The heading of Class 4.1 covers flammable substances and articles, desensitized explosives which are solids, self-reactive liquids or solids and polymerizing substances.
The following are assigned to Class 4.1:
| F |
Flammable solids, without subsidiary risk:
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| FO | Flammable solids, oxidising | ||||||||
| FT |
Flammable solids, toxic
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| FC |
Flammable solids, corrosive
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| D | Solid desensitized explosives without subsidiary risk | ||||||||
| DT | Solid desensitized explosives, toxic | ||||||||
| SR |
Self-reactive substances
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| PM |
Polymerizing substances
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