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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]
with the formula HOC 6 H 4 NO 2.Three isomeric nitrophenols exist: . 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).
The molecular formula C 6 H 5 NO 3 (molar mass: 139.11 g/mol, ... 3-Hydroxypicolinic acid; 4-Nitrophenol This page was last edited on 18 December 2022, at 21: ...
This category has the following 3 subcategories, out of 3 total. D. Dinitrophenol compounds (2 C) N. Nitrophenol derivatives (1 C, 12 P) Nitrophenols (1 C, 4 P)
The following 4 pages are in this category, out of 4 total. This list may not reflect recent changes. Nitrophenol; N. 4-Nitrophenol; P. Picric acid; S. Styphnic acid
This page contains tables of azeotrope data for various binary and ternary mixtures of solvents. The data include the composition of a mixture by weight (in binary azeotropes, when only one fraction is given, it is the fraction of the second component), the boiling point (b.p.) of a component, the boiling point of a mixture, and the specific gravity of the mixture.
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3,4-Dinitrophenol 3,5-Dinitrophenol Dinitrophenols also form the core structure of some herbicides, which are collectively referred to as dinitrophenol herbicides, including: