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 Class 8: Corrosive Materials
A substance which by chemical action will cause severe damage when in contact with living tissue and cause damage to other freight or equipment on the vehicle if leakage occurs. Its packing groups are categorized by considering additional factors such as reaction to water or danger of inhalation.

The packing group can be categorized by the length of period it takes to destroy the whole thickness of human skin. Materials that have potential to corrode part of surface of metal can be classified as corrosive materials, although they do not destroy whole thickness of human skin.

Packing groups of corrosive materials are categorized as below.

* Packing Group I - If the skin tissue used in the test begin to destroy within 3 minutes, and it is destroyed within 60 minutes.
* Packing Group II - If the skin tissue used in the test begin to destroy after 3 minutes and before 60 minutes, and it is fully necrotized before 14 days.
* Packing Group III - If the skin tissue used in the test begin to destroy after 60 minutes and before 4 hours, and it is fully necrotized before 14 days. Or materials that shows corrosive rate 6.25mm per year to surface of steel or aluminium at 55 ¡ÆC although it does not fully nectrotize skin tissue.