Everything below concerns Creatine. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-08-01. Numbers and descriptions here follow the published literature rather than marketing material.
Commercial creatine products appear in several forms, including monohydrate, hydrochloride, citrate, nitrate, and ethyl ester. Creatine monohydrate is the most studied form and serves as a reference material in comparative research. Different forms vary in solubility, pH, and water content, but they share creatine as the active moiety after dissolution. Claims that one form is uniformly superior remain debated, and study designs often differ in population, exercise protocol, and outcome measures. Purity and hydration state are central to interpreting product labels.
Creatine monohydrate is the hydrated form of creatine, a nitrogen-containing organic acid involved in cellular energy transfer. Its molecular formula is C4H11N3O3, and it consists of creatine plus one water molecule in the crystal lattice. The anhydrous base, creatine, has the formula C4H9N3O2. The compound appears as a white, odorless, crystalline powder and is classified as a guanidine derivative. It is distinct from creatinine, a breakdown product measured in clinical chemistry.
Commercial creatine monohydrate is produced mainly by chemical synthesis rather than extraction from animal tissue. Suppliers provide a certificate of analysis listing assay, water content, and impurity limits, and some products undergo third-party testing. Verification of identity can use infrared or Raman spectroscopy alongside chromatographic methods. Storage recommendations generally call for a cool, dry place and a tightly closed container to limit moisture uptake. Open questions include how packaging, flavoring agents, and long-term storage affect the stability of finished products.
Dry creatine monohydrate is generally stable when kept sealed and protected from heat and moisture. In solution, however, creatine undergoes a slow cyclization to creatinine, a related compound with no role in phosphocreatine storage. The rate of this conversion increases with temperature and is influenced by pH. Because creatinine is a common impurity in liquid or poorly stored products, analytical testing often measures both compounds. The crystalline monohydrate is less prone to degradation than aqueous preparations, though caking can occur if moisture enters the container.
Laboratory analysis of creatine monohydrate typically uses high-performance liquid chromatography to separate creatine from creatinine and other impurities. Detection may be ultraviolet, refractive index, or mass spectrometric, depending on the laboratory's equipment and the required sensitivity. Nuclear magnetic resonance spectroscopy can quantify the main component and identify related substances. Water content is measured by Karl Fischer titration, which is important because the monohydrate has a defined theoretical hydration level. Heavy metals, residual solvents, and microbial limits are also checked in quality control programs.
| Property | Value | Notes |
|---|---|---|
| Chemical formula (monohydrate) | C4H11N3O3 | Includes one water molecule per creatine unit. |
| Molecular weight | 149.15 g/mol | Calculated for the monohydrate; anhydrous creatine is 131.13 g/mol. |
| Appearance | White crystalline powder | Odorless; particle size can vary by manufacturing. |
| CAS Registry Number | 6020-87-7 | Identifies creatine monohydrate; creatine base is 57-00-1. |
| Common synonyms | Creatine hydrate; methylguanidoacetic acid monohydrate | Naming varies by registry and supplier. |
In aqueous solution, creatine monohydrate exists mainly as a zwitterion, carrying both a positive guanidinium charge and a negative carboxylate charge. This charge separation raises water solubility relative to many neutral organic solids and helps explain its behavior in analytical separations. The monohydrate can lose its water of crystallization under sustained heat or low humidity, converting toward anhydrous creatine. Such transitions matter for mass balance calculations because the hydrate contributes water mass that is not part of the active creatine molecule.
The term creatine monohydrate is often shortened to creatine in casual usage, though other creatine forms exist, including citrate, nitrate, and hydrochloride salts. These alternative forms differ in solubility, pH behavior, and the amount of creatine delivered per unit mass. Regulatory categories vary by country: some jurisdictions treat it as a food ingredient, while others place it under supplement or drug frameworks depending on claims and presentation. Standard reference texts list it as a naturally occurring nitrogenous organic acid rather than a vitamin or mineral.
