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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1216 – Revised Recommendations on the Safe Transport of Dangerous Cargoes and Related Activities in Port Areas – (26 February 2007) - Annex - Revised Recommendations on the Safe Transport of Dangerous Cargoes and Related Activities in Port Areas - Appendix 1 - Glossary of Terminology of Relevance to the Handling of Dangerous Cargoes - P

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Parent topic: Appendix 1 - Glossary of Terminology of Relevance to the Handling of Dangerous Cargoes

Pasty substances

 Substances of semisolid consistency and adhesive properties, to some extent.

para (p-), see ortho-

Peroxide

 Any compound containing a bivalent O-O group where one of the oxygen atoms is very loosely bound in the molecule and has a tendency to react with some other substances or form oxygen as a gas (O2). Peroxides are very unstable and may undergo decomposition even at low ambient temperature.

Illustration of the structure:

Hydrogen peroxide H-O-O-H
Organic peroxide R-O-O-R, where R symbolize an organic radical.

Pesticide

 Any substance, organic or inorganic, used to destroy or inhibit the action of plant or animal pests.

Polymerization

 A chemical reaction in which two or more relatively simple molecules (monomers) combine to form a chainlike macromolecule, or polymer.

Pyrophoric

 Descriptive of any substance that ignites spontaneously in air.

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