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Basel Convention on the Control of Transboundary Movements

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UN Class 5 Code Characteristics<br />

4.1 H4.1 Flammable solids<br />

Solids, or waste solids, o<strong>the</strong>r than those<br />

classed as explosives, which under c<strong>on</strong>diti<strong>on</strong>s<br />

encountered in transport are readily<br />

combustible, or may cause or c<strong>on</strong>tribute to fire<br />

through fricti<strong>on</strong>.<br />

4.2 H4.2<br />

4.3 H4.3<br />

Substances or wastes liable to sp<strong>on</strong>taneous<br />

combusti<strong>on</strong><br />

Substances or wastes which are liable to<br />

sp<strong>on</strong>taneous heating under normal c<strong>on</strong>diti<strong>on</strong>s<br />

encountered in transport, or to heating up <strong>on</strong><br />

c<strong>on</strong>tact with air, and being <strong>the</strong>n liable to catch<br />

fire.<br />

Substances or wastes which, in c<strong>on</strong>tact with<br />

water emit flammable gases<br />

Substances or wastes which, by interacti<strong>on</strong><br />

with water, are liable to become sp<strong>on</strong>taneously<br />

flammable or to give <strong>of</strong>f flammable gases in<br />

dangerous quantities.<br />

5.1 H5.1 Oxidizing<br />

Substances or wastes which, while in<br />

<strong>the</strong>mselves not necessarily combustible,<br />

may, generally by yielding oxygen cause,<br />

or c<strong>on</strong>tribute to, <strong>the</strong> combusti<strong>on</strong> <strong>of</strong> o<strong>the</strong>r<br />

materials.<br />

5.2 H5.2 Organic Peroxides<br />

Organic substances or wastes which c<strong>on</strong>tain<br />

<strong>the</strong> bivalent-o-o-structure are <strong>the</strong>rmally<br />

unstable substances which may undergo<br />

exo<strong>the</strong>rmic self-accelerating decompositi<strong>on</strong>.<br />

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