LC-MS/MS comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Last reviewed on 2026-07-18. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
The mechanism of action involves binding to REV-ERB receptors and recruiting corepressor complexes, which represses target gene transcription. This contrasts with many nuclear receptor agonists that activate transcription. Downstream effects may include changes in autophagy, mitochondrial biogenesis, and lipid handling, but the precise pathways remain an active area of study. Whether these molecular events translate into meaningful physiological effects in humans is unresolved. Most evidence comes from cultured cells and rodent models rather than human participants.
SR9009 is a synthetic small molecule developed as an agonist of the nuclear receptors REV-ERBα (NR1D1) and REV-ERBβ (NR1D2). These receptors help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, SR9009 alters transcription of genes involved in lipid metabolism, inflammation, and mitochondrial function. It is not an approved medicine, and its pharmacological profile in humans remains largely uncharacterized. The compound is frequently discussed in the context of circadian biology and metabolic research rather than clinical use.
| 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 |
Handling practices for SR9009 focus on minimizing degradation and contamination. The solid is generally stored desiccated at or below -20 °C, protected from light and moisture. Stock solutions are often prepared in dimethyl sulfoxide or ethanol, then aliquoted to avoid repeated freeze–thaw cycles. Aqueous solubility is low, so formulations for animal studies may require cosolvents or suspending agents. Personnel should follow institutional chemical safety procedures, because toxicological data for humans are incomplete.
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.
SR9009 is often grouped with compounds studied for circadian and metabolic regulation rather than with classical anabolic steroids. Its interactions with nuclear receptors differ from those of androgen receptor ligands, and its proposed mechanisms involve transcriptional control rather than direct hormone signaling. Some sources classify it as a metabolic modulator because of observed effects on energy utilization. The distinction matters for regulation and for interpreting research results across different compound classes.
SR9009 is a synthetic small molecule developed as a REV-ERB agonist. It binds to REV-ERBα and REV-ERBβ, nuclear receptors that help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, the compound alters lipid and glucose handling and influences skeletal muscle oxidative capacity. Its exact effects in humans remain largely uncharacterized because controlled clinical trials have not been reported. The molecule is frequently described in preclinical literature as a metabolic modulator.
In May–June 1897, Thomson investigated whether or not the rays could be deflected by an electric field. Previous experimenters had failed to observe this, but Thomson believed their experiments were flawed because their tubes contained too much gas. Thomson constructed a Crookes tube with a better vacuum. At the start of the tube was the cathode from which the rays projected. The rays were sharpened to a beam by two metal slits – the first of these slits doubled as the anode, the second was connected to the earth. The beam then passed between two parallel aluminium plates, which produced an electric field between them when they were connected to a battery. The end of the tube was a large sphere where the beam would impact on the glass, created a glowing patch. Thomson pasted a scale to the surface of this sphere to measure the deflection of the beam. Any electron beam would collide with some residual gas atoms within the Crookes tube, thereby ionizing them and producing electrons and ions in the tube (space charge); in previous experiments this space charge electrically screened the externally applied electric field. However, in Thomson's Crookes tube the density of residual atoms was so low that the space charge from the electrons and ions was insufficient to electrically screen the externally applied electric field, which permitted Thomson to successfully observe electrical deflection.
=== Detection === Modafinil is considered a stimulant doping agent and as such is prohibited by World Anti-Doping Agency in sports competitions. Modafinil enantiomers can be separately quantified in biological samples.
The team consisted of officials from the Department of Foreign Affairs and members of the Defence Forces, including Army Ranger Wing personnel. 24 April – Fifty Irish citizens were evacuated on French and Spanish aircraft from Khartoum in Sudan to safety in Djibouti. It was announced that Ireland had purchased two Airbus C295 maritime patrol aircraft capable of future airlift missions, while Airbus will supply an additional military transport aircraft to Ireland in 2025. 25 April Seventy-two Irish citizens and their families were rescued with the help of France and Spain from violence in Sudan to safety in Djibouti and Jordan. An Irish metal and polymer lunar soil experiment produced by the Dublin City University School of Chemical Sciences was lost when the Japanese Hakuto-R Mission 1 Moon landing spacecraft carrying the Rashid Lunar Rover built by the United Arab Emirates stopped communicating during the final moments of an automated Moon landing attempt in the Atlas Crater. 26 April – Sixteen more Irish citizens and their family members were rescued since the day before via Djibouti, Jordan, and Cyprus, from the fighting which broke out on 15 April in Sudan. More than 100 Irish people remained in the country. 30 April – After evacuating 209 Irish people and their families in the past week, the Emergency Civil Assistance Team was withdrawn from Sudan.
