All articles starting with a number or symbol

13,599 articles

1-Hydroxypyrene

1-Hydroxypyrene (1-HP), also called 1-pyrenol or pyren-1-ol, is a metabolite of the PAH pyrene, excreted in urine and the most widely used biomarker of human PAH exposure.

1-inch type C videotape

1-inch type C videotape is a professional reel-to-reel analog helical-scan format co-developed by Ampex and Sony, standardized by SMPTE and introduced in 1978 as the standard broadcast recording format.

1-Methylimidazole

1-Methylimidazole (N-methylimidazole) is a colorless, hygroscopic organic compound and moderately strong base; its alkylation produces most imidazolium ionic liquids, and BASF's BASIL process uses it as an acid scavenger.

1-Naphthol

1-Naphthol, also called α-naphthol, is a phenolic compound and human metabolite of carbaryl and naphthalene, used to make the insecticide carbaryl and dyes, and measured in urine as an exposure biomarker.

1-Naphthylamine

1-Naphthylamine, also called alpha-naphthylamine, is an aromatic amine used as an intermediate in dye, herbicide, and rubber antioxidant manufacture; unlike 2-naphthylamine, its carcinogenicity to humans is not classifiable.

1-Octanol

1-Octanol (octan-1-ol, caprylic alcohol) is a colorless, water-insoluble eight-carbon fatty alcohol with a citrus-like odor, used in perfumes, flavors, and as the standard solvent for measuring octanol/water partition coefficients.

1-Octene

1-Octene (oct-1-ene) is a colorless liquid alpha-olefin, an eight-carbon alkene with a terminal double bond, produced by ethylene oligomerization and used mainly as a polyethylene comonomer and in lubricants and surfactants.

1-Pentene

1-Pentene, also called pent-1-ene, is a linear alpha-olefin, a five-carbon alkene with a terminal double bond, an extremely flammable colorless liquid used chiefly as a polyethylene comonomer.

1-phosphofructokinase

1-phosphofructokinase (1-PFK, EC 2.7.1.56) is a kinase that adds a phosphate group to carbon 6 of betaD-fructose 1-phosphate, acting in bacterial and archaeal fructose degradation.

1-Wire

1-Wire, also called OneWire, is a device bus system from Dallas Semiconductor (1989) that sends low-speed data, signaling, and power over one data line plus ground.

1, 1 dichloro 2, 2 bis ethane

1,1-dichloro-2,2-bis ethane, also DDD or p,p'-TDE (CAS 72-54-8), is an organochlorine insecticide and DDT metabolite, formula C14H10Cl4, RCRA waste U060, with 0.01 mg/kg residue limits.

1, 2, 3 Soleils

1, 2, 3 Soleils, also billed "Un deux trois Soleils", is a 1998 live album by Khaled, Faudel, and Rachid Taha, recorded at the Palais omnisports de Paris-Bercy.

1, 3, 3 trimethyl 4, 6 dioxatricyclo [3. 3. 1. 02, 7] nonane

1,3,3-Trimethyl-4,6-dioxatricyclo[3.3.1.0²,⁷]nonane, or lineatin, is the tricyclic acetal aggregation pheromone (C10H16O2) of the ambrosia beetle Trypodendron lineatum; the (+)-enantiomer (1R,4S,5R,7R) is the natural attractant, and the substance is not approved as an EU pesticide active substance.

1,000,000

1,000,000 (one million, ten lakh) is the natural number equal to 10 to the 6th power, the first named number above a thousand in the English short scale.

1,000,000,000

1,000,000,000, called one billion or one thousand million, is the number 10 to the ninth power, matching the SI prefix giga, as in gigawatt and gigahertz.

1,000,000,000,000

1,000,000,000,000 is the number 10 to the 12th power, a one followed by twelve zeros, called one trillion on the short scale and one billion on the long scale.

1,039/Smoothed Out Slappy Hours

1,039/Smoothed Out Slappy Hours is Green Day's 1991 Lookout! Records compilation of the 39/Smooth LP and the Slappy and 1,000 Hours EPs; 19 tracks, John Kiffmeyer on drums, RIAA Gold, Billboard 200 peak No. 190.

1,1-Difluoroethane

1,1-Difluoroethane, also known as ethylidene difluoride, is a colorless flammable gas (HFC-152a) used mainly as an aerosol propellant, foam blowing agent, and refrigerant with zero ozone depletion.

1,1-Diphenylethylene

1,1-Diphenylethylene, also called α-phenylstyrene, is a colorless liquid alkene carrying two phenyl groups on the same double-bond carbon, best known for resisting homopolymerization while serving as a key reagent in living anionic polymerization.

1,1,1-Trichloroethane

1,1,1-Trichloroethane, also known as methyl chloroform, is a chlorinated solvent once widely used for metal cleaning and degreasing until its production was phased out under the Montreal Protocol because it depletes ozone.

1,1,1,2-Tetrafluoroethane

1,1,1,2-Tetrafluoroethane, also known as norflurane, HFC-134a, or R-134a, is a hydrofluorocarbon used chiefly as the refrigerant in motor vehicle air conditioning and as an inhaler propellant.

1,1,1,2-Tetrafluoroethane (HFC-134a) as an extraction solvent

HFC-134a (R-134a, norflurane), a non-flammable fluorocarbon refrigerant boiling at -26 C, is liquefied under pressure as a sub-critical extraction solvent for food flavors, hops, coffee, and cannabinoids; FDA GRAS notice GRN 82, FAO limit 0.02 mg/kg.

1,1'-Bis(diphenylphosphino)ferrocene

1,1'-Bis(diphenylphosphino)ferrocene, known as dppf, is a bidentate diphosphine ligand on a ferrocene backbone. First made in 1965, it is widely used in palladium-catalyzed cross-coupling reactions.

1,10-Phenanthroline

1,10-Phenanthroline, also called o-phenanthroline, is a heterocyclic organic compound, formula C₁₂H₈N₂, whose two adjacent nitrogen atoms chelate metals; it is widely used in coordination chemistry and for measuring iron.

1,2-Bis(diphenylphosphino)ethane

1,2-Bis(diphenylphosphino)ethane, abbreviated dppe and also sold as Diphos, is a bidentate diphosphine ligand with a small bite angle of about 85 degrees, widely used in coordination chemistry and homogeneous catalysis.

1,2-Butanediol

1,2-Butanediol, also called 1,2-butylene glycol or butane-1,2-diol, is a colorless, water-miscible vicinal diol of formula C4H10O2, produced from butylene oxide and used as a solvent, chemical intermediate, and chiral building block.

1,2-Diaminocyclohexane

1,2-Diaminocyclohexane is a cycloaliphatic diamine existing as cis and trans stereoisomers. The trans form is a key chiral scaffold in asymmetric catalysis and the carrier ligand for oxaliplatin.

1,2-Dichloroethane

1,2-Dichloroethane, also called ethylene dichloride, is a manufactured chlorinated hydrocarbon, a volatile, colorless, flammable liquid with a chloroform-like odor made in huge volumes to produce vinyl chloride for PVC plastics.

1,2-Dimethoxybenzene

1,2-Dimethoxybenzene, also known as veratrole and pyrocatechol dimethyl ether, is an aromatic compound with two methoxy groups on adjacent benzene positions, used to make vanillin and pharmaceuticals.

1,2-Dimethoxyethane

1,2-Dimethoxyethane, also called monoglyme, glyme, or dimethyl Cellosolve, is a highly flammable liquid diether solvent used in organometallic synthesis and as a lithium battery electrolyte solvent.