open questions include oral bioavailability, tissue distribution, metabolic stability, and long-term effects. Review articles generally call for more rigorous pharmacokinetic and safety research before any clinical use could be considered.
Analytical methods for SR9009 typically rely on liquid chromatography coupled with tandem mass spectrometry. The technique can separate the parent compound from related substances and detect low concentrations in biological matrices. Urine and blood are common samples in anti-doping testing, while in vitro studies may use cell culture media. Rapid metabolism and low expected concentrations make method validation important for reliable identification. Exact metabolite patterns can vary by species and are not fully mapped.
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.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Not approved for human use | Investigational status in most countries |
| Sports status | Prohibited by WADA | Classified as non-approved or metabolic modulator |
| Common analytical method | LC-MS/MS | Used for trace detection in biological samples |
| Typical test matrices | Urine and blood | Sample choice depends on testing program |
| Human trial data | None published | Effects and safety are not established |
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.
Research interest in SR9009 grew from studies of circadian biology and metabolic disease. Preclinical reports describe effects on exercise capacity, muscle metabolism, and blood lipid levels in rodents, but these findings come from controlled laboratory settings. The compound has low oral bioavailability in animals, which limits systemic exposure after swallowing. Investigators often use injected routes in experiments to achieve measurable plasma concentrations. Human clinical data are sparse, no approved therapeutic product exists, and whether animal effects translate to humans remains an open question.
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.
==== Brazil ==== On 26 April 2021, the Brazilian health regulator Anvisa rejected the use of Sputnik V, alleging a lack of consistent and reliable data and the presence of replicating adenovirus in the vaccine. RDIF and Sputnik V's official Twitter account said the decision may be politically motivated, pointing to a report by the United States government stating that the Office of Global Affairs persuaded Brazil to reject the vaccine. Several Brazilian states in the North and Northeast regions had already signed contracts for the acquisition of more than 30 million doses. Anvisa attributed its decision to a number of issues with the samples provided by Gamaleya for accreditation:
In Thailand, soy sauce is called sii-íu (Thai: ซีอิ๊ว). Sii-íu kǎao (Thai: ซีอิ๊วขาว, 'white soy sauce') is used as regular soy sauce in Thai cuisine, while sii-íu dam (Thai: ซีอิ๊วดำ, 'black soy sauce') is used primarily for colour. Another darker-coloured variety, sii-íu wǎan (Thai: ซีอิ๊วหวาน, 'sweet soy sauce') is used for dipping sauces. Sɔ́ɔt prung rót (Thai: ซอสปรุงรส, 'seasoning sauce') is also commonly used in modern Thai cuisine.
Pentagon Papers, Chapter 2 Archived 2011-08-06 at the Wayback Machine Vietnam: The Impossible War Fall, Bernard B. Street Without Joy: The French Debacle In Indochina ANAPI's official website (National Association of Former POWs in Indochina) Hanoi upon the army's return in victory (bicycles demystified) Viet Nam Portal Photos about the First War of Indochina (French Defense Archives) (ECPAD) (in French)
Sources: en.wikipedia.org
=== 1 April === Ukraine reported shooting down two of three Shahed drones. A power substation in Zaporizhzhia Oblast was damaged by a drone strike. Ukrainian border guards intercepted a Russian sabotage group trying to enter Sumy Oblast. Valeriy Chaika, a Russian-appointed official in Starobilsk, Luhansk Oblast was killed after a bomb exploded in his car. The Security Service of Ukraine (SBU) arrested a resident of Kharkiv on suspicion of spying for Russia and a businessman from Berdiansk on suspicion of selling construction material for Russian fortifications. It also charged RT chief editor Margarita Simonyan in absentia with promoting genocide, spreading propaganda, justifying the Russian invasion and encouraging the violation of Ukraine's territorial integrity.
Entomologist Justin Schmidt created a sting pain index where the Tarantula hawk spider wasp is described as "Blinding, fierce, shockingly electric. A running hair dryer has just been dropped into your bubble bath". Dr Sam Robinson had himself stung by the Australian spider-hunting wasp and described the experience as "authoritative, gripping and shockingly powerful". Though both insects are related to the PMTXs producing spider wasps, there are no recorded cases of the experience of having Anoplius samariensis or Batozonellus maculifrons administer their PMTXs-containing venom to humans. The pain arises after the venom is introduced into the skin and enzymes have degraded the surrounding tissue. Several immune cells such as mast cells and basophils are then activated and release histamine to cause widening of the veins and the immune response that causes the pain and gives rise to increased warmth as well as the swelling and reddening of the skin that is characteristic for insect stings.
