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1、Physical data is displayed for 10%, 30% and 50% aqueous sodium hydroxide solutions. (Merck Index). Appearance: Clear, colorless solution. Odor: Odorless. Solubility: Completely miscible with water. Density: 10% solution - 1.11; 30% solution - 1.33; 50% solution - 1.53 pH: 14.0 (10%, 30% and 50% solutions) % Volatiles by volume @ 21C (70F): No information found. Boiling Point: For 10% solution = 105C (221F); for 30% solution = 115C (239F); for 50% solution = 140C (284F). Melting Point: For 10% solution = -10C (14 F); for 30% solution = 1C (34F); for 50% solution = 12C (53.6F). Vapor Density (Air=1): No information found. Vapor Pressure (mm Hg): 13 @ 60C (140F) (50% solution) Evaporation Rate (BuAc=1): No information found.。
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