Substances and formulations marked with the danger notation “highly flammable” are subject for self-heating and ignition under usual atmospheric conditions, or they have low ignition points (below + 21 °C). Some highly flammable substances produce extremely flammable gases under the influence of humidity. Substances they may heat up in air at room temperature without additional energy supply and finally ignite are also labeled as “highly flammable”.

Vefsíða: http://www.ust.is/atvinnulif/efni/flokkun-og-merking/varnadarmerki/

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