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- L-form bacteriaL-form bacteria, also known as L-phase bacteria, L-phase variants or cell wall-deficient b
- Laboratory water bathApparatus for incubating samples
- LacquerType of hard and shiny finish
- LactamCyclic amide
- Lactic acidOrganic acid
- LactoneCyclic carboxylic ester
- Lamé parametersIn continuum mechanics, Lamé parameters (also called the Lamé coefficients, Lamé constants
- Laminar flow reactorReaction using laminar dynamics
- Langmuir adsorption modelModel describing the adsorption of a mono-layer of gas molecules on an ideal flat surface
- LanthanideElements with atomic numbers 57-70
- Lanthanide contractionDecrease of ionic radii across the lanthanide series
- Lanthanide oxyhalideA lanthanide oxyhalide is an inorganic compound that contains a lanthanide (Ln), oxide, an
- Lanthanide trifluoromethanesulfonatesTriflate salts of the lanthanides
- LanthaniteLanthanites are a group of isostructural rare earth element (REE) carbonate minerals. This
- LanthanumChemical element with atomic number 57 (La)
- Lanthanum compoundsChemical compounds containing the element lanthanum
- Lanthanum hexaborideLanthanum hexaboride (LaB6, also called lanthanum boride and LaB) is an inorganic chemical
- Lanthanum oxyfluorideLanthanum(III) oxyfluoride is an inorganic compound of lanthanum, fluorine, and oxygen wit
- Laser diffraction analysisTechnology for measuring geometrical dimensions of particle
- Late harvest wineLate harvest wine is wine made from grapes left on the vine longer than usual. Late harves
- Late-stage functionalizationLate-stage functionalization (LSF) is a desired, chemical or biochemical, chemoselective t
- Latimer diagramRepresentation of the standard electrode potential data of an element
- Lattice constantPhysical dimensions of unit cells in a crystal
- Lattice energyEnergy change upon the formation of one mole of ionic solid
- Laundry detergentType of detergent used for cleaning laundry
- Law of definite proportionsChemical law about ratio of substances in a compound
- Law of dilutionLaw of Ostwald for dissociation of electrolytes
- Law of mass actionLaw about the rate of chemical reactions
- Law of multiple proportions1804 observation in physical chemistry
- Law of reciprocal proportionsThe law of reciprocal proportions, also called law of equivalent proportions or law of per
- Lawrence E. GlendeninLawrence Elgin Glendenin (November 8, 1918 – November 22, 2008) was an American chemist wh
- LawrenciumChemical element with atomic number 103 (Lr)
- Le Chatelier's principlePrinciple to predict effects of a change in conditions on a chemical equilibrium
- Leaching (chemistry)Extraction of some soluble substances from a solid material into a liquid
- Leaching (metallurgy)Metallurgical process used to extract valuable material from an ore
- LeadChemical element with atomic number 82 (Pb)
- Lead chamber processIndustrial process
- Lead compoundsType of compound
- Lead dioxideChemical compound
- Lead paintPaint containing lead compounds as pigments
- Lead tetrafluorideLead tetrafluoride is a compound of lead and fluorine. The yellow solid (melting point 600
- Lead(II,IV) oxideLead(II,IV) oxide, also called red lead or minium, is the inorganic compound with the form
- Lead(II) acetateChemical compound
- Lead(II) azideChemical compound
- Lead(II) chromateChemical compound
- Lead(II) nitrateChemical compound
- Lead(II) oxideChemical compound
- Lead(II) sulfateLead(II) sulfate (PbSO4) is a white solid, which appears white in microcrystalline form. I
- Lead(II) sulfideLead(II) sulfide (also spelled sulphide) is an inorganic compound with the formula PbS. Ga
- Lead(IV) acetateLead(IV) acetate or lead tetraacetate is an metalorganic compound with chemical formula Pb
- Leaving groupAtom(s) that detach from the substrate during a chemical reaction
- Leblanc processFormer industrial process for producing sodium carbonate from salt
- Legal smoking ageMinimum age at which a person can legally purchase or consume tobacco products
- Leimgruber–Batcho indole synthesisChemical reaction
- Lemieux–Johnson oxidationChemical reaction
- Leopold RužičkaCroatian-Swiss chemist (1887–1976)
- Lethal doseSufficient amount to kill
- Letts nitrile synthesisChemical reaction
- Leuckart reactionChemical reaction
- Leveling effectEffect of solvents on properties of acids and bases
- Levulinic acidLevulinic acid, or 4-oxopentanoic acid, is an organic compound with the formula CH3C(O)CH2
- Lewis acid catalysisUse of metal-based Lewis acids to catalyze organic reactions
- Lewis acids and basesChemical bond theory
- Lewis structureDiagrams for the bonding between atoms of a molecule and lone pairs of electrons
- Lidija LiepiņaLatvian physical chemist
- Liebig condenserThe Liebig condenser (, LEE-big) or straight condenser is a piece of laboratory equipment,
- Liebigs AnnalenAcademic journal
- LigandIon or molecule bound to a metal atom
- Ligand cone angleMeasure of the steric bulk of a ligand in a coordination complex
- Ligand field theoryMolecular orbital theory applied to transition metal complexes
- Light metalA light metal is any metal of relatively low density. These may be pure elements, but more
- LigninStructural phenolic polymer in plant cell walls
- Lignin-modifying enzymeLignin-modifying enzymes (LMEs) are various types of enzymes produced by fungi and bacteri
- Lime (material)Calcium oxides and/or hydroxides
