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  5. Hazard Identification Numbers Displayed on Some Intermodal Containers

Hazard Identification Numbers Displayed on Some Intermodal Containers

Hazard identification numbers, utilized under European and some South American regulations, may be found in the top half of an orange panel on some intermodal bulk containers. The United Nations 4-digit identification number is in the bottom half of the orange panel.

Hazard identification code image

The hazard identification number in the top half of the orange panel consists of two or three digits. In general, the digits indicate the following hazards:

2 - Emission of gas due to pressure or chemical reaction
3 - Flammability of liquids (vapors) and gases or self-heating liquid
4 - Flammability of solids or self-heating solid
5 - Oxidizing (fire-intensifying) effect
6 - Toxicity or risk of infection
7 - Radioactivity
8 - Corrosivity
9 - Risk of spontaneous violent reaction

Note: The risk of spontaneous violent reaction within the meaning of digit 9 includes the possibility, due to the nature of a substance, of a risk of explosion, disintegration and polymerization reaction followed by the release of considerable heat or flammable and/or toxic gases.

  • Doubling of a digit indicates an intensification of that particular hazard (i.e., 33, 66, 88).
  • Where the hazard associated with a substance can be adequately indicated by a single digit, the digit is followed by a zero (i.e., 30, 40, 50).
  • A hazard identification number prefixed by the letter "X" indicates that the substance will react dangerously with water (i.e. X88).

The hazard identification numbers listed below have the following meanings:

20
Asphyxiant gas or gas with no subsidiary risk
22
Refrigerated liquefied gas, asphyxiant
223
Refrigerated liquefied gas, flammable
225
Refrigerated liquefied gas, oxidizing (fire-intensifying)
23
Flammable gas
238
Gas, flammable corrosive
239
Flammable gas which can spontaneously lead to violent reaction
25
Oxidizing (fire-intensifying) gas
26
Toxic gas
263
Toxic gas, flammable
265
Toxic gas, oxidizing (fire-intensifying)
268
Toxic gas, corrosive
28
Gas, corrosive
30
Flammable liquid (flash-point between 23°C and 60°C, inclusive), or flammable liquid or solid in the molten state with a flash point above 60°C, heated to a temperature equal to or above its flash point, or self-heating liquid
323
Flammable liquid which reacts with water, emitting flammable gases
X323
Flammable liquid which reacts dangerously with water, emitting flammable gases
33
Highly flammable liquid (flash-point below 23°C)
333
Pyrophoric liquid
X333
Pyrophoric liquid which reacts dangerously with water
336
Highly flammable liquid, toxic
338
Highly flammable liquid, corrosive
X338
Highly flammable liquid, corrosive, which reacts dangerously with water
339
Highly flammable liquid which can spontaneously lead to violent reaction
36
Flammable liquid (flash-point between 23°C and 60°C, inclusive), slightly toxic, or self-heating liquid, toxic
362
Flammable liquid, toxic, which reacts with water, emitting flammable gas
X362
Flammable liquid, toxic, which reacts dangerously with water, emitting flammable gases
368
Flammable liquid, toxic, corrosive
38
Flammable liquid (flash-point between 23°C and 60°C, inclusive), slightly corrosive or self-heating liquid, corrosive
382
Flammable liquid, corrosive, which reacts with water, emitting flammable gases
X382
Flammable liquid, corrosive, which reacts dangerously with water, emitting flammable gases
39
Flammable liquid, which can spontaneously lead to violent reaction
40
Flammable solid, or self-reactive substance, or self-heating substance
423
Solid which reacts with water, emitting flammable gases, or flammable solid which reacts with water, emitting flammable gases, or self-heating solid which reacts with water, emitting flammable gases
X423
Solid which reacts dangerously with water, emitting flammable gases, or flammable solid which reacts dangerously with water, emitting flammable gases, or self-heating solid which reacts dangerously with water, emitting flammable gases
43
Spontaneously flammable (pyrophoric) solid
X432
Spontaneously flammable (pyrophoric) solid which reacts dangerously with water, emitting flammable gases
44
Flammable solid, in the molten state at an elevated temperature
446
Flammable solid, toxic, in the molten state at an elevated temperature
46
Flammable or self-heating solid, toxic
462
Toxic solid which reacts with water, emitting flammable gases
X462
Solid which reacts dangerously with water, emitting toxic gases
48
Flammable or self-heating solid, corrosive
482
Corrosive solid which reacts with water, emitting flammable gases
X482
Solid which reacts dangerously with water, emitting corrosive gases
50
Oxidizing (fire-intensifying) substance
539
Flammable organic peroxide
55
Strongly oxidizing (fire-intensifying) substance
556
Strongly oxidizing (fire-intensifying) substance, toxic
558
Strongly oxidizing (fire-intensifying) substance, corrosive
559
Strongly oxidizing (fire-intensifying) substance which can spontaneously lead to violent reaction
56
Oxidizing substance (fire-intensifying), toxic
568
Oxidizing substance (fire-intensifying), toxic, corrosive
58
Oxidizing substance (