Hazardous and Noxious Substances Spill Incidents

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On this database it is collected information on the fate and weathering of hazardous and noxious substances (HNS) accidentally spilt at the sea around the world. It gathers and systematizes existing information to assist stakeholders involved in spill preparedness and response, and builds return of experience datasheets for the chemicals involved. It will facilitate the incorporation of lessons from past incidents on the decision process to improve preparedness.

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HNS Spilt



Amount Spilt (T)126000

CAS Number7440-23-5


Physical Behaviour (SEBC code)


Pollution Category (MARPOL Annex 2)


Class according to IMDG code


Subsidiary Risk Class according to IMDG code

Classification as Marine Pollutant


HNS Classification (2010 HNS Convention)

Fate and weathering facts observed/reported

The cargo was full of HNS (including diphenyl methane, di-isocyanate, o-cresol, aniline) but only sodium spilled. Sodium is a are very reactive metals which floats and reacts violently with water, forming flammable hydrogen gas mixtures with air. The heat of the reaction often causes the hydrogen to ignite and explode. The ship went on fire when the containers filled with sodium on the deck cargo came into contact with seawater. On board there were 126 tons of sodium in 1430 drums.

Material Safety Data Sheets (MSDS)