Corosolic acid is a pentacyclic triterpenoid acid isolated from Lagerstroemia speciosa (banaba) and other plant sources, supplied as a white to off-white crystalline powder at 98% purity. The molecule carries a hydroxyl group at the 2-position of the ursane skeleton together with a carboxylic acid, a combination that gives it strong lipophilicity, good crystallinity and
Ethyl Thiocyanate (CAS: 542-90-5) is a small organosulfur liquid containing the reactive thiocyanate group. It is used as an alkylating and sulfur-transfer intermediate in fine-chemical synthesis. The compound is a colorless to pale yellow liquid with a characteristic pungent odor, miscible with common organic solvents, and is handled under ventilation and with suitable protective equipment.
1-Pentadecanol (CAS: 629-76-5) is a straight-chain C15 fatty alcohol supplied as a white waxy solid or flakes. It is practically insoluble in water and dissolves in ethanol and oils. Its long hydrophobic chain gives good emolliency, thickening and consistency-building properties, so it is used in personal care emulsions and as a raw material for esters
Karstedt’s catalyst is a platinum(0) complex of 1,3-divinyl-1,1,3,3-tetramethyldisiloxane, normally supplied as a solution containing about 2% platinum. The platinum centre is stabilised by two vinylsiloxane ligands, giving a highly active homogeneous hydrosilylation catalyst compatible with silicone systems.
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Murexide, the ammonium salt of purpuric acid, is a purple-red to reddish-brown powder supplied at 95% purity as a classical analytical reagent. Its colour depends on the metal ions present and on pH: the free indicator is violet, turns yellow-green in acidic media and gives stable, strongly coloured complexes with calcium, copper, nickel and other
Butylferrocene is an iron sandwich compound in which one cyclopentadienyl ring carries an n-butyl substituent, supplied as an orange to brown clear liquid at 98% purity. The ferrocene core provides a reversible one-electron redox couple, thermal stability and a lipophilic, low-toxicity organometallic skeleton, while the butyl chain improves solubility in hydrocarbons and polymers. These properties
Nalidixic Acid (CAS: 389-08-2) is a synthetic quinolone-class antibacterial compound and the first of the quinolone family. It acts by inhibiting bacterial DNA gyrase. It appears as a white to pale yellow crystalline powder, sparingly soluble in water and soluble in alkaline solutions and some organic solvents. Today it is used mainly as a pharmaceutical
Lasalocid sodium is the sodium salt of a polyether carboxylic acid ionophore produced by fermentation, supplied as an off-white to pale yellow powder at 90% assay. The molecule wraps around monovalent and divalent cations and shuttles them across lipid membranes, which disturbs the ion balance of sensitive microorganisms and improves nutrient utilisation in the animal
Polyamine N7 is a water-soluble cationic polyamine obtained by copolymerisation of ammonia with 1,2-dichloroethane, normally supplied as a 50% aqueous solution. The polymer has a distribution of chain lengths; the repeat unit is commonly represented as (C₂H₄Cl₂·H₃N)x. Protonated amine groups adsorb strongly onto negatively charged surfaces.
Triphenyltetrazolium chloride is a water-soluble tetrazolium salt, supplied as a white to pale yellow crystalline powder at 98% purity. In living tissues the colourless salt is reduced by dehydrogenase activity to formazan, an intensely red, water-insoluble pigment, so the intensity of the colour reports directly on metabolic activity and cell viability. This simple, robust chemistry
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Tetrakis(triphenylphosphine)palladium(0) (CAS: 14221-01-3) is a ready-to-use zero-valent palladium complex and one of the most widely applied catalysts for carbon-carbon and carbon-heteroatom bond formation. As a pre-formed palladium(0) source it initiates reactions without an activation step, giving dependable performance in Suzuki, Stille, Sonogashira, Heck and Negishi couplings. The yellow crystalline solid is sensitive to air, light
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Zr(TMHD)4 is the tetrakis(2,2,6,6-tetramethyl-3,5-heptanedionato) complex of zirconium, a white to off-white crystalline powder of 99% purity. The four bulky β-diketonate ligands shield the metal centre and make the complex volatile and thermally stable enough to be transported in the gas phase, while remaining cleanly decomposable to zirconium oxide. This balance of volatility and stability is
Grubbs Catalyst 2nd Generation (CAS: 246047-72-3) is a ruthenium carbene complex bearing an N-heterocyclic carbene ligand, developed for olefin metathesis. Compared with first-generation systems it offers higher activity, better tolerance of functional groups and improved thermal stability, and it is handled in air as a solid with reasonable convenience. It is used for ring-closing, cross
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Ethyl 2-nitropropionate is the ethyl ester of 2-nitropropionic acid, supplied as a colourless to pale yellow clear liquid at 98% purity. The molecule combines an acidic α-hydrogen with a strong electron-withdrawing nitro group, giving it high reactivity in Michael additions, alkylations and condensations, where the nitro group can later be reduced, displaced or converted into
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Bromophenol Blue (CAS: 115-39-9) is a sulfonphthalein dye widely used as a pH indicator and tracking dye in laboratories. It changes from yellow at about pH 3.0 to blue-violet at about pH 4.6. Because it is stable, strongly coloured and easy to dissolve in dilute alkali or ethanol, it is a routine choice for titration,
Bis(triphenylphosphine)palladium(II) Dichloride (CAS: 13965-03-2) is an air-stable palladium(II) phosphine complex used as a homogeneous catalyst precursor in modern cross-coupling chemistry. It is easy to handle compared with many palladium(0) sources and is reduced in situ to the active catalytic species, which makes it a practical choice for both laboratory and production-scale work. The complex is
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