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Now showing items 21-30 of 64
Formaldehyde Health and Safety Guide - Health and Safety Guide 57
(1991)
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 ...
Polychlorinated Biphenyls (PCBs) and Polychlorinated Terphenyls (PCTs) Health and Safety Guide 68
(1992)
The PCBs are chlorinated hydrocarbons that are manufactured commercially by the progressive chlorination of biphenyl in the presence of a suitable catalyst (e.g., iron chloride). Depending on the reaction conditions, the ...
Trichlorfon Health and Safety Guide - Health and Safety Guide 66
(1991)
Trichlorfon is a colourless crystalline powder that is stable at room temperature. It is slowly hydrolysed in acid media; the half-life is 526 days at pH 1-5 and 20°C. In alkaline media, at pH 8 and 37.5 °C, it hydrolyses ...
Aldicarb Health and Safety Guide - Health and Safety Guide 64
(1991)
Aldicarb has a slight sulfur smell. It has a melting point of 100 °C and a specific gravity of 1.195 at 25 °C. it is soluble in water, sensitive to heat, and relatively unstable. Analytical methods for aldicarb include ...
Inorganic Arsenic Compounds other than Arsine Health and Safety Guide - Health and Safety Guide 70
(1992)
Arsenic compounds are often unstable, and in many cases are not well defined materials. For example, the arsenites of the alkali metals are slowly converted in solution to arsenates, by atmospheric oxygen. Arsenic trisulfide ...
Rotenone Health and Safety Guide - Health and Safety Guide 73
(1992)
Rotenone is a naturally occurring chemical with insecticidal and piscicidal properties obtained from the roots of several tropical and subtropical plant species belonging to genus Lonchcarpus or Derris. Rotenone is a ...
Trimellitic Anhydride Health and Safety Guide - Health and Safety Guide 71
(1992)
Trimellitic anhydride is a white solid in the firm of flakes. It is readily hydrolysed in water to trimellitic acid, which is moderately soluble in water. Trimellitic anhydride is readily soluble in acetone, cyclohexanone, ...
Endemic Fluorosis: A Global Health Issue - A Technical Report for the Human Assessment Locations Project
(1992)
Fluoride is one of the essential trace elements, a lack of which is manifested as dental caries throughout many parts of the world, yet excess fluoride is responsible for more serious disease (WHO, 1984b).
1, 3-Dichloropropene, 1, 2-Diciiloropropane and Mixtures Health and Safety Guide 76
(1992)
Commercial 1,3-dichioropropene is a mixture of cis- and trans- isomers and 92% pure. It may also be used in admixtures with 1 ,2-dibromoethane (Dorloe) or with 1 ,2dichloropropane (D-D , soil fumigant; Nemex Telone , and ...
Methyl Parathion Health and Safety Guide - Health and Safety Guide 75
(1992)
Pure methyl parathion is crystalline and white. It is relatively insoluble in water, poorly soluble in petroleum ether and mineral oils, and readily soluble in most organic solvents. Methyl parathion is stable at pH 1-7, ...