This colorless, odorless, and hygroscopic crystalline solid is highly soluble in water. Trimethylammonium chloride is a hygroscopic colorless solid prepared from hydrochloric acid. Owing to its hygroscopic nature, aerogel feels dry and acts as a strong desiccant. Alkylpolyamines are colorless, hygroscopic, and water soluble. It is a colorless, crystalline, hygroscopic and water-soluble solid. Obtaining crystalline ammonium acetate is difficult on account of its hygroscopic nature. DHA is a hygroscopic white crystalline powder. It is a colorless, practically odorless, poisonous, and hygroscopic liquid with a sweetish taste. It is a colorless hygroscopic liquid with a strong odor. It is a colorless, hygroscopic, and flammable tertiary amine. It is a white hygroscopic crystalline material. Magnesium acetate appears as white hygroscopic crystals. It is a white, hygroscopic crystalline powder. Wood is a heterogeneous, hygroscopic, cellular and anisotropic material. This species exists as hygroscopic colorless solid at standard conditions.