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There is no such thing as a Class 3.1, or a Division 3.1 in the DOT scheme of classifying hazardous materials. The International Maritime Dangerous Goods Code used to use a Division 3.1 for the most flammable of flammable liquids, but that was removed from the code more than 10 years ago.

At present, hazardous materials may be described simply as "Class 3" if they meet the definition of flammable liquids.

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15y ago

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