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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 - N

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

n-

 Abbreviation for normal. If hydrocarbon molecules are structured as a straight chain of carbon atoms, it is indicated by the abbreviation n-.

Nitrates

 These are salts of the nitric acid (HNO3). Uses of nitrates are: manufacture of ammonium nitrate for fertilizer and explosives; organic synthesis (dyes, drugs, explosives, cellulose nitrate, nitrate salts); metallurgy, photoengraving; etching steel; ore flotation; medicine.

Nitrocellulose

 Synonyms: cellulose nitrate; nitrocotton; guncotton; pyroxylin. Formula approximately C6H7O2(ONO2)3. Contains from 10 to 14% nitrogen. Derivation: treatment of cellulose with mixture of nitric and sulphuric acids. Hazard: highly flammable; dangerous fire and explosion risk.

N-nitroso compounds

 Compounds which have quite unstable, so called, N-nitroso group in the structure (-N-N=O). 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 affects the whole molecule, which undergoes spontaneous decomposition.

Nuclide

 This is a particular species of atom, characterized by the mass, the charge (number of protons), and the energy content of its nucleus. A radionuclide is a radioactive nuclide.

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