The solute will partition between the water and the stationary phase (KSW), the water and the micelles (KMW), and the micelles and the stationary phase (KSM). Armstrong and Nome derived an equation describing the partition coefficients in terms of the retention factor (formally capacity factor), k¢. In HPLC, the capacity factor represents the molar ratio of the solute in the stationary phase to the mobile phase. The capacity factor is easily measure based on retention times of the compound and any unretained compound. The equation rewritten by Guermouche et al. is presented here:
In 1896, the engineer Wolfram Fuchs, based on his experience with numerous X-ray examinations, recommended keeping the exposure time as short as possible, staying away from the tube, and covering the skin with Vaseline. In 1897, Chicago doctors William Fuchs and Otto Schmidt became the first users to have to pay compensation to a patient for radiation damage. In 1901, dentist William Herbert Rollins (1852-1929) called for using lead-glass goggles when working with X-rays, for the X-ray tube to be encased in lead, and for all areas of the body to be covered with lead aprons. He published over 200 articles on the potential dangers of X-rays, but his suggestions were long ignored. A year later, Rollins wrote in despair that his warnings about the dangers of X-rays were not being heeded by either the industry or his colleagues. By this time, Rollins had demonstrated that X-rays could kill laboratory animals and induce miscarriages in guinea pigs. Rollins' achievements were not recognized until later. Since then, he has gone down in the history of radiology as the "father of radiation protection". He became a member of the Radiological Society of North America and its first treasurer.
Sources: en.wikipedia.org
Microarrays can also be used for detecting autoantibodies, utilizing autoantigen arrays to screen against many antigens or potential antigens in parallel. Treatment development involves the development of antigen-specific therapies for autoimmunity, cancer and allergies; the identification of small molecule targets that could potentially be used as new drugs.
== Medical uses == Naltrexone/bupropion is indicated, as an adjunct to a reduced-calorie diet and increased physical activity, as anti-obesity medication for the management of weight in adults with an initial body mass index (BMI) of:
Once the ligand interacting with the target macromolecule is identified, drug candidates can be designed and optimized based on the structure-activity relationship. Nowadays, artificial intelligence is employed in drug design to predict drug-protein interactions, drug activity, the 3D configuration of proteins, etc.
=== Bibliography === Jamaluddin, Ahmad Badawi (2007). PENGGUNAAN UBATAN TRADISIONAL DI PASAR TAMU DAN PASAR BESAR DAERAH TAWAU, SABAH: SATU TINJAUAN [USE OF TRADITIONAL MEDICINE IN WEEKLY MARKET AND MAIN MARKET IN TAWAU DISTRICT, SABAH: A REVIEW] (PDF). Conservation Biology Program School of Science and Technology (Thesis) (in Malay). pp. 1–27. Archived (PDF) from the original on 2 June 2025. Retrieved 2 June 2025 – via Universiti Malaysia Kelantan. Kustiariyah (2007). "TERIPANG SEBAGAI SUMBER PANGAN DAN BIOAKTIF" [SEA CUCUMBER AS A FOOD AND BIOACTIVE SOURCE]. Indonesian Journal of Aquatic Product Technology [Buletin Teknologi Hasil Perikanan] (in Indonesian). X (1): 1–8. Archived from the original on 1 June 2025. Damaiyanti, Dian Widya (2015). "Karakterisasi Esktrak Air Teripang Emas (Stichopus hermanii)" [Characterization Of Water Extract Gold Sea Cucumber (Stichopus hermanii)]. Denta (Jurnal Kedokteran Gigi) (in Indonesian). 9 (1): 1–8. ISSN 1907-5987. Archived from the original on 2 June 2025. Text is licensed by DENTA (Journal Kedokteran Gigi) under CC BY-NC-SA 4.0 Vaitilingon, Devarajen; Smith, Stuart; Watson, Guy; Miller, Tim; Alattas, Syed; Ong Hock, Keat; Zainoddin, Jamari; Zaidnuddin, Ilias; Azhar, Hamzah (2016). "Sea cucumber hatchery seed production in Malaysia: From research and development, to pilot-scale production of the sandfish Holothuria scabra" (PDF). SPC Beche-de-mer Information Bulletin (36): 67–75. Archived from the original (PDF) on 16 May 2021 – via Sustainable Aquaculture Research & Development (Mauritius).
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.
It is a synthetic compound that acts as an agonist at REV-ERBα and REV-ERBβ. It is used mainly as a research chemical to study circadian and metabolic pathways. It is not approved for human therapeutic use.