In GHS hazard categorization, which category number indicates an extremely flammable chemical?

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Multiple Choice

In GHS hazard categorization, which category number indicates an extremely flammable chemical?

Explanation:
GHS hazard categorization uses a tiered scale for flammable substances, where the most severe level is labeled as extremely flammable. That designation means the substance has the highest risk of ignition and rapid combustion, so it sits at the top of the flammability categories. The correct choice is the one that represents this strongest, most dangerous flammability label. The other levels describe progressively less severe conditions (highly flammable, flammable, etc.), which do not match the extremely flammable designation.

GHS hazard categorization uses a tiered scale for flammable substances, where the most severe level is labeled as extremely flammable. That designation means the substance has the highest risk of ignition and rapid combustion, so it sits at the top of the flammability categories. The correct choice is the one that represents this strongest, most dangerous flammability label. The other levels describe progressively less severe conditions (highly flammable, flammable, etc.), which do not match the extremely flammable designation.

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