Creatine monohydrate is a crystalline organic compound formed from creatine and water in a one-to-one ratio. It belongs to the guanidino family and contains a methylated guanidine group attached to an acetate-like chain. The solid is commonly described as a white, odorless powder with a mildly bitter taste. Its molecular formula is C4H11N3O3·H2O, and the hydrated form is the most widely traded grade. The compound occurs naturally in vertebrate muscle and brain tissue, where it participates in rapid energy buffering.
Several creatine forms are sold, including monohydrate, anhydrous, hydrochloride, nitrate, citrate, and blends. Once dissolved, these forms deliver creatine, but they differ in molar mass, solubility, counterions, and water content. Creatine monohydrate has the largest body of published human data among these forms. Questions remain about whether any alternative form offers meaningful advantages in absorption, tolerability, or tissue uptake under practical conditions. The hydrate form's lower creatine content by mass is a compositional fact, not a statement about effectiveness.
Creatine monohydrate is a crystalline compound formed when one molecule of creatine associates with one molecule of water in the solid lattice. Its molecular formula is C4H11N3O3, and its molar mass is about 149.15 grams per mole. The material appears as a white, odorless powder that dissolves sparingly in water at room temperature. The monohydrate designation distinguishes it from anhydrous creatine, which lacks the bound water and has a lower molar mass. This hydrate is the most common commercial form of creatine used in nutritional and research settings.
Stability studies examine how creatine monohydrate changes under controlled temperature and humidity. The solid is generally stable when kept dry, but moisture can promote hydrolysis to creatinine, especially in solution or at elevated temperatures. Color, odor, and assay values are monitored over time to detect degradation. Because degradation pathways depend on storage conditions, shelf-life claims should specify the tested packaging, temperature, and humidity. Open questions remain about the long-term behavior of different crystal habits and particle sizes.
Regulatory treatment of creatine monohydrate varies by country and intended use. In some jurisdictions it is sold as a dietary supplement, while in others it may be treated as a food ingredient or a pharmaceutical raw material. Pharmacopeial monographs, where available, define identification, assay limits, and impurity thresholds. Manufacturers often follow these monographs or internal specifications to ensure batch-to-batch consistency. Analytical method validation is important because different methods can yield different apparent purity values if sample preparation or detection conditions are not controlled.
=== Discontinued === Amibegron (SR-58611; SR-58611A) – β3-adrenergic receptor agonist [26] BTG-1640 (ABIO-08/01; ABIO-0801) – undefined mechanism of action [27] Darigabat (CVL-865; PF-06372865; PF-6372865) – GABAA receptor positive allosteric modulator [28] Imagabalin (PD-0332334; PD-332334; PF-00195889) – α2δ subunit-containing voltage-gated calcium channel ligand [29] Naluzotan (PRX-00023) – serotonin 5-HT1A receptor agonist and sigma σ1 receptor agonist [30] Ocinaplon (CL-273547) – GABAA receptor positive allosteric modulator and nonbenzodiazepine/pyrazolopyrimidine [31] Pagoclone (IP-456; Panex; RP-62955) – GABAA receptor positive allosteric modulator and nonbenzodiazepine/cyclopyrrolone [32] PF-572778 – undefined mechanism of action [33] Rufinamide (Banzel; CGP-33101; E-2080; Inovelon; RUF-331; SYN-111) – sodium channel blocker and other actions [34] Talaglumetad (LY-544344) – metabotropic glutamate mGlu2 and mGlu3 receptor agonist (eglumetad prodrug) [35] Tedatioxetine (Lu-AA24530) – serotonin–norepinephrine–dopamine reuptake inhibitor (SNDRI), serotonin 5-HT2A, 5-HT2C, and 5-HT3 receptor antagonist, and α1A-adrenergic receptor antagonist [36]
Pasteurization is a process for preservation of liquid food. It was originally applied to combat the souring of young local wines. Today, the process is mainly applied to dairy products. In this method, milk is heated at about 70 °C (158 °F) for 15–30 seconds to kill the bacteria present in it and cooling it quickly to 10 °C (50 °F) to prevent the remaining bacteria from growing. The milk is then stored in sterilized bottles or pouches in cold places. This method was invented by Louis Pasteur, a French chemist, in 1862.
