Ammonia is a colourless acrid-smelling gas at room temperature and normal atmospheric pressure. Most people can identify its odour at 35 mg/rn3 in air. It can be stored and transported as a liquid at a pressure of 10 ...

Dimethylformamide (DMF) is a colourless liquid with only a slight, unpleasant odour; smell is, therefore, not a useful warning signal. DMF is usually stable but, when it comes into contact with strong oxidizers, halogens, ...

Barium is an alkaline earth metal that occurs in nature in a combined form. It is present in rocks, minerals, soils, air, natural waters, and fossil fuels. Some barium salts (e.g., acetate, nitrate, and chloride) are quite ...

Pure paraquat salts are white and the technical products, yellow. They are crystalline, odourless, hygroscopic powders. Paraqual is slightly soluble in alcohol and practically insoluble in organic solvents. Paraquat is ...

Mirex is a white crystalline, odourless solid with a melting point of 485 °C. It is soluble in several organic solvents including tetrahydrofuran (30%), carbon disulfide (18%), chloroform (17%), and benzene (12%), but is ...

Lindane is a white, crystalline solid, with a weak, or no, odour (the characteristic smell of technical HCH is attributed to the impurities, particularly heptachlorocyclohexane). Lindane is stable to light, air, heat, ...

1,2-Dichioroethane is a colourless liquid, with a sweet taste aid a chloroform-like odour. Reportd odour thresholds are 25-450 mg/ni for perception and 162-750 mg/rn for recognition. 1,2-Dichiorethane is a volatile and ...

MIBK is a clear liquid with a sweet odour; the odour threshold is 1.64 mg/m3 (0.4 ppm). It is moderately soluble in water. MIBK can react violently with oxidizing and reducing agents. When heated, peroxides may form by ...

Formaldehyde is a flammable, colourless, reactive, and readily polymerized gas at normal temperature and pressure. The heat of combustion for formaldehyde gas is 4.47 kcal/g. It forms explosive mixtures with air and oxygen ...

Pure hexachiorocyclopentadiene (HEX) is a light, lemon-yellow liquid that has a pungent, musty odour. The odour threshold is reported to be 0.0014-0.0016 mg/m3. HEX is highly reactive and volatile at low temperatures. ...