Physical hazard codes

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Last updated 11:40 AM on 6/9/26
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32 Terms

1
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H200

Unstable explosive

2
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H201

Explosive; mass explosion hazard

3
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H202

Explosive; severe projection hazard

4
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H203

Explosive; fire, blast or projection hazard

5
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H204

Fire or projection hazard

6
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H205

May mass explode in fire

7
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H220

Extremely flammable gas

8
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H221

Flammable gas

9
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H222

Extremely flammable aerosol

10
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H223

Flammable aerosol

11
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H224

Extremely flammable liquid and vapour

12
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H225

Highly flammable liquid and vapour

13
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H226

Flammable liquid and vapour

14
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H227

Combustible liquid

15
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H228

Flammable solid

16
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H229

Pressurized container

17
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H230

May react explosively even in the absence of air

18
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H231

May react explosively even in the absence of air at elevated pressure and/or temperature

19
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H240

Heating may cause an explosion

20
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H241

Heating may cause a fire or explosion

21
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H242

Heating may cause a fire

22
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H250

Catches fire spontaneously if exposed to air

23
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H251

Self-heating; may catch fire

24
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H252

Self-heating in large quantities; may catch fire

25
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H260

In contact with water releases flammable gases which may ignite spontaneously

26
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H261

In contact with water releases flammable gas

27
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H270

May cause or intensify fire; oxidizer

28
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H271

May cause fire or explosion; strong oxidizer

29
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H272

May intensify fire; oxidizer

30
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H280

Contains gas under pressure; may explode if heated

31
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H281

Contains refrigerated gas; may cause cryogenic burns or injury

32
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H290

May be corrosive to metals