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- Table of nuclidesGraph of neutrons vs. protons in nuclides
- TacticityRelative conformational uniformity of repeating units in a macromolecule
- TalaporfinTalaporfin (INN, also known as aspartyl chlorin, mono-L-aspartyl chlorin e6, NPe6, or LS11
- Tandem mass spectrometryTandem mass spectrometry, also known as MS/MS or MS2, is a technique in instrumental analy
- Tank carTrain car for holding liquids and gases
- Tannic acidChemical compound
- TanninClass of astringent, bitter plant polyphenolic chemical compounds
- TantalumChemical element with atomic number 73 (Ta)
- TarDark viscous organic liquid
- TarnishCorrosion on outer layer of some metals
- Tartaric acidOrganic acid found in many fruits
- Tartronic acidTartronic acid or 2-hydroxymalonic acid is an organic compound with the structural formula
- TaurineAminosulfonic acid
- TautomerIsomers of chemical compounds that interconvert
- TaxaneTaxanes are a class of diterpenes. They were originally identified from plants of the genu
- Tebello NyokongSouth African chemist and professor
- TechnetiumChemical element with atomic number 43 (Tc)
- Technetium-99mMetastable nuclear isomer of technetium-99
- Telluric acidTelluric acid, or more accurately orthotelluric acid, is a chemical compound with the form
- TelluriumChemical element with atomic number 52 (Te)
- Tellurium trioxideTellurium trioxide (TeO3) is an inorganic chemical compound of tellurium and oxygen. In th
- Tempered representationType of representation of a linear semisimple Lie group
- TennessineChemical element with atomic number 117 (Ts)
- TerbiumChemical element with atomic number 65 (Tb)
- TerpeneClass of oily organic compounds found in plants
- TerpenoidClass of aromatic organic chemicals found in plants
- TerpyridineTerpyridine (2,2';6',2"-terpyridine, often abbreviated to Terpy or Tpy) is a heterocyclic
- Tert-Butyl hypochloritetert-Butyl hypochlorite is the organic compound with the formula (CH3)3COCl. A yellow liqu
- Tert-Butyloxycarbonyl protecting groupThe tert-butyloxycarbonyl protecting group or tert-butoxycarbonyl protecting group (BOC gr
- TetraethylleadOrganolead compound
- Tetrahedral molecular geometryCentral atom with four substituents located at the corners of a tetrahedron
- TetrahydrofuranCyclic chemical compound, (CH2)4O
- Tetrahydrofuran (data page)This page provides supplementary chemical data on tetrahydrofuran.
- TetralithiomethaneTetralithiomethane, also known as tetralithium carbide, is an organolithium compound with
- Tetramethyl orthosilicateTetramethyl orthosilicate (TMOS) is the chemical compound with the formula Si(OCH3)4. This
- Tetrasodium EDTAChemical compound
- TetroseIn organic chemistry, a tetrose is a monosaccharide with 4 carbon atoms. They have either
- ThallaneThallane (systematically named trihydridothallium) is an inorganic compound with the empir
- ThalliumChemical element with atomic number 81 (Tl)
- Thallium(III) oxideThallium(III) oxide, also known as thallic oxide, is a chemical compound of thallium and o
- TheobromineBitter alkaloid of the cacao plant
- Theodor CurtiusGerman chemist (1857–1928)
- Theodor SvedbergSwedish chemist (1884–1971)
- Theodore KuwanaJapanese American chemist (1931–2022)
- Theodore William RichardsAmerican chemist and Nobel laureate (1868–1928)
- TheonellidaeTheonellidae is a family of sponges belonging to the order Tetractinellida, which was firs
- TheophyllineDrug used to treat respiratory diseases
- Theoretical chemistryBranch of chemistry
- Theoretical plateHypothetical stage of matter
- Thermal analysisThermal analysis is a branch of materials science where the properties of materials are st
