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i) CDG UN No. Number of the United Nations
ii) Table number categorised by the J.G. on the attached sheets.
This is a table number in the “Regulation for carrying dangerous goods and their storage “
1. Powders
2. High pressure gases
3. Corrosive substances
4. Toxic substances
5. Flammable liquid
6. Substance becoming dangerous by reacting on water or air
7. Easily oxidizable substances
8. Inflammable solid
9.1. Noxious substances
9.2. Organised peroxide
10. Dangerous goods used always

iii) Guidelines for the categorisation of noxious liquid substances.

Categorization and listing of noxious liquid substances and other substances

For the purpose of the regulations of this Annex, noxious liquid
substances shall be divided into four categories as follows:

1. Category X:

Noxious liquid substances which, if discharged into the sea from tank cleaning or deballasting operations, are deemed to present a major hazard to either marine resources or human health and, therefore, justify the prohibition of the discharge into the marine environment;

2. Category Y:

Noxious liquid substances which, if discharged into the sea from tank cleaning or deballasting operations, are deemed to present a hazard to either marine resources or human health or cause harm to amenities or other legitimate uses of the sea and therefore justify a limitation on the quality and quantity of the discharge into the marine environment;

3. Category Z:
Noxious liquid substances which, if discharged into the sea from tank cleaning or deballasting operations, are deemed to present a minor hazard to either marine resources or human health and therefore justify less stringent restrictions on the quality and quantity of the discharge into the marine environment;

4. Other substances:
Substances indicated as OS (Other Substances) in the pollution category column of chapter 18 of the International Bulk Chemical Code which have been evaluated and found to fall outside category X, Y or Z as defined in regulation 6.1 of this Annex because they are, at present, considered to present no harm to marine resources, human health, amenities or other legitimate uses of the sea when discharged into the sea from tank cleaning or deballasting operations. The discharge of bilge or ballast water or other residues or mixtures containing only substances referred to as“Other Substances” shall not be subject to any requirements of the Annex.

IMDG CODE CLASS
Classes in the International Maritime Dangerous Goods Code are as follows:

Class 1 - Explosives
Division 1.1 Explosives with a mass explosion hazard
Division 1.2 Explosives with a projection hazard
Division 1.3 Explosives with predominantly a fire hazard
Division 1.4 Explosives with no significant blast hazard
Division 1.5 Very insensitive explosives with a mass explosion hazard
Division 1.6 Extremely insensitive articles
Class 2 - Gases
Division 2.1 Flammable gases
Division 2.2 Non-flammable, non-toxic* gases
Division 2.3 Toxic* gases
Class 3 - Flammable liquids (and Combustible liquids [U.S.])
Class 4 - Flammable solids; spontaneously combustible materials; and Dangerous when wet Materials/Water-reactive substances
Division 4.1 Flammable solids
Division 4.2 Spontaneously combustible materials
Division 4.3 Water-reactive substances/Dangerous when wet materials
Class 5 - Oxidizing substances and Organic peroxides
Division 5.1 Oxidizing substances
Division 5.2 Organic peroxides
Class 6 - Toxic* substances and Infectious substances
Division 6.1 Toxic*substances
Division 6.2 Infectious substances
Class 7 - Radioactive materials
Class 8 - Corrosive substances
Class 9 - Miscellaneous hazardous materials/Products, Substances or Organisms
* The words “poison” or “poisonous” are synonymous with the word “toxic”.

Ship form

There are three ( 3 ) categories in ship form from the “ IMO A212 ( VII )CODE for the construction and Equipment of Ship Carrying Dangerous Chemicals in Bulk “.

Type 1
This is the most severe type for protecting hazard and is applied to the ship which is considered to spread the hazard chemicals in the wider area outside the ship. This is a type which is possible to prevent the hazard chemicals from spreading even though the ship is stranded or collides.

Type 2
This is not so severe as the type 1 and allowed to spread certain amount of the chemicals to some extent. This is also a type which requires sufficient construction to prevent the chemicals from spreading.

Type 3
This is not severe as the type 2 and is a type to increase floatability when the ship is damaged comparing with ordinary oil tankers. This type applies to the cargo which requires adequate storage.