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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 - H

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

Halogen

 One of the chemically related elements, fluorine, chlorine, bromine, iodine and astatine.

Halogenated hydrocarbons

 A hydrocarbon in which one or more atoms of hydrogen is replaced by a halogen or halogens.

Heavy metal

  (1) Metal of relative density 5 and over.

  (2) A metal of atomic weight greater than sodium (22.9) that forms soaps on reaction with fatty acids, e.g., aluminium, lead, cobalt.

 Heavy metal soaps (loosely called metallic soaps) are those formed by metals heavier than sodium (aluminium, calcium, cobalt, lead, and zinc). These soaps are not water-soluble; specific types are used in lubricating greases, gel thickeners, and in paints as driers and flatting agents.

Hydrocarbon gas

 A gas composed entirely of hydrocarbons.

Hydrocarbons

 Organic compounds consisting exclusively of the elements carbon and hydrogen.

Hydrocarbons, halogenated

 Hydrocarbons in which one or more hydrogen atoms have been replaced by fluorine (F), chlorine (Cl), bromine (Br) or iodine (I).

Hydroxides

 A large group of compounds consisting of ions of metal or non-metal and ions of oxygen and hydrogen.

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