Pigment Yellow 151 (CAS 31837-42-0) is a high-performance benzimidazolone azo pigment with formula C₁₈H₁₅N₅O₅ and MW 381.35. It provides a brilliant reddish-yellow shade with outstanding thermal stability, lightfastness and weather resistance, and disperses readily in organic media and polymer matrices.
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Solvent Yellow 93 is a pyrazolone-based transparent solvent dye providing a brilliant greenish-yellow shade with exceptional clarity. It offers heat resistance up to 300°C and excellent lightfastness, and exhibits good solubility in engineering plastics for transparent coloring without migration.
4-Nitropyridine N-oxide is a highly reactive pyridine derivative used as a synthetic building block. The electron-withdrawing nitro group combined with the N-oxide motif facilitates nucleophilic aromatic substitution at the 4-position and subsequent ring functionalization.
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Ponceau 2R, also widely known as Acid Red 26, is a classic synthetic azo dye featuring a vibrant reddish-scarlet color profile and excellent water solubility. It exhibits intense tinctorial strength and stable performance across neutral and acidic media, adhering cleanly to substrate surfaces. As a reliable laboratory staining agent and technical dye, it is handled
Fluorescent Brightener 378 (CAS 40470-68-6) is a distyrylbiphenyl-type optical brightener with formula C₃₀H₂₆O₂ and MW 418.53. It absorbs UV light and emits blue fluorescence, masking yellowish tints and enhancing whiteness. It is stable against chlorine bleaching, acids, alkalis and oxygen-based washing agents. Note: the trade name “CBS-X” commonly refers to the disulfonated derivative with CAS
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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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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
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.