Commercial instant soups are manufactured in several types. Some consist of a packet of dry soup stock. These do not contain water, and are prepared by adding water and then heating the product for a short time, or by adding hot water directly to the dry soup mix. Instant soup can also be produced in a dry powder form, such as Unilever's Cup-a-Soup.
Radio Frequency Identification (RFID) – identification tags containing a tiny radio transponder (receiver and transmitter) which are attached to merchandise. When it receives an interrogation pulse of radio waves from a nearby reader unit, the tag transmits back an ID number, which can be used to inventory goods. Passive tags, the most common type, have a chip powered by the radio energy received from the reader, rectified by a diode, and can be as small as a grain of rice. They are incorporated in products, clothes, railroad cars, library books, airline baggage tags and are implanted under the skin in pets and livestock (microchip implant) and even people. Privacy concerns have been addressed with tags that use encrypted signals and authenticate the reader before responding. Passive tags use 125–134 kHz, 13, 900 MHz and 2.4 and 5 GHz ISM bands and have a short range. Active tags, powered by a battery, are larger but can transmit a stronger signal, giving them a range of hundreds of meters. Submarine communication – When submerged, submarines are cut off from all ordinary radio communication with their military command authorities by the conductive seawater. However radio waves of low enough frequencies, in the VLF (30 to 3 kHz) and ELF (below 3 kHz) bands are able to penetrate seawater. Navies operate large shore transmitting stations with power output in the megawatt range to transmit encrypted messages to their submarines in the world's oceans. Due to the small bandwidth, these systems cannot transmit voice, only text messages at a slow data rate.
pyknosis Also pycnosis or karyopyknosis. The irreversible condensation of chromatin inside the nucleus as the cell undergoes necrosis or apoptosis, resulting in a compact mass which stains strongly and is conspicuous under a microscope. It is followed by karyorrhexis.
Sources: en.wikipedia.org
=== Unclaimed Property Program === As secretary of revenue, Kennedy started an initiative to return unclaimed property to the people of Louisiana. At the time, nearly 500,000 people had valuable unclaimed property, such as old bank accounts, stocks, bonds, utility deposits and other lost or forgotten money that had been turned over to the state. Louisiana was one of 39 states to join an effort to return unclaimed property. Kennedy's Louisiana team hosted "Unclaimed Property Awareness Day" at the Lakeside Mall in Metairie, where shoppers claimed more than $365,000 in unclaimed property from the state. Kennedy also launched a website for Louisiana residents to collect unclaimed property online and continued to hold events throughout the state to help people find their unclaimed money. He continued the unclaimed property effort after being elected treasurer.
Manimajra (now referred to as ''Sector 13') is a significant residential and commercial hub in Chandigarh. Reconstituted in February 2020, it bridges the city's historical princely roots with its modern industrial expansion.
"Absorption spectrum of melanin". Department of Computer Science and Technology. "Tyrosine metabolism—Reference pathway". Kyoto Encyclopedia of Genes and Genomes. Retrieved 13 June 2024. "Melanogenesis". Kyoto Encyclopedia of Genes and Genomes. Retrieved 13 June 2024.
Following the UDI, however, Rhodesia began to demonstrate that it had the potential to develop a greater degree of economic self-sufficiency. After the Rhodesian Front began introducing incentives accorded to domestic production, industrial output expanded dramatically. A rigid system of countermeasures enacted to combat sanctions succeeded in blunting their impact for at least a decade. Over the next nine years, Rhodesian companies, spiting the freezing of their assets and blocking of overseas accounts, also perfected cunning techniques of sanctions evasion through both local and foreign subsidiaries, which operated on a clandestine trade network. From 1968 until 1970, there was virtually no further dialogue between Rhodesia and the UK. In a referendum in 1969, white voters approved a new constitution and the establishment of a republic, thereby severing Rhodesia's last links with the British Crown, duly declared in March 1970. This changed immediately after the election of Edward Heath, who reopened negotiations. Smith remained optimistic that Heath would do his utmost to remedy Anglo-Rhodesian relations, although disappointed that he continued to adhere publicly to the original "five principles" proposed by Alec Douglas-Home, now foreign secretary.
