Hives are red and sometimes itchy bumps on your skin. An allergic reaction to a drug or food usually causes them. Allergic reactions cause your body to release chemicals that can make your skin swell up in hives. People who have other allergies are more likely to get hives than other people. Other causes include infections and stress.
hydroxyl amine. It is freely soluble in water. Chemically it is a reducing agent and hence it oxidizes. It reduces ferric ion and converts into ferrous ion. Thermally in presence of water, it decomposes . The details of the above chemical properties with reference to high temperature systems are discussed here.
The green sediment was filtered, rinsed with a 1 mol L -1 HCl solution and dried under dynamic vacuum at room temperature for 72 h. Under these conditions the polymer 20obtained is in a doped state (PAni-HCl) slightly soluble in water[21]. 2.2. Synthesis of Polyaniline Doped with Formic A cid (HCOOH) Aniline was polymerized in formic acid (HCOOH) me-dium using (NH 4) 2 S 2 O 8 as oxidizing agent. In a typical procedure, 1 mL (0.