WHAT IS SUBSIDIARY RISK?

Image showing a bottle of Benzene (Photo credit: Wikipedia)

Class or division represents the main risk posed by the dangerous goods. There are total 15 predominant classes and divisions which are listed below

1. Class 1          Explosives
2. Class 2.1       Flammable Gases
3. Class 2.2       non-flammable, non-toxic gases
4. Class 2.3       toxic gases
5. Class 3          Flammable liquids
6. Class 4.1       flammable solids, self-reactive    substances    and solid desensitized Explosives
7. Class 4.2       substances liable to spontaneous    combustion
8. Class 4.3       substances which, in contact with water, emit flammable gases
9. Class 5.1       oxidizing substances
10. Class 5.2       organic peroxides
11. Class 6.1       toxic substances
12. Class 6.2       infectious substances
13. Class 7          Radioactive material
14. Class 8          Corrosive substances

15. Class 9        Miscellaneous dangerous substances and articles

Some of the substances have multiple hazards.

Ethanol is a flammable liquid listed under UN 1170, ETHANOL, and Class 3

Methanol is a flammable liquid which is also toxic listed under UN 1230, METHANOL, Class 3, and Subsidiary Risk 6.1

Ethanol has only one risk, flammability

Methanol has two risks, Main risk = Flammability & Subsidiary risk = toxicity

Deutsch: Ethanol, Spiritus, vergällter Alkohol English: ethanol (Photo credit: Wikipedia)

To know more about classification procedures and risks refer chapter 2.0 & 2.x of IMDG Code for respective classes.

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