- Thermal burnBurn to the skin caused by any external heat source
- Thermal decompositionChemical decomposition caused by heat
- Thermal diffusivityRate at which heat spreads throughout a material
- Thermal runawayLoss of control of an exothermal process due to temperature increases
- ThermitePyrotechnic composition of metal powder and metal oxide
- ThermochemistryBranch of thermodynamics
- Thermodynamic activityMeasure of the effective concentration of a species in a mixture
- Thermodynamic and kinetic reaction controlThermodynamic reaction control or kinetic reaction control in a chemical reaction can deci
- Thermogravimetric analysisThermal method of analysis
- ThermolabileChemical property of substances
- ThermoplasticPlastic that softens with heat and hardens on cooling
- ThermostabilityAbility of a substance to resist changes in structure under high temperatures
- ThermotropismThermotropism or thermotropic movement is the movement of an organism or a part of an orga
- ThiazolineThiazolines (; or dihydrothiazoles) are a group of isomeric 5-membered heterocyclic compou
- Thin filmThin layer of material
- Thin-film interferenceOptical phenomenon
- Thin-layer chromatographyTechnique used to separate non-volatile mixtures
- Thiocarbonic acidThiocarbonic acid is an acid with the chemical formula H2CS3 (or S=C(SH)2). It is an analo
- ThiocyanateChemical compound
- Thiocyanic acidChemical compound (H–S–C≡N)
- ThioformaldehydeThioformaldehyde is the organosulfur compound with the formula CH2S. It is the simplest th
- ThiolAny organic compound having a sulfanyl group (–SH)
- ThiomersalOrganomercury antiseptic and antifungal agent
- ThiosulfatePolyatomic ion (S2O3, charge –2)
- ThoriumChemical element with atomic number 90 (Th)
- Thorium dioxideChemical compound
- Thorium-232Isotope of thorium
- Thorium(IV) sulfideThorium(IV) sulfide (ThS2) is an inorganic chemical compound composed of one thorium atom
- ThuliumChemical element with atomic number 69 (Tm)
- Thulium-170Thulium-170 (170Tm or Tm-170) is a radioactive isotope of thulium proposed for use in radi
- ThymolChemical compound found in plants including thyme
- Thymol blueThymol blue (thymolsulfonephthalein) is a brownish-green or reddish-brown crystalline powd
- Thymus vulgarisThymus vulgaris (common thyme, German thyme, garden thyme or just thyme) is a species of f
- Timeline of chemistryThis timeline of chemistry lists important works, discoveries, ideas, inventions, and expe
- TinChemical element with atomic number 50 (Sn)
- Tin(IV) oxideChemical compound known as stannic oxide, cassiterite and tin ore
- TinctureHerbal liquid
- Tincture of iodineAntiseptic solution rubbed on skin before surgical operations
- Titanic acidTitanic acid is a general name for a family of chemical compounds of the elements titanium
- TitaniumChemical element with atomic number 22 (Ti)
- Titanium dioxideChemical compound
- Titanium dioxide nanoparticleNanomaterial
- Titanium isopropoxideTitanium isopropoxide, also commonly referred to as titanium tetraisopropoxide or TTIP, is
- Titanium nitrideCeramic material
- Titanium tetraiodideTitanium tetraiodide is an inorganic compound with the formula TiI4. It is a black volatil
- Titanium(II) oxideTitanium(II) oxide (TiO) is an inorganic chemical compound of titanium and oxygen. It can
- Titanium(III) oxideTitanium(III) oxide is the inorganic compound with the formula Ti2O3. A black semiconducti
- TitrationLaboratory method for determining the concentration of an analyte
- TNTImpact-resistant high explosive
- Tobacco industryPersons and companies that produce tobacco-related products
- Toluca (meteorite)Toluca is a group of iron meteorites found in Jiquipilco, Mexico near Toluca.
