reference standard is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Updated 2026-03-15. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Typical for research-grade material |
| Solubility | Soluble in DMSO and ethanol; low aqueous solubility | Organic stock solutions are common |
| Typical storage temperature | -20 °C or lower | Protect from light and moisture |
| Common analytical method | LC-MS/MS | Used for detection and confirmation |
| Common synonyms | SR9009; Stenabolic | Stenabolic is an informal name |
Regulatory agencies have not approved SR9009 for human therapeutic use. It is typically sold as a research chemical with labels stating that it is not for human consumption. The World Anti-Doping Agency prohibits the substance in sport, generally under the category of non-approved substances. Customs and national laws may restrict importation, sale, or possession. Product quality and legal status can vary by country and vendor, and therapeutic claims are not permitted in regulated advertising because the compound lacks approval.
Several misconceptions surround SR9009. It is often described as a SARM, a steroid, or an exercise pill, but its known target is the REV-ERB receptor family. Rodent studies have examined exercise capacity and metabolic markers, yet human outcomes remain unproven. Oral bioavailability appears low in animals, and human pharmacokinetics are not well characterized. Online products may contain impurities or different compounds, so identity and purity testing are important for research use.
Analytical chemists detect SR9009 with liquid chromatography-tandem mass spectrometry, commonly abbreviated LC-MS/MS. Sample preparation may involve protein precipitation, liquid-liquid extraction, or solid-phase extraction before analysis. Laboratories can target the parent compound or its metabolites, depending on the matrix and the purpose of testing. Anti-doping methods require sensitive and specific assays because concentrations in biological samples can be low. Reference standards and validated methods are essential for reliable identification and quantification.
Detection of SR9009 in biological samples usually relies on liquid chromatography coupled to tandem mass spectrometry. This approach separates the compound from matrix components and identifies it by mass transitions. Because SR9009 can undergo metabolism, laboratories often look for both parent drug and specific metabolites. Sample preparation may involve protein precipitation or solid-phase extraction. Method validation examines sensitivity, carryover, and interference from related substances, and reference standards are required for accurate calibration.
Storage recommendations for SR9009 reference material typically specify a freezer at -20 °C or lower, with protection from moisture and light. Repeated freeze-thaw cycles can degrade small molecules and introduce variability. Stock solutions in dimethyl sulfoxide are often aliquoted to avoid repeated handling. Stability studies may examine degradation under heat, humidity, and light exposure. The compound's thiophene and nitro groups can participate in reactions that alter analytical signals over time, so such changes affect quantitative results.
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.
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.
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.
== The Bakery restaurant == Operating from 1963 to 1989, Szathmary's Chicago restaurant, The Bakery, served what Szathmary referred to as "continental dishes with American undertones". The inclusion of "exotic" European dishes expanded the fine dining in Chicago and made The Bakery a popular destination. The individual beef Wellington was particularly famous, and heavily cited on Chicago diners' must-try lists. Within its first year of operation, more than 200 articles were written about The Bakery. The restaurant attracted guests internationally, and Szathmary hosted parties for Hugh Hefner, Frank Zappa, and conductor Arthur Fiedler.
=== SNPs === Among the different genetic variants identified so far, several single nucleotide variants have been associated with diseases. The vast majority of single nucleotide variants in LNPEP are intronic variants that are part of an extended haplotype that functions as a transcriptional enhancer of the adjacent gene ERAP2 but does not regulate LNPEP expression. In fact, compared to its M1- aminopeptidase family members ERAP1 and ERAP2, LNPEP shows low tolerance to protein-truncating genetic variation and contains few loss-of-function variants in its gene.
In molecular biology, the copper type II ascorbate-dependent monooxygenases are a class of enzymes that require copper as a cofactor and which use ascorbate as an electron donor. This family contains two related enzymes, dopamine beta-monooxygenase EC 1.14.17.1 and peptidylglycine alpha-amidating monooxygenase EC 1.14.17.3. There are a few regions of sequence similarities between these two enzymes, two of these regions contain clusters of conserved histidine residues which are most probably involved in binding copper.
