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- MachinabilityEase with which a metal can be cut
- MacrocycleMolecule with a large ring structure
- Macrocyclic ligandIn coordination chemistry, a macrocyclic ligand is a macrocyclic ring having at least nine
- MacrolideClass of natural products
- Macromolecular assemblyLarge chemical complexes composed of polymers and other macromolecules
- Macromolecular Chemistry and PhysicsMacromolecular Chemistry and Physics is a biweekly peer-reviewed scientific journal coveri
- MacromoleculeVery large molecule
- Macromolecules (journal)Macromolecules is a peer-reviewed scientific journal that has been published since 1968 by
- Madeleine M. JoulliéAmerican chemist
- Madelung synthesisOrganic chemical reaction for producing indoles
- Magic acidSuperacid system prepared from a Brønsted and a Lewis superacid
- Magnesia (regional unit)Regional unit in Greece
- MagnesiumChemical element with atomic number 12 (Mg)
- Magnesium carbonateChemical compound
- Magnesium chlorideInorganic salt: MgCl2 and its hydrates
- Magnesium citrateChemical compound
- Magnesium compoundsMagnesium compounds are compounds formed by the element magnesium (Mg). These compounds ar
- Magnesium hydroxideInorganic compound of formula Mg(OH)2
- Magnesium iodideMagnesium iodide is an inorganic compound with the chemical formula MgI2. It forms various
- Magnesium oxideChemical compound naturally occurring as periclase
- Magnesium silicideMagnesium silicide, Mg2Si, is an inorganic compound consisting of magnesium and silicon. A
- Magnesium sulfateChemical compound with formula MgSO4
- Magnesium sulfideInorganic compound generated in the production of metallic iron
- Magnetic stirrerLaboratory device
- MagnetochemistryStudy of magnetic properties of chemical compounds
- Maillard reactionChemical reaction that gives browned food flavor
- Main group organometallic chemistryMain group organometallic chemistry concerns the preparation and properties of main-group
- Main-group elementChemical elements in groups 1, 2, 13–18
- Major actinideMajor actinides is a term used in the nuclear power industry that refers to the isotopes o
- Major capsid protein VP1Major capsid protein VP1 is a viral protein that is the main component of the polyomavirus
- Malic acidDicarboxylic acid responsible for apple acidity
- Malleable ironFlexible form of cast iron
- MalondialdehydeMalondialdehyde belong to the class of β-dicarbonyls. A colorless liquid, malondialdehyde
- Malonic acidCarboxylic acid with chemical formula CH2(COOH)2
- Malonic ester synthesisType of chemical reaction
- ManganateChemical compound
- ManganeseChemical element with atomic number 25 (Mn)
- Manganese dioxideChemical compound
- Manganese in biologyManganese is an essential biological element in all organisms. It is used in many enzymes
- Manganese(III) oxideManganese(III) oxide is a chemical compound with the formula Mn2O3. It occurs in nature as
- ManganinCopper-based alloy
- Mannich reactionReaction in organic chemistry
- MannitolChemical compound
- Maraging steelSteel known for strength and toughness
- Marcel Benoist PrizeThe Marcel Benoist Prize, offered by the Marcel Benoist Foundation, is a monetary prize th
- Marcus theoryExplanation for the rates of electron transfer reactions
- Marine biogeochemical cyclesMarine biogeochemical cycles are biogeochemical cycles that occur within marine environmen
- Marion C. ThurnauerMarion Charlotte Thurnauer is an American chemist at Argonne National Laboratory (Argonne)
- Marion M. BradfordMarion Mckinley Bradford (October 28, 1946 - May 3, 2021) was an American scientist who de
- Mark–Houwink equationEquation in polymer science
- Marker degradationSynthetic route in steroid chemistry
- Markovnikov's ruleRule for predicting outcomes of some addition reactions
- Marsh testMethod for detecting arsenic
- MartensiteType of steel crystalline structure
- Martin KarplusAustrian-American chemist (1930–2024)
- Martin LowryEnglish physical chemist (1874–1936)
- Martinet dioxindole synthesisChemical reaction
- Mary Jeanne KreekAmerican neurobiologist (1937-2021)
- Masato TanabeMasato "Mas" Tanabe was a drug researcher at SRI International, where he spent 45 years st
- Mass attenuation coefficientProperty of materials
- Mass concentration (chemistry)Chemical term for density of a component in a mixture
- Mass excessDifference between actual mass and mass number for nuclei
