IMDG Contents
• The Code comprises 7 parts.
• It is presented in two books; Volume 1 and Volume 2.
• It is necessary to use both books to obtain the required information when shipping dangerous goods by sea.The Code also contains a Supplement.

Volume 1 (Parts 1-2 & 4-7 of the Code) comprises:
Part 1 General provisions, definitions and training
Part 2 Classifications
Part 4 Packing and tank provisions
Part 5 Consignment procedures
Part 6 Construction and Testing of Packagings, Intermediate Bulk Containers (IBCs), Large Packagings, Portable Tanks, Multi-Element Gas Containers (MEGCs) and Road Tank  Vehicles
Part 7 Requirements concerning transport operations

Volume 2 (Part 3 and the Appendices of the Code) comprises:
Part 3 Dangerous Goods List (DGL) and Limited Quantities Exceptions
The DGL is the central core of the IMDG Code and presents information on transport requirements in a coded form
Appendix A List of Generic and N.O.S. (Not Otherwise Specified) Proper Shipping Names
Appendix B Glossary of terms
Alphabetical Index

The supplement contains the following texts related to the Code:
•   Emergency Response Procedures for Ships Carrying Dangerous Goods
•   Medical First Aid Guide
•   Reporting Procedures
•   IMO/ILO/ECE Guidelines for Packing Cargo Transport Units
•   Safe Use of Pesticides in Ships
•   International Code for the Carriage of Packaged
    Irradiated Nuclear Fuel, Plutonium and High-Level Radioactive Wastes on Board Ships

Table information in IMDG
Column 1 – UN Number
Contains the United Nations Number assigned by the United Nations Committee of Experts on the Transport of Dangerous Goods (UN List).
Column 2 – Proper Shipping Name (PSN)
Contains the Proper Shipping Names in upper case characters which may have to be followed by additional descriptive text in lower-case characters.
Column 3 – Class or Division
Contains the class and, in the case of class 1, the division and compatibility group.
Column 4 – Subsidiary Risk(s)
Contains the class number(s) of any subsidiary risk(s).  This column also identifies dangerous goods as a marine pollutant or a severe marine pollutant as follows:
P Marine pollutant
PP Severe marine pollutant
● Marine pollutant only when containing 10% or more substance(s) identified with ‘P’ or 1% or more substance(s) identified with ‘PP’ in this column or in the Index.
Column 5 – Packing Group
Contains the packing group number (i.e. I, II or III) where assigned to the substance or article.
Column 6 – Special Provisions
Contains a number referring to any special provision(s) indicated in chapter 3.3.
Column 7 – Limited Quantities
Provides the maximum quantity per inner packaging.
Column 8 – Packing Instructions
Contains packing instructions for the transport of substances and articles.
Column 9 – Special Packing Provisions
Contains special packing provisions.
Column 10 – IBC Packing Instructions
Contains IBC instructions which indicate the type of IBC that can be used for the transport.  A code including the letters ‘IBC’ refers to packing instructions for the use of IBCs described in chapter 6.5.
Column 11 – IBC Special Provisions
Refers to special packing provisions applicable to the use of packing instructions bearing the code ‘IBC’ in 4.1.4.2.
Column 12 – IMO Tank Instructions
This column only applies to IMO portable tanks and road tank vehicles.
Column 13 – UN Tank and Bulk Container Instructions
Contains T codes (see 4.2.5.2.6) applicable to the transport of dangerous goods in portable tanks and road tank vehicles.
Column 14 – Tank Special Provisions
Contains TP notes (see 4.2.5.3) applicable to the transport of dangerous goods in portable tanks and road road tank vehicles.  The TP notes specified in this column apply to the portable tanks specified in both columns 12 and 13.
Column 15 – EmS
Refers to the relevant emergency schedules for FIRE and SPILLAGE in ‘The EmS Guide – Emergency Response Procedures for Ships Carrying Dangerous Goods’.
Column 16 – Stowage and Segregation
Contains the stowage and segregation provisions as prescribed in part 7.
Column 17 – Properties and Observations
Contains properties and observations on the dangerous goods listed.
Column 18 – UN Number
Contains the United Nations Number assigned to a dangerous good by the United Nations Committee of Experts on the Transport of Dangerous Goods (UN List).