=== DoorDash lawsuit (2015) === On November 6, 2015, In-N-Out filed a lawsuit against food delivery startup DoorDash, claiming trademark infringement. Two months later, the lawsuit was settled out of court in a confidential settlement. DoorDash no longer delivers food from In-N-Out Burger.
Meanwhile, the Gough Whitlam government had passed the first Racial Discrimination Act 1975 that created a right of equal treatment based on race at work, the Sex Discrimination Act 1984 under Hawke prohibited discrimination on the grounds of sex, and together with the rights in the Disability Discrimination Act 1992, and the Age Discrimination Act 2004, complaints could be made to the Australian Human Rights Commission as well as courts for violation of anti-discrimination norms. Also under the Hawke-Keating government, the Superannuation Industry (Supervision) Act 1993 passed to ensure at least equal employee or beneficiary election rights on superannuation boards that provide workplace pensions.
Sources: en.wikipedia.org
Subsequent transfusions were successful with patients of James Young Simpson, after whom the Simpson Memorial Maternity Pavilion in Edinburgh was named. Various isolated reports of successful transfusions emerged towards the end of the 19th century. The largest series of early successful transfusions took place at the Edinburgh Royal Infirmary between 1885 and 1892. Edinburgh later became the home of the first blood donation and blood transfusion services.
==== Australia ==== Following the listing of the combination on the Pharmaceutical Benefits Scheme in 2022, the cost for people aged twelve years of age or older with cystic fibrosis who have at least one F508del mutation in the cystic fibrosis transmembrane conductance regulator gene is $30.00 per month, or $7.30 for concession card holders.
While the Commission has a monopoly on initiating legislation, the European Parliament and the Council of the European Union have powers of amendment and veto during the legislative process. According to the Treaty on European Union articles 9 and 10, the EU observes "the principle of equality of its citizens" and is meant to be founded on "representative democracy". In practice, equality and democracy are still in development because the elected representatives in the Parliament cannot initiate legislation against the commission's wishes, citizens of smallest countries have greater voting weight in Parliament than citizens of the largest countries, and "qualified majorities" or consensus of the council are required to legislate. This "democratic deficit" has encouraged numerous proposals for reform, and is usually perceived as a hangover from earlier days of integration led by member states. Over time, the Parliament gradually assumed more voice: from being an unelected assembly, to its first direct elections in 1979, to having increasingly more rights in the legislative process. Citizens' rights are therefore limited compared to the democratic polities within all European member states: under TEU article 11, citizens and associations have the right to publicise their views and the right to submit an initiative that must be considered by the Commission if it has received at least one million signatures. TFEU article 227 contains a further right for citizens to petition the Parliament on issues which affect them.
=== First measures === Right after taking office on 1 January 2023, Lula and his ministers took several measures to revert Bolsonaro policies and/or create policies announced during the election campaign and the transition of power. This processs, known as "desbolsonarização" (de-'Bolsonarization') or "revogaço" (mass repeal of decrees) by some ministers and party members included a series of federal decrees revoking the previous government's measures involving weapons, environment policies and top officials' data secrecy. Some of the decrees included temporarily suspending new authorizations for shooting clubs, revoking Bolsonaro government policies that allowed "artisan mining" in the Amazon rainforest area and indigenous lands (which were seen as an incentive to illegal miners). and the creation of the "Secretary of Digital Policies", which was to be established under the Secretary of Social Communications with the stated objective of "combatting the spread of disinformation, fake news and hate speech on the internet". On the same week, Environment and Climate Change Minister Marina Silva claimed that another "revogaço" was yet to come. Mostly related to the teto de gastos (debt ceiling) fiscal policy, which was seen as impractical by government officials. This policy was later replaced with another debt limit law following its approval in the Federal Congress.
