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Chemistry
A branch of physical science that is concerned with the study of matter and energy and how they interact.
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Chemistry > General chemistry 
ethyl (radical, group)
Chemistry; General chemistry
The organic radical (or group) formed by the removal of a single hydrogen atom from ethane (C2H5).
ethylthioethanol
Chemistry; General chemistry
One of a class of sulphur-containing compounds used widely in the synthesis of pesticides.
sublimate
Chemistry; General chemistry
A solid obtained by the condensation of vapor without passing through the liquid state.
polyphenylene sulphide
Chemistry; General chemistry
An engineering plastic with excellent resistance to most chemicals.
sulpholene
Chemistry; General chemistry
A cyclic addition compound of butadiene and sulphur dioxide which can be hydrogenated to produce sulpholane.
heavy fractions, or heavy ends
Chemistry; General chemistry
The high-molecular-weight, high-boilingpoint fractions that emerge from the lower part of a fractionating column during the oil refining process.
intermediate chemicals
Chemistry; General chemistry
Chemicals which are derived from basic petrochemicals and are themselves used to manufacture other chemicals or products.
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