Hazard Identification Number (HIN)

Elements of the HIN

Meaning

2

emission of gas

3

liquid, flammable or self-heating

4

solid, flammable or self-heating

5

oxidizing

6

toxicity or risk of infection

7

radioactivity

8

corrosive

9

spontaneously violent reaction

duplicate use of number

greater hazard

0

added if single digit adequate

X

reacts dangerously with water

Number

Hazard

20

asphyxiant gas or gas with no subsidiary risk

22

refrigerated liquid gas, asphyxiant

223

refrigerated liquid gas, flammable

225

refrigerated liquid gas, oxidizing

23

flammable gas

238

flammable gas, corrosive

239

flammable gas, spontaneous violent reaction

25

oxidizing

26

toxic gas

263

toxic gas, flammable

265

toxic gas, oxidizing

268

toxic gas, corrosive

28

gas, corrosive

30

flammable gas; self-heating liquid; flammable liquid or solid in the molten state with flash point above 60°C, heated to a temperature at or above flashpoint

323

flammable liquid, reacts with water, emitting flammable gases

X323

flammable liquid, reacts dangerously with water, emitting flammable gases

33

highly flammable liquid

333

pyrophoric liquid

X333

pyrophoric liquid, reacts dangerously with water

336

highly flammable liquid, toxic

338

highly flammable liquid, corrosive

X338

highly flammable liquid, corrosive, reacts dangerously with water

339

highly flammable liquid, spontaneous violent reaction

36

flammable liquid, slightly toxic, self-heating liquid, toxic

362

flammable liquid, toxic, reacts with water emitting flammable gas

X362

flammable liquid, toxic, reacts dangerously with water, emitting flammable gases

368

flammable liquid, toxic, corrosive

38

flammable liquid or self-hearting liquid,  slightly corrosive

382

flammable liquid, corrosive, reacts with water emitting flammable gas

X382

flammable liquid, corrosive, reacts dangerously with water, emitting flammable gases

39

flammable liquid, spontaneous violent reaction

40

flammable solid, or self-reactive substance, or self-heating substance

423

solid reacts with water emitting flammable gases, or flammable solid emitting reactive flammable gases or self-heating solid reacts with water emitting flammable gases

X423

solid reacts dangerously with water emitting flammable gases, or flammable solid reacts dangerously with water emitting reactive flammable gases

43

pyrophoric solid

X432

pyrophoric solid, reacts dangerously with water emitting flammable gases

44

flammable solid, in molten state at an elevated temperature

446

flammable solid, toxic, in molten state at an elevated temperature

46

flammable or self-heating solid, toxic

462

toxic solid, reacts with water emitting flammable gases

X462

solid, reacts dangerously with water emitting toxic gases

48

flammable or self-heating solid, corrosive

482

corrosive solid, reacts with water emitting flammable gases

X482

solid, reacts dangerously with water emitting corrosive gas

50

oxidizing substance

539

flammable organic peroxide

55

strongely oxidizing substance

556

strongly oxidizing substance, toxic

558

strongly oxidizing substance. corrosive

559

strongly oxidizing substance, spontaneous violent reaction

56

oxidizing substance, toxic

568

oxidizing substance, toxic, corrosive

58

oxidizing substance, corrosive

59

oxidizing substance, spontaneous violent reaction

60

toxic or slightly toxic substance

606

infectious substance

623

toxic liquid, reacts with water emitting flammable gas

63

toxic substance, flammable

638

toxic substance, flammable, corrosive

639

toxic substance, flammable, spontaneous violent reaction

64

toxic solid, flammable or self-heating

642

toxic solid, reacts with water emitting flammable gas

65

toxic substance, oxidizing

66

highly toxic substance

663

highly toxic substance. flammable or highly flammable

664

highly toxic solid, flammable or self-heating

665

highly toxic substance, oxidizing

668

highly toxic substance, corrosive

X668

highly toxic substance, corrosive, reacts dangerously with water

669

highly toxic substance, spontaneously lead to violent reaction

68

toxic substance, corrosive

69

toxic or slightly toxic substance, spontaneously lead to violent reaction

70

radioactive material

78

radioactive material, corrosive

80

corrosive or slightly corrosive substance

X80

corrosive or slightly corrosive substance, reacts dangerously with water

823

corrosive liquid, reacts with water emitting flammable gases

83

corrosive or slightly corrosive substance, flammable

X83

corrosive or slightly corrosive, flammable, reacts dangerously with water

839

corrosive or slightly corrosive, flammable, spontaneous violent reactions

X839

corrosive or slightly corrosive, flammable, spontaneous violent reactions, reacts dangerously with water

84

corrosive solid, flammable or self-hearting

842

corrosive solid that reacts with water, emitting flammable gases

85

corrosive or slightly corrosive, oxidizing

856

corrosive or slightly corrosive, oxidizing and toxic

86

corrosive or slightly corrosive, toxic

88

highly corrosive substance

X88

highly corrosive substance, reacts dangerously with water

883

highly corrosive substance, flammable

884

highly corrosive substance, flammable or self-heating

885

highly corrosive substance, oxidizing

886

highly corrosive substance, toxic

X886

highly corrosive substance, toxic, reacts dangerously with water

89

corrosive or slightly corrosive substance, spontaneous violent reactions

90

environmentally hazardous substance, miscellaneous

99

miscellaneous dangerous substance carriet at an elevated temperature