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o-Nitrophenol (2-nitrophenol; OH and NO 2 groups are neighboring, a yellow solid. m-Nitrophenol (3-nitrophenol, CAS number: 554-84-7), a yellow solid (m.p. 97 °C) and precursor to the drug mesalazine (5-aminosalicylic acid). It can be prepared by nitration of aniline followed by replacement of the amino group via its diazonium derivative. [2]
A solution of 4-nitrophenol appears colorless below pH 5.4 and yellow above pH 7.5. [3] This color-changing property makes this compound useful as a pH indicator. The yellow color of the 4-nitrophenolate form (or 4-nitrophenoxide) is due to a maximum of absorbance at 405 nm (ε = 18.3 to 18.4 mM −1 cm −1 in strong alkali). [4]
While several different routes to the 1,3,2,4-dithiadiphosphetane 2,4-disulfides exist the most commonly used is the electrophilic aromatic substitution reaction of an arene with P 4 S 10. An alternative reaction is the reaction of a thiol with P 4 S 10 to form a substance like the Davy reagent. The Davy reagent is identical to Lawesson's ...
2,4-Dinitrophenylhydrazine (2,4-DNPH or DNPH) is the organic compound C 6 H 3 (NO 2) 2 NHNH 2. DNPH is a red to orange solid. It is a substituted hydrazine. The solid is relatively sensitive to shock and friction. For this reason DNPH is usually handled as a wet powder. DNPH is a precursor to the drug Sivifene.
4-Nitroacetanilide is a chemical compound which is a nitro derivative of acetanilide. There are two other isomers of nitroacetanilide, 2-nitroacetanilide and 3-nitroacetanilide. 4-Nitroacetanilide is used as in intermediate in the production of some dyes .
INT (iodonitrotetrazolium or 2-(4-iodophenyl)-3-(4-nitrophenyl)-5-phenyl-2H-tetrazolium) is a commonly used tetrazolium salt (usually prepared with chloride ions), similar to tetrazolium chloride that on reduction produces a red formazan dye that can be used for quantitative redox assays. It is also toxic to prokaryotes.
2-Nitrophenylacetic acid is an organic compound used in organic synthesis that has also been used as an herbicide. It is a derivative of phenylacetic acid , containing a phenyl functional group , a carboxylic acid functional group, and a nitro functional group.
The enzyme 4-nitrophenylphosphatase (EC 3.1.3.41) catalyzes the reaction 4-nitrophenyl phosphate + H 2 O 4-nitrophenol + phosphate. This enzyme belongs to the family of hydrolases, specifically those acting on phosphoric monoester bonds. The systematic name of this enzyme class is 4-nitrophenylphosphate phosphohydrolase.