Chemical substance

In chemistry, a chemical substance is a form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components by physical separation methods, i.e. without breaking chemical bonds. It can be ...

Polychlorinated biphenyl

A polychlorinated biphenyl is any of the 209 configurations of organochlorides with 1 to 10 chlorine atoms attached to biphenyl, which is a molecule composed of two benzene rings. The chemical formula for a PCB is C12H10-xClx. 130 of the 209 ...

California Department of Toxic Substances Control

The California Department of Toxic Substances Control (or DTSC) is an agency of the government of the state of California. The Mission of the California Department of Toxic Substances Control is to provide the highest level of safety, and to protect ...

Mulch

A mulch is a layer of material applied to the surface of an area of soil. Its purpose is any or all of the following:- to conserve moisture to improve the fertility and health of the soil to reduce weed growth to enhance the visual appeal of the ...

Soft drink

A soft drink (also called soda, pop, coke, soda pop, fizzy drink, tonic, seltzer, mineral, sparkling water, or carbonated beverage) is a beverage that typically contains water (often, but not always carbonated water), usually a sweetener, and ...

Used good

A second-hand or used good is one that is being purchased by or otherwise transferred to a second or later end user. A used good can also simply mean it is no longer in the same condition as it was when it was first transferred to the current end ...

Manufacturing

Manufacturing is the production of goods for use or sale using labor and machines, tools, chemical and biological processing, or formulation. The term may refer to a range of human activity, from handicraft to high tech, but is most commonly applied ...

Styrene

Styrene, also known as vinyl benzene and phenyl ethene, is an organic compound with the chemical formula C6H5CH=CH2. This derivative of benzene is a colorless oily liquid that evaporates easily and has a sweet smell, although high concentrations ...

Ocean

An ocean is a body of saline water that composes a large part of a planet's hydrosphere. In the context of Earth, it refers to one or all of the major divisions of the planet's World Ocean – they are, in descending order of area, the Pacific, ...