Dangerous goods classification
Dangerous goods may be pure chemicals, mixtures of substances, manufactured products or articles which can pose a risk to people, animals or the environment if not properly handled in use or in transport
Metric and Imperial Conversion Charts
The metric system originated in France in 1799 although decimal units had been used in many other countries and cultures previously. Although there have been many different measurements and the definitions of the units have been revised, the official system of measurements of most countries is the modern form of the metric system which is known as the "International System of Units". The U.S.A, Liberia, and Burma use the Imperial System.