Chemical Products

1,4-Diamino-2,3-dicyanoanthraquinone is an anthraquinone bearing two amino and two cyano substituents, supplied as a dark blue to black powder at 98% purity. The four substituents withdraw and donate electron density in opposition, producing a deep blue chromophore while leaving the nitrile groups available for hydrolysis or cyclisation and the amino groups available for acylation and

1,8-Dihydroxy-4,5-Dinitroanthraquinone is a chrysazin derivative carrying two nitro groups ortho to the hydroxyls, supplied as a yellow to orange powder at 98% purity. The two nitro groups make the adjacent hydroxyl protons strongly acidic and the aromatic ring highly electron-deficient, so the molecule forms deeply coloured salts and readily undergoes nucleophilic substitution. These features make

1,8-Naphthalimide is the cyclic imide formed from 1,8-naphthalenedicarboxylic acid and ammonia, supplied as a white to off-white crystalline powder at 98% purity. The planar naphthalimide core is strongly fluorescent, thermally robust and easy to functionalise at the imide nitrogen or at the aromatic ring, which allows its optical properties to be tuned over a wide

Diazinon (CAS: 333-41-5) is an organophosphate insecticide and acaricide supplied as a colorless to pale brown liquid. It is used as an active ingredient and analytical reference material. It acts by inhibiting acetylcholinesterase, and is soluble in most organic solvents and slightly in water. Use is regulated in many countries, so buyers should confirm local

Orthanilic Acid (CAS: 88-21-1), or 2-aminobenzenesulfonic acid, is an aromatic amino-sulfonic acid used mainly as a diazo component in azo dye synthesis. It exists as a zwitterion and is a white to grey crystalline powder, slightly soluble in water. It is also used to make metal-complex dyes, optical brighteners and certain pharmaceutical intermediates. It is

N-Ethyl-N-hydroxyethyl-m-toluidine is a tertiary aromatic amine containing an ethyl group and a hydroxyethyl group, supplied as a colourless to pale yellow clear liquid at 99% purity. The hydroxyl group can be esterified, etherified or reacted with isocyanates, while the aromatic amine provides a strong electron donor that develops deep colour on oxidative coupling. Because the

N-Methyl-N-hydroxyethylaniline is a tertiary amine combining an N-methyl aniline core with a primary alcohol, supplied as a colourless to pale yellow clear liquid at 99% purity. The two functional ends work independently: the aromatic nitrogen is an electron donor that participates in electrophilic substitution and oxidative coupling, while the terminal hydroxyl group can be esterified,

Fluorescein Sodium (CAS: 518-47-8), also called uranine, is the water-soluble sodium salt of fluorescein, a classic fluorescent dye with intense yellow-green emission. It is supplied as an orange-red powder that dissolves in water to give strongly fluorescent solutions, even at very low concentrations. It is widely used as a tracer, a marker and a colorant

1,4-Diaminoanthraquinone (CAS: 128-95-0) is an anthraquinone dye also known as Disperse Violet 1. It gives bright violet shades with good lightfastness. It is a dye in its own right and an intermediate for blue and green anthraquinone dyes made by arylation, alkylation or sulfonation. It is supplied as a violet to dark purple powder that

1,4-Diamino-2,3-dihydroanthraquinone is a partially reduced anthraquinone bearing two amino groups, supplied as a dark violet to black powder at 98% purity. The molecule sits between the fully aromatic quinone and its leuco form: the saturated 2,3-positions interrupt conjugation, shifting the colour from deep blue to violet, and the two amino groups make it reactive towards

Quinizarin (CAS: 81-64-1), or 1,4-dihydroxyanthraquinone, is an orange-red anthraquinone compound used as a dye intermediate and analytical reagent. It is the starting point for many anthraquinone dyes including 1,4-diaminoanthraquinones and arylamino derivatives, and it forms coloured complexes with metal ions such as boron and aluminium. It is also used for colouring plastics, oils and fuels

1,8-Naphthalic Anhydride (CAS: 81-84-5) is a cyclic aromatic anhydride that is a key intermediate for fluorescent dyes, optical brighteners and herbicide safeners. Its reactive anhydride ring condenses easily with amines to form naphthalimides, which are strongly fluorescent and highly stable. Typical buyers need low acenaphthene and acid impurities to maintain colour and fluorescence quality. It