N-(3-Chloro-4-fluorophenyl)thiourea is a thiourea derivative carrying chlorine and fluorine on the aromatic ring, supplied as a white to off-white crystalline powder at 98% purity. The halogen pair tunes both the electron density of the ring and the lipophilicity of the molecule, while the thiourea group provides hydrogen-bond donors and a sulfur chelation site. This profile
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Tetra-tert-butylphenoxyperylene dianhydride is a perylene tetracarboxylic dianhydride in which four bulky aryloxy groups replace the ring hydrogens, supplied as a red to dark red powder at 98% purity. The bulky tert-butylphenoxy substituents twist the molecule out of planarity, which suppresses aggregation and improves solubility in organic solvents, while the perylene core still provides intense orange-red
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N-(4-Trifluoromethylphenyl)thiourea is a thiourea bearing a trifluoromethyl group on the aromatic ring, supplied as a white crystalline powder at 98% purity. The trifluoromethyl group is strongly electron-withdrawing and highly lipophilic, which raises the acidity of the thiourea protons, strengthens hydrogen bonding and improves membrane permeability; the sulfur atom remains an effective metal-binding site. These properties
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Fluorescent Brightener OB-2 is a bis(benzoxazolyl)stilbene derivative with two methyl substituents, supplied as a pale yellow powder at 98% purity. The extended stilbene-benzoxazole conjugation absorbs ultraviolet radiation and emits intense blue fluorescence, and the methyl groups raise the melting point and reduce volatility, improving performance in high-temperature polymer processing. It is one of the most
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Titanyl phthalocyanine is a titanium-oxygen phthalocyanine in which a Ti=O unit sits at the centre of the macrocycle, supplied as a blue to dark blue powder at 98% purity. The titanyl centre gives the molecule strong absorption across the visible and near-infrared range and, in the correct crystal phase, very high photoconductivity and charge-generation efficiency.
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Fluorescent Brightener 185 is a benzoxazolyl-thiophene optical brightener, supplied as a pale yellow powder at 98% purity. The molecule absorbs ultraviolet light and emits an intense blue fluorescence, and its rigid, sulfur-containing heteroaromatic core gives it exceptional heat stability and resistance to sublimation. Those properties make it the preferred brightener for polyester, where high processing
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Fluorescent Brightener ER-II is a cyano-substituted distyrylbenzene optical brightener, supplied as a pale yellow crystalline powder at 98% purity. The stilbene-type conjugation absorbs in the ultraviolet and fluoresces blue, offsetting the yellowish tint of aged or thermally treated textiles, and the two cyano groups push the emission towards the violet-blue region for a cooler white.
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1,4-Bis(2-cyanostyryl)benzene is a symmetric distyrylbenzene optical brightener with the cyano groups in the ortho position, supplied as a pale yellow crystalline powder at 98% purity. The ortho arrangement of the cyano groups gives a more twisted, less planar conformation than the para isomer, which raises the melting point, lowers solubility and improves resistance to sublimation.
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Zinc phthalocyanine is a metal-containing phthalocyanine in which a zinc ion sits at the centre of the macrocyclic ring, supplied as a blue to dark blue powder at 95% purity. The zinc centre enhances light absorption in the red region and improves photoconductivity and fluorescence compared with the metal-free compound, while the rigid phthalocyanine framework
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1-Chloroanthraquinone is an anthraquinone with a single chlorine atom at the 1-position, supplied as a light yellow crystalline powder at 98% purity. The chlorine sits at an activated position, so it is displaced cleanly by amines, phenols and thiols, turning this inexpensive building block into a wide range of amino-, aryloxy- and thio-substituted anthraquinones. The
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3-Chloro-4-methylaniline (CAS: 95-74-9) is a chlorinated aromatic amine used as an intermediate in agrochemicals, dyes and pharmaceuticals. The amino, chloro and methyl groups give it versatile reactivity for diazotisation, acylation and urea formation. It is supplied as an off-white to brown low-melting solid and is notably the intermediate for the herbicide chlorotoluron. It is a
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4-Nonylphenol (CAS: 104-40-5) is an alkylphenol with a nine-carbon chain para to the hydroxyl group. It is used as an intermediate for nonionic surfactants and resin modifiers. It is practically insoluble in water and soluble in most organic solvents. Because nonylphenol is regulated in some regions, buyers should check local restrictions before use. It should
N-(3,4-Dichlorophenyl)thiourea is a substituted thiourea with two chlorine atoms on the aromatic ring, supplied as a white to off-white crystalline powder at 98% purity. The thiourea group offers two nucleophilic nitrogen atoms and a sulfur donor, giving the molecule strong chelating and hydrogen-bonding ability, while the dichlorophenyl ring adds lipophilicity and a site for further
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Anthraquinone (CAS: 84-65-1) is the parent compound of the anthraquinone family, supplied as a light yellow crystalline powder. It is very stable and nearly insoluble in water. It is the basic raw material for anthraquinone dyes and is widely used as a digester additive in alkaline pulping, where it speeds delignification and increases pulp yield.
Hydrazobenzene (CAS: 122-66-7), or 1,2-diphenylhydrazine, is an aromatic hydrazine supplied as a pale yellow to light tan crystalline powder. It oxidises readily to azobenzene and rearranges under acid conditions to benzidine, so it must be stored cool and protected from air. It is mainly an intermediate for pharmaceutical and dye synthesis. It is air- and
Reactive Red 24 is a monochlorotriazine reactive dye based on a sulfonated naphthylazo chromophore, supplied as a red to dark red powder at 95% dye content. The molecule carries three sulfonate groups for water solubility and a chlorotriazine ring that reacts covalently with the hydroxyl groups of cellulose under alkaline conditions. Once fixed, the dye