- TolueneAromatic hydrocarbon
- Tom Brown (chemist)British chemist
- Tool steelMaterials well-suited to be made into tools
- Torbern BergmanSwedish chemist and mineralogist (1735–1784)
- Total synthesisComplete chemical synthesis of a complex molecule
- Toxicology of carbon nanomaterialsThe toxicology of carbon nanomaterials is the study of toxicity in carbon nanomaterials, s
- Trace radioisotopeRadioisotope that occurs naturally in trace amounts
- TransesterificationTransesterification is the process of exchanging the organic functional group R″ of an est
- Transfer hydrogenationAddition of non-molecular hydrogen to a compound
- Transfermium WarsThe names for the chemical elements 104 to 106 were the subject of a major controversy sta
- Transition metalSeries of chemical elements
- Transition metal carbene complexClass of organometalic compounds
- Transition metal hydrideTransition metal hydrides are chemical compounds containing a transition metal bonded to h
- Transition metal imido complexIn coordination chemistry and organometallic chemistry, transition metal imido complexes i
- Transition stateConfiguration of a chemical reaction when potential energy is greatest
- Transition state theoryTheory describing chemical reaction rates
- Transuranium elementElement whose atomic number is greater than 92
- Triangular prismatic honeycombThe triangular prismatic honeycomb or triangular prismatic cellulation is a space-filling
- Triatomic moleculeTriatomic molecules are molecules composed of three atoms, of either the same or different
- Trickling filterType of wastewater treatment system with a fixed bed of rocks or similar
- Triethyl citrateTriethyl citrate is an ester of citric acid. It is a colorless, odorless liquid used as a
- TriethylaluminiumTriethylaluminium is one of the simplest examples of an organoaluminium compound. Despite
- Triflic acidChemical compound
- Trigonal planar molecular geometryMolecular geometry of symmetry D_3h
- Trigonal pyramidal molecular geometryConfiguration of atoms within a molecule
- Trimagnesium phosphateTrimagnesium phosphate describes inorganic compounds with formula Mg3(PO4)2.xH2O. They are
- Trimer (chemistry)Molecule consisting of three identical molecules bound together
- TrimethylphosphineTrimethylphosphine is an organophosphorus compound with the formula P(CH3)3, commonly abbr
- Trimethylsilyl iodideTrimethylsilyl iodide (iodotrimethylsilane or TMSI) is an organosilicon compound with the
- TriphosphaneTriphosphane (IUPAC systematic name) or triphosphine is an inorganic compound having the c
- TriphosphataseIn enzymology, a triphosphatase (EC 3.6.1.25) is an enzyme that catalyzes the chemical rea
- Triphosphoric acidTriphosphoric acid (also tripolyphosphoric acid), with formula H5P3O10, is a condensed for
- Triple bondChemical bond involving six bonding electrons; one sigma plus two pi bonds
- Triplet oxygenTriplet state of the dioxygen molecule
- Triplet stateIn quantum mechanics, a triplet state, or spin triplet, is the quantum state of an object
- Tris(pentafluorophenyl)boraneTris(pentafluorophenyl)borane, sometimes referred to as "BCF", is the chemical compound (C
- TrisilaneTrisilane is the silane with the formula H2Si(SiH3)2. A liquid at standard temperature and
- Trisodium citrateChemical compound
- Trisodium phosphateChemical compound
- Tristimulus colorimeterA tristimulus colorimeter, colloquially shortened to colorimeter or colourimeter, is used
- Tritiated waterRadioactive form of water
- TritiumIsotope of hydrogen with two neutrons
- Trivial nameCommon name for a chemical substance
- Truncated icosahedronPolyhedron resembling a soccerball
- TungstenChemical element with atomic number 74 (W)
- Tungsten carbideHard, dense and stiff chemical compound
- Tungsten nitrideTungsten nitride (W2N, WN, WN2) is an inorganic compound, a nitride of tungsten. It is a h
- TurpentineLiquid distilled from pine resin
- Two-dimensional gel electrophoresisForm of gel electrophoresis used in analyzing proteins
- Tyndall effectScattering of light by tiny particles in a colloidal suspension
- Types of periodic tablesDifferent forms of the table of elements