Sources: en.wikipedia.org
In 1972, French physicist Francis Perrin discovered fifteen ancient and no longer active natural nuclear fission reactors in three separate ore deposits at the Oklo mine in Gabon, Africa, collectively known as the Oklo Fossil Reactors. The ore deposit is 1.7 billion years old; then, uranium-235 constituted about 3% of uranium on Earth. This is high enough to permit a sustained chain reaction, if other supporting conditions exist. The capacity of the surrounding sediment to contain the health-threatening nuclear waste products has been cited by the U.S. federal government as supporting evidence for the feasibility to store spent nuclear fuel at the Yucca Mountain nuclear waste repository.
==== Engineered bacteria-based platform ==== Bacteria have long been used in cancer treatment. Bifidobacterium and Clostridium selectively colonize tumors and reduce their size. Recently synthetic biologists reprogrammed bacteria to sense and respond to a particular cancer state. Most often bacteria are used to deliver a therapeutic molecule directly to the tumor to minimize off-target effects. To target the tumor cells, peptides that can specifically recognize a tumor were expressed on the surfaces of bacteria. Peptides used include an affibody molecule that specifically targets human epidermal growth factor receptor 2 and a synthetic adhesin. The other way is to allow bacteria to sense the tumor microenvironment, for example hypoxia, by building an AND logic gate into bacteria. Then the bacteria only release target therapeutic molecules to the tumor through either lysis or the bacterial secretion system. Lysis has the advantage that it can stimulate the immune system and control growth. Multiple types of secretion systems can be used and other strategies as well. The system is inducible by external signals. Inducers include chemicals, electromagnetic or light waves. Multiple species and strains are applied in these therapeutics. Most commonly used bacteria are Salmonella typhimurium, Escherichia coli, Bifidobacteria, Streptococcus, Lactobacillus, Listeria and Bacillus subtilis. Each of these species have their own property and are unique to cancer therapy in terms of tissue colonization, interaction with immune system and ease of application.
The geographical boundary of this unusual marriage pattern is now known as the Hajnal line; also worked on demography for United Nations, and for the Office of Population Research, Princeton University; was member of the International Statistical Institute and was elected FBA. Charlotte Haldane (27 April 1894 – 16 March 1969) was a British writer known as a feminist but also for anti-feminism in her 1927 book, Motherhood and its Enemies. In 1937 she worked as editor of the anti-fascist magazine Woman Today. and during the Spanish Civil War she took part in fund-raising activities on behalf of the International Brigades.In 1941 she went to Moscow to report on Soviet defense against the Nazis. Keith Kahn-Harris author, sociologist and music critic; honorary research fellow and senior lecturer at Birkbeck College and an associate fellow of the Institute for Jewish Policy Research and a lecturer at Leo Baeck College; has published academic and non-academic articles on Judaism, music scenes, heavy metal music, transgression, Israel, communities, dialogue, religion, ethnicity, political discourse, and denial; also writes for Medium, The Guardian, The Independent, Times of Israel, Haaretz, The Herald (Scotland), New Statesman, Times Higher Education (THE), The i Paper, openDemocracy; from 2001 to 2002 was "Jerusalem Fellow" at the Mandel School for Advanced Educational Leadership in Jerusalem.
Sources: en.wikipedia.org
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.
Liquid chromatography with tandem mass spectrometry is widely used to detect and confirm SR9009 in laboratory samples. The technique offers high sensitivity and can distinguish the target compound from related substances. Nuclear magnetic resonance and ultraviolet detection may support identity and purity checks.
Online products labeled as SR9009 may vary in identity, purity, and actual content. Independent testing helps confirm that a sample matches its label and does not contain unexpected contaminants. This is important for reproducible research and for interpreting experimental results.
No. It is an investigational compound without approved therapeutic indications. It is sold for research purposes only in many jurisdictions.