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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 - D

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

Decomposition

 A fundamental type of chemical change. In decomposition, one substance breaks down into two or more simpler substances.

Decontamination (radioactive)

 Removal of radioactive poisons from equipment, receptacle, clothing, skin, etc.

Deflagration

 A mode of explosion constituting the very rapid autocombustion of particles of explosive as a surface phenomenon. Initiated by contact of a flame or spark, but may be caused by impact or friction.

Detonation

 The extremely rapid, self-propagating decomposition of an explosive accompanied by a high-pressure and high-temperature wave that moves at from 1,000 to 9,000 metres per second. Detonation may be initiated by mechanical impact, friction or heat.

Diazonium salts

 Compounds which have a structure (-CN2+Z-), where Z- is a radical with the negative charge. Electrons involved in such kinds of bonds have complicated orbits, and are extremely sensitive to additional input of external energy, which makes them capable of breaking the existing bonds. The breaking of the bonds affect the whole molecule, which undergoes spontaneous decomposition.

Diluent

 An ingredient used to reduce the concentration of an active material to achieve a desirable and beneficial effect.

Distillation

 A separation process in which a liquid is converted to vapour and the vapour then condensed to a liquid. This condensed liquid is called the distillate. The usual purpose of distillation is purification.

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