- Lime sulfurChemical mixture used as a pest control agent
- LimescaleHard, chalky deposit of calcium carbonate
- Limiting reagentChemical reactant totally consumed when the reaction is finished
- LimoneneType of molecule
- LinaloolChemical compound with a floral aroma
- Linear alkylbenzeneChemical compound
- Linear combination of atomic orbitalsTechnique in quantum chemistry
- Linear molecular geometry3D shape of molecules in which all bond angles are 180°
- Lipid ALipid component of lipopolysaccharide endotoxins of gram-negative bacteria
- Lipid bilayer phase behaviorIn colloidal chemistry, one property of a lipid bilayer is the relative mobility (fluidity
- Lipid-based nanoparticleNovel drug delivery system
- LipophilicityAffinity of a molecule or a moiety for a lipophilic environment
- LipophobicityChemical property
- LiposomeComposite structure formed by phospholipids
- Liquid airAir that has been condensed into a liquid
- Liquid chromatography–mass spectrometryAnalytical chemistry technique
- Liquid heliumLiquid state of the element helium
- Liquid hydrogenLiquid state of the element hydrogen
- Liquid nitrogenLiquid state of nitrogen
- Liquid nitrogen cocktailDrinks with liquid nitrogen
- Liquid oxygenOne of the physical forms of elemental oxygen
- Liquid–liquid extractionMethod to separate compounds or metal complexes
- List of copper alloysMetal alloy with copper as its principal component
- LithiumChemical element with atomic number 3 (Li)
- Lithium acetateLithium acetate (CH3COOLi) is a salt of lithium and acetic acid. It is often abbreviated a
- Lithium aluminium hydrideChemical compound
- Lithium azideLithium azide is the lithium salt of hydrazoic acid. It is an unstable and toxic compound
- Lithium borohydrideChemical compound
- Lithium carbonateChemical compound
- Lithium chlorideChemical compound
- Lithium cyanideLithium cyanide is an inorganic compound with the chemical formula LiCN. It is a toxic, wh
- Lithium hydrideChemical compound
- Lithium hypochloriteLithium hypochlorite is a chemical compound with the chemical formula of LiOCl. It is the
- Lithium iron phosphate batteryType of rechargeable battery without cobalt
- Lithium nitrideChemical compound
- Lithium oxideChemical compound
- Lithium phosphideLithium phosphide is an inorganic compound of lithium and phosphorus with the chemical for
- Lithium polonideLithium polonide is a chemical compound with the formula Li2Po. It is a polonide, a set of
- Lithium selenideLithium selenide is an inorganic compound that formed by selenium and lithium. It is a sel
- Lithium superoxideLithium superoxide is an unstable inorganic salt with formula LiO2. A radical compound, it
- Lithium tellurideLithium telluride (Li2Te) is an inorganic compound of lithium and tellurium. Along with Li
- Lithium triethylborohydrideLithium triethylborohydride is the organoboron compound with the formula LiEt3BH. Commonly
- Lithium–sulfur batteryType of rechargeable battery
- LitmusSubstance to test chemical acidity
- Liver support systemTherapeutic device
- LivermoriumChemical element with atomic number 116 (Lv)
- Living cationic polymerizationLiving cationic polymerization is a living polymerization technique involving cationic pro
- Living polymerizationChain-growth polymerization without the ability to terminate
- Load line (watercraft)Legal limit to which a ship may be loaded
- Lobry de Bruyn–Van Ekenstein transformationRearrangement reaction
- Localized molecular orbitalsAspect of quantum chemistry
- LocantPrefix in organic chemistry nomenclature
- London dispersion forceCohesive force between species
- Lone pairPair of valence electrons which are not shared with another atom in a covalent bond
- LonsdaleiteHexagonal lattice allotrope of carbon
- Los, SwedenLos is a locality situated in Ljusdal Municipality, Gävleborg County, Sweden with 332 inha
- Lossen rearrangementChemical rearrangement reaction
- Louis Jacques ThénardLouis Jacques Thénard (4 May 1777 – 21 June 1857) was a French chemist.
- Løvøya, TelemarkLøvøya is an island in Porsgrunn Municipality in Telemark county, Norway. The 0.25-square-
- Low-barrier hydrogen bondA Low-barrier hydrogen bond (LBHB) is a special type of hydrogen bond. LBHBs can occur whe
- Lower critical solution temperatureTemperature below which components of a mixture are miscible
- Lowry protein assayBiochemical colorimetric method
- LubricationPresence of a material to reduce friction between two surfaces
- Lucas' reagentChemical reagent used to differentiate 1°, 2°, 3° Alcohols
- Ludwig GattermannGerman chemist (1860–1920)
- Ludwig KnorrLudwig Knorr (2 December 1859 – 4 June 1921) was a German chemist. Together with Carl Paal
- Lugol's iodineAqueous solution of iodine and potassium iodide
- Luminescent solar concentratorDevice for concentrating solar radiation using luminescence
- LundenLunden is a municipality in the district of Dithmarschen, in Schleswig-Holstein, Germany.
- Lurs, Alpes-de-Haute-ProvenceLurs is a commune in the Alpes-de-Haute-Provence department in the Provence-Alpes-Côte d'A
- LuteolinLuteolin is a flavone, a type of flavonoid, with a yellow crystalline appearance.
- LutetiumChemical element with atomic number 71 (Lu)
- Lutetium compoundsChemical compounds
- LyeSodium hydroxide and potassium hydroxide
- Lyotropic liquid crystalSolution of amphiphilic molecules which has both fluid and crystalline properties