Sources: en.wikipedia.org
=== Obstetrics === Fentanyl is sometimes given intrathecally as part of spinal anesthesia or epidurally for epidural anesthesia and analgesia. Because of fentanyl's high lipid solubility, its effects are more localized than morphine, and some clinicians prefer to use morphine to get a wider spread of analgesia. It is widely used in obstetrical anesthesia because of its short time to action peak (about 5 minutes), the rapid termination of its effect after a single dose, and the occurrence of relative cardiovascular stability. In obstetrics, the dose must be closely regulated to prevent large amounts of transfer from mother to fetus. At high doses, the drug may act on the fetus to cause neonatal withdrawal. For this reason, shorter-acting agents such as alfentanil or remifentanil may be more suitable in the context of inducing general anesthesia.
== Single particle == In November 2017, an international team of scientists isolated a single proton in a Penning trap in order to measure its magnetic moment to the highest precision to date. It was found to be 2.79284734462(82) nuclear magnetons. The CODATA 2018 value matches this.
=== Pregnancy and breastfeeding === Although there are no major human studies of prednisolone use in pregnant women, studies in several animals show that it may cause birth defects including increased likelihood of cleft palate. Prednisolone is found in the breast milk of mothers taking prednisolone.
"Sympathetic skin response versus maximum motor and sensory conduction velocity to detect subclinical neuropathy in non-insulin-dependent diabetics". Acta Neurologica Belgica. 91 (4): 213–22. PMID 1746243. Hilz, Max J.; Stemper, Brigitte; Axelrod, Felicia B. (1 May 1999). "Sympathetic skin response differentiates hereditary sensory autonomic neuropathies III and IV". Neurology. 52 (8): 1652–1657. doi:10.1212/wnl.52.8.1652. PMID 10331694. S2CID 24227146. Tsementzis, S A; Hitchcock, E R (1 April 1985). "The spoon test: a simple bedside test for assessing sudomotor autonomic failure". Journal of Neurology, Neurosurgery & Psychiatry. 48 (4): 378–380. doi:10.1136/jnnp.48.4.378. PMC 1028306. PMID 3998743. Khurana, Ramesh K.; Russell, Colin (April 2017). "The spoon test: a valid and reliable bedside test to assess sudomotor function". Clinical Autonomic Research. 27 (2): 91–95. doi:10.1007/s10286-017-0401-2. PMID 28188384. S2CID 8755293.
Acheta domesticus, commonly called the house cricket, is a species of cricket most likely native to Southwestern Asia, but between 1950 and 2000 it became the standard feeder insect for the pet and research industries and spread worldwide. They can be kept as pets themselves, as this has been the case in China and Japan.
Sources: en.wikipedia.org
Creatine is the base compound, while creatine monohydrate includes one water molecule per creatine molecule in its crystal structure. The monohydrate form is common in supplements and analytical standards. The body uses creatine itself after the water is removed or dissociated.
Yes. Meat, fish, and other animal tissues contain creatine. Cooking can convert some creatine to creatinine, which has no role in phosphocreatine energy buffering. Plant foods contain little or no creatine.
Creatinine is a cyclic breakdown product formed from creatine and phosphocreatine. It is filtered by the kidneys and commonly measured in blood and urine as a marker of renal function. Creatine monohydrate is a supplement ingredient and research chemical, not the same molecule.
Purity testing often uses high-performance liquid chromatography to measure creatine and creatinine. Water content can be checked by Karl Fischer titration. Additional tests may cover heavy metals, residual solvents, and microbial contamination.