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A substance such as hydrogen, deuterium, oxygen or paraffin capable of slowing fast nuetrons upon collision.

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Photochemical Oxidants

Photochemically produced oxidizing agents capable of causing damage to plants and animals.

Phase Diagram

Diagram that shows equilibrium temperature-pressure relationships for different phases of a substance.

Melting Point

The temperature at which liquid and solid coexist in equilibrium, also the freezing point.

Surface Tension

It is the force in dynes acting along the surface of the liquid 1cm in length and perpendicular to it.

Intermolecular Forces

Forces between individual particles (atoms, molecules, ions) of a substance.

Polyene

A compound that contains more than one double bond per molecule.

Chemical Hygiene Officer (CHO)

A person or employee who is qualified by training or experience to provide technical guidance in the development and implementations of the provisions of a Chemical Hygiene Plan (CHP)

Enantiomer

One of the two mirror-image forms of an optically active molecule.

Solvolysis

The reaction of a substance with the solvent in which it is dissolved.

Standard Electrode Potential

By convention, potential, Eo, of a half-reaction as a reduction relative to the standard hydrogen electrode when all species are present at unit activity.