- Mass numberNumber of heavy particles in the atomic nucleus
- Mass spectral interpretationMethod of identifying trace chemicals
- Mass spectrometryAnalytical technique based on determining mass to charge ratio of ions
- Mass spectrumA mass spectrum is a histogram plot of intensity vs. mass-to-charge ratio (m/z) in a chemi
- Mass transferNet movement of mass from one location, phase, etc. to another
- Mass-independent fractionationType of process for separating isotopes
- MaterialSubstance or mixture of substances that constitutes an object
- Materials scienceResearch of materials
- Materials science in science fictionMaterials science in science fiction is the study of how materials science is portrayed in
- Matrix (chemical analysis)In chemical analysis, matrix refers to the components of a sample other than the analyte o
- Matrix isolationExperimental chemistry technique
- Max BergmannMax Bergmann (12 February 1886 – 7 November 1944) was a Jewish-German biochemist. Together
- Max BodensteinGerman chemist (1871–1942)
- McMurry reactionChemical reaction
- Measurement uncertaintyFactor of lower probability in measurement
- Mechanical properties of carbon nanotubesThe mechanical properties of carbon nanotubes reveal them as one of the strongest material
- Media dispenserDevice for dispensing small units of liquid
- Medicinal chemistryScientific branch of chemistry
- Meerwein–Ponndorf–Verley reductionReduction of ketones and aldehydes to their corresponding alcohols
- MeitneriumChemical element with atomic number 109 (Mt)
- Mellitic anhydrideMellitic anhydride, the anhydride of mellitic acid, is an organic compound with the formul
- MembraneThin, film-like structure separating two fluids, acting as a selective barrier
- Membrane gas separationGas mixtures can be effectively separated by synthetic membranes made from polymers such a
- Membrane technologyTransport of substances between two fractions with the help of permeable membranes
- Mendeleev's predicted elementsElements predicted but not found in 1869
- MendeleviumChemical element with atomic number 101 (Md)
- MentholOrganic compound used as flavouring and analgesic
- MenthoneChemical compound
- MerbrominOrganomercuric antiseptic for external use on minor cuts
- Mercury (element)Chemical element with atomic number 80 (Hg)
- Mercury relayA mercury relay (mercury displacement relay, mercury contactor) is a relay that uses mercu
- Mercury sulfideChemical compound
- Mercury(II) chlorideToxic mercury compound known as 'corrosive sublimate'
- Meredith Gwynne EvansBritish chemist
- Mesityl oxideMesityl oxide is a α,β-unsaturated ketone with the formula CH3C(O)CH=C(CH3)2. This compoun
- Meso compoundOptically inactive isomer in a set of stereoisomers
- Mesomeric effectIn chemistry, the mesomeric effect (or resonance effect) is a property of substituents or
- Mesoxalic acidMesoxalic acid, also called oxomalonic acid or ketomalonic acid, is an organic compound wi
- MetaboliteIntermediate or end product of metabolism
- Metaboric acidMetaboric acid is the name for a family of inorganic compounds with the same empirical for
- MetalType of material
- Metal carbonylCoordination complexes of transition metals and metal ions with carbon monoxide ligands
- Metal dithiolene complexDithiolene metal complexes are complexes containing 1,2-dithiolene ligands. 1,2-Dithiolene
- Metal fume feverMetal fume fever, also known as brass founders' ague, brass shakes, zinc shakes, galvie fl
- Metal ions in aqueous solutionProperties and behavior of hydrated cations in aqueous solution
- Metal nitrido complexMetal nitrido complexes are coordination compounds and metal clusters that contain an atom
- Metal-phosphine complexA metal-phosphine complex is a coordination complex containing one or more phosphine ligan
- Metallic bondingType of chemical bond in metals
- MetalloidChemical element with metallic and nonmetallic properties
- Metallophilic interactionIn chemistry, a metallophilic interaction is defined as a type of non-covalent attraction
- Metallurgical assayA metallurgical assay is a compositional analysis of an ore, metal, or alloy, usually perf
- METAP2Methionine aminopeptidase 2 is an enzyme that in humans is encoded by the METAP2 gene.
- MethaneHydrocarbon compound (CH4) in natural gas
- MethanethiolChemical compound (CH3SH)
- MethanolCH3OH; simplest possible alcohol
- Methanol (data page)This page provides supplementary chemical data on methanol.