=== Epidermal-dermal signaling === Silicone-related products can reduce the growth factor production of fibroblasts in hypertrophic scars and keloids. However, the relevance is unclear as silicone products do not have direct contact with dermal fibroblasts but with the epidermis only. Possible relevance may be due to the initiation of a signaling cascade by the epidermis. Through the signaling cascade, the epidermis regulates dermal fibroblast extracellular matrix production. Delayed epithelialization, which raises the risk of hypertrophic scar formation, is less likely to happen. A negative static electric charge is formed by friction between the silicone gel sheet and the skin. The charge induces collagen realignment, aiding the elimination of the scar. Moreover, the negative electric field leads to the polarization of scar tissues and thus scar shrinkage.
Sources: en.wikipedia.org
For example, for decays of 132Cs, 98.13% are ε (electron capture) or β+ (positron) decays, and 1.87% are β− (electron) decays. The half-life of this isotope is 6.480 days, which corresponds to a total decay constant of 0.1070 d−1. Then the partial decay constants, as computed from the branching fractions, are 0.1050 d−1 for ε/β+ decays, and 2.001×10−3 d−1 for β− decays. Their respective partial half-lives are 6.603 d and 347 d. Isotopes with significant branching of decay modes include copper-64, arsenic-74, rhodium-102, indium-112, iodine-126 and holmium-164.
Moreover, its efficiency is competitive with computation in other symbolic programming languages. Fuzzy logic assigns a "degree of truth" between 0 and 1. It can therefore handle propositions that are vague and partially true. Non-monotonic logics, including logic programming with negation as failure, are designed to handle default reasoning. Other specialised versions of logic have been developed to describe many complex domains.
Ice-nine is a fictional material that appears in Kurt Vonnegut's 1963 novel Cat's Cradle. Ice-nine is described as a polymorph of ice which instead of melting at 0°C (32°F) melts at 45.8°C (114.4°F). When ice-nine comes into contact with liquid water below 45.8°C, it acts as a seed crystal and causes the solidification of the entire body of water, which quickly crystallizes as more ice-nine. As humans are 55-60% water, ice-nine kills nearly instantly when ingested or brought into contact with soft tissues exposed to the bloodstream, such as the eyes or lips. In the story, ice-nine is invented by Dr. Felix Hoenikker while working on the Manhattan Project in response to a suggestion from a Marine general, who complained about soldiers having to deal with mud on the battlefield. The project is abandoned when it becomes clear that any quantity of the substance would have the power to destroy all life on Earth. In the novel's climax, the Earth's oceans are accidentally frozen solid by ice-nine, prompting a doomsday scenario. Vonnegut encountered the idea of ice-nine while working at General Electric. He attributes the idea of ice-nine to his brother Bernard Vonnegut, who was researching the formation of ice crystals in the atmosphere. A later account of the events attributes the idea to the chemist Irving Langmuir, who devised the concept while helping H.G. Wells conceive ideas for stories. Vonnegut decided to adapt the idea into a story after Langmuir's death in 1957.
=== Internet shutdown === Several human rights organisations including Human Rights Watch (HRW) condemned the al-Burhan-led TMC for shutting down the internet in June 2019. A spokesperson, Shamseldin Kabbashi, stated that the internet would be shut down for a long time because it represented a threat to national security. The move was described by HRW as a "gross violation of human rights". International media saw this as a sign of dictatorship and condemned the act. Many see it as an attempt to hide what al-Burhan's allied militia, known as the Janjaweed, were doing in Khartoum to delay uploading evidence of the violations that took place on 3 June 2019 and in the days that followed.
Sources: en.wikipedia.org
No. It is an investigational compound without approved therapeutic indications. It is sold for research purposes only in many jurisdictions.
Sports authorities prohibit it because it is not approved for human use and has potential performance-enhancing effects. It appears on anti-doping lists under non-approved or metabolic modulator categories.
Detection usually uses liquid chromatography-tandem mass spectrometry. The method targets the parent compound or its metabolites in urine or blood.
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.