Tetrasodium 1,3,6,8-pyrenetetrasulfonate is a fully sulfonated pyrene derivative, supplied as a pale yellow to greenish-yellow powder at 98% purity. The four sulfonate groups make the molecule extremely water-soluble and chemically inert under most industrial conditions, while the pyrene core retains a distinctive fluorescence that can be detected at very low concentrations. Because the fluorescence is
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2-Naphthol (CAS: 135-19-3) is a naphthalene derivative with a hydroxyl group at the 2-position, supplied as white to pale yellow flakes or powder with a faint phenolic odor. It dissolves in alkali, alcohol and ether and is a basic raw material for azo pigments, dyes, antioxidants and pharmaceuticals. Reliable colour, assay and low 1-naphthol content
Tannic acid (CAS 1401-55-4) is a plant-derived polyphenol mixture, predominantly a gallotannin. While C₇₆H₅₂O₄₆ (MW 1701.21) is commonly cited for the principal component, commercial material is a mixture whose composition varies by botanical source and grade; specifications rely on tannin content, clarity and colour.
N-Benzyl-N-ethylaniline (CAS: 92-59-1) is a tertiary aromatic amine used mainly as an intermediate for triarylmethane dyes and other colorants. It is a pale yellow to brown liquid, insoluble in water but soluble in common organic solvents. After condensation with sulfonated benzaldehydes it forms brilliant acid and basic dyes. Dye manufacturers value consistent purity and low
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N-Ethyl-m-toluidine (CAS: 102-27-2) is a secondary aromatic amine supplied as a colorless to light brown liquid that darkens on storage. It is a standard intermediate in the dye and pigment industry. Its reactive nitrogen and activated ring make it a useful coupling component for azo and fluoran dyes. It also supports the production of thermal-paper
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N-Ethylaniline (CAS: 103-69-5) is a secondary aromatic amine supplied as a colorless to yellow-brown liquid. It is widely used in dyes, pesticides and pharmaceutical intermediates. It is slightly soluble in water, miscible with common organic solvents and sensitive to air and light, so it is normally stored in tightly closed containers. Typical buyers need low
N,N-Dimethylaniline (CAS: 121-69-7) is a tertiary aromatic amine supplied as a colorless to pale yellow oily liquid that darkens on exposure to air and light. It is a versatile intermediate and accelerator. It is used to prepare dyes such as crystal violet and malachite green, as well as vanillin, pharmaceuticals and agrochemicals. In polymer chemistry
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p-Toluidine (CAS: 106-49-0) is an aromatic amine with a methyl group para to the amino group, supplied as white to light brown crystalline flakes. It is an essential dye and pigment intermediate. It is soluble in ethanol and ether and slightly soluble in water, and it must be stored away from light and air to
Pd(dppf)Cl2 (CAS: 72287-26-4), the palladium(II) dichloride complex of 1,1′-bis(diphenylphosphino)ferrocene, is a robust, air-stable catalyst for cross-coupling reactions. The wide bite angle of the dppf ligand gives strong activity and selectivity, particularly for Suzuki-Miyaura couplings of aryl halides and boronic acids and for borylation reactions. It is widely used in pharmaceutical process chemistry and in the
Naphthalene (CAS: 91-20-3) is the simplest polycyclic aromatic hydrocarbon, supplied as white crystalline flakes or balls with a characteristic odor. It is obtained mainly from coal tar and petroleum. It is largely consumed as a feedstock for phthalic anhydride and for naphthalene sulfonate derivatives, and is a basic raw material for dyes, resins and agrochemicals.
3-Hydroxy-2-Naphthoic Acid (CAS: 92-70-6), commonly called BON acid, is a key intermediate for azo pigments and dyes. It is a yellow to light brown crystalline powder that dissolves in alkaline solutions. It is the starting point for Naphthol AS coupling components, which are condensed with aromatic amines to give the naphthol AS family used in
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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