- Methanol toxicityMedical condition (poisoning)
- Methoxy groupIn organic chemistry, a methoxy group is the functional group consisting of a methyl group
- Methyl acetateChemical compound
- Methyl butyrateMethyl butyrate, also known under the systematic name methyl butanoate, is the methyl este
- Methyl cyanoacrylateMethyl cyanoacrylate (MCA; also sometimes referred to as α-cyanoacrylate or alpha-cyanoacr
- Methyl fluoroacetateMethyl fluoroacetate (MFA) is an organic compound with the chemical formula FCH2CO2CH3. It
- Methyl greenMethyl green (CI 42585) is a cationic or positive charged stain related to Ethyl Green tha
- Methyl groupChemical group (–CH3) derived from methane
- Methyl hypochloriteMethyl hypochlorite is the simplest of the organic alkyl hypochlorites. It is an unstable
- Methyl salicylateEster of salicylic acid
- MethylamineOrganic ammonia derivative
- MethylationChemical process in which a methyl (CH3) group is covalently attached to a molecule
- Methylene blueBlue dye also used as a medication
- Methylene bridgeIn organic chemistry, a methylene bridge, methylene spacer, or methanediyl group is any pa
- Methylene groupA methylene group is any part of a molecule that consists of two hydrogen atoms bound to a
- Micellar electrokinetic chromatographyMicellar electrokinetic chromatography (MEKC) is a chromatography technique used in analyt
- MicelleGroup of fatty molecules suspended in liquid by soaps and/or detergents
- Michael addition reactionReaction in organic chemistry
- Michael J. S. DewarAmerican chemist
- MicrofiberSynthetic fiber
- MicrofiltrationPhysical process where a fluid is passed through a special pore-sized membrane
- MicroreactorTiny device in which chemical reactions take place
- Microscopic reversibilityConcept in chemistry and physics
- MicrostructureVery small scale structure of material
- Microwave spectroscopyStudy of matter through the use of microwaves
- Migratory insertionChemical reaction in which two ligands of a metal complex combine
- Mineral acidAcid derived from inorganic compounds
- Minor actinideCategory of elements in spent nuclear fuel
- MirabiliteMirabilite, also known as Glauber's salt, is a hydrous sodium sulfate mineral with the che
- MischmetalPyrophoric rare-earth metal alloy
- MiscibilityAbility of two substances to form a homogeneous solution when mixed
- Mixing (process engineering)Process of mechanically stirring a heterogeneous mixture to homogenize it
- MixtureSubstance formed when two or more constituents are physically combined
- Miyaura borylationMiyaura borylation, also known as the Miyaura borylation reaction, is a named reaction in
- Modern valence bond theoryRevised theory in chemical bonding
- Molar heat capacityIntensive quantity, heat capacity per amount of substance
- Molar massMass per amount of substance
- Molar mass distributionIn polymer chemistry, the molar mass distribution (or molecular weight distribution) descr
- Molar volumeVolume occupied by one mole of a substance
- Molding (process)Shaping a liquid or plastic material by making it conform to a more rigid mold
- Molecular Borromean ringsIn chemistry, molecular Borromean rings are an example of a mechanically-interlocked molec
- Molecular configurationPermanent geometry of a molecule
- Molecular geometryStudy of the 3D shapes of molecules
- Molecular graphicsComputer graphics
- Molecular HamiltonianIn atomic, molecular, and optical physics and quantum chemistry, the molecular Hamiltonian
- Molecular massMass of a given molecule in daltons
- Molecular modelPhysical model for representing molecules
- Molecular modellingDiscovering chemical properties by physical simulations
- Molecular self-assemblyMovement of molecules into a defined arrangement without outside influence
- Molecular symmetrySymmetry of molecules of chemical compounds
- Molecular term symbolIn molecular physics, the molecular term symbol is a shorthand expression of the group rep
- Molecular vibrationPeriodic motion of the atoms of a molecule
- Molecular wireMolecular wires (or sometimes called molecular nanowires) are molecular chains that conduc
- MolecularityNumber of molecules that participate in a single-step reaction
- MoleculeElectrically neutral group of two or more atoms
- Møller–Plesset perturbation theoryMethod in ab initio Quantum Chemistry
- Molten saltSalt that has melted, often by heating to high temperatures
- MolybdateChemical compound of the form –O–MoO2–O–
- MolybdenumChemical element with atomic number 42 (Mo)
- Molybdenum disulfideChemical compound
- Molybdenum hexacarbonylMolybdenum hexacarbonyl (also called molybdenum carbonyl) is the chemical compound with th
- Molybdenum(II) acetateMolybdenum(II) acetate is a coordination compound with the formula Mo2(O2CCH3)4. It is a y
- MongardinoMongardino is a comune (municipality) in the Province of Asti in the Italian region Piedmo
- Mónica Bettencourt-DiasPortuguese biochemist and cellular biologist
- Monohydrogen phosphateHydrogen phosphate or monohydrogen phosphate (systematic name) is the inorganic ion with t
- MonolignolMonolignols, also called lignols, are the source materials for biosynthesis of both lignan
- MonomerMolecule which reacts with other monomers to form a polymer
- MonooxygenaseMonooxygenases are enzymes that incorporate one hydroxyl group (−OH) into substrates in ma
- Monosodium citrateChemical compound
- Monosodium glutamateFlavor enhancer (621 or E621)
- Monosodium phosphateMonosodium phosphate (MSP), also known as monobasic sodium phosphate and sodium dihydrogen
- Monosodium tartrateMonosodium tartrate or sodium bitartrate is a sodium acid salt of tartaric acid. As a food
- MonoterpeneUnsaturated hydrocarbon
- MordantSubstance used for binding dyes to fabrics
- MordentIn music, a mordent is an ornament indicating that the note is to be played with a single
- MoscoviumChemical element with atomic number 115 (Mc)
- Moses GombergAmerican chemist (1866–1947)
- MucilageThick, gluey substance produced by nearly all plants and some microorganisms
- Multi-stage flash distillationMulti-stage flash distillation (MSF) is a water desalination process that distills sea wat
- MuskClass of aromatic substances used in perfumes
- MyoglobinIron and oxygen-binding protein
