iodonitrophenols

pl. [Pref. iodo-; nitric acid); o connective, and Eng. phenol (q. v.).] Chem.: Compounds formed by the action of iodine and iodic-acid on the nitro phenols in alkaline solutions, and precipitating from these solutions by hydrochloric acid. Mono-iodonitrophenol has a golden yellow color, and crystallizes readily, but has not been further examined. Di-iodonitrophenol is slightly soluble in water, but very soluble in alcohol and ether, and melts at 98°. It crystallizes from a mixture of alcohol and ether in dark yellow needles. Its pota ium salt crystallizes in reddish needles, and its sodium salt in dark-brown prisms, having a golden luster. i-ô-đô-phê-nõlş, s. pl. [Pref. iodo-, and Eng. phenol (q. v.).]. Chem. CHIOH. By the action of iodine and iodic acid on phenol, in presence of an alkali, a mixture of three isomeric mono-iodophenols is obtained. When this is distilled in a current of steam, first a liquid, ortho-iodophenol, pa es over, then a solid, meta-iodophenol, and lastly, at a higher temperature, tri-iodo-, or para-iodophenol. The residue still contains a quantity of tri-iodophenol, which, however, may be extracted by alcohol. Ortho-iodophenol is a colorle , oily liquid, with a strong, disagreeable odor. It does not become solid even at -23°, and is readily decomposed by chlorine, or by nitric acid. Meta-iodophenol is almost insoluble in water, but alcohol and ether, from which it crystallizes in flat glistening needles. It melts at 64°-66°. Para-iodophenol is soluble in water, alcohol, ether, and carbon disul phide. It crystallizes from alcohol in large sixsided plates, from ether in the form of needles, and from carbon disulphide in short, thick prisms, From its aqueous solution it is precipitated by hydrochloric acid, as a grayish-white flocculent ma . It has a faint but unpleasant odor, and melts at 89°. i-o-do-pro-pi-on'-ic, a . [Pref. iodo-; propion(e), and suff. ic .] Chem.: Composed of iodine and propionic-acid. iodopropionic-acid, s . Chem.: C3H5IO2. A monobasic acid, obtained by heating glyceric acid in syrupy solution with phosphorous iodide, or by heating acrylic acid and a solution of hydriodic acid to a temperature of 120°. C3H4O2+HI=C3H5IO2. It crystallizes in large col orle plates, which melt at 82, and are insoluble in cold, readily in hot, water. When heated to 180° with concentrated hydriodic acid, it is converted into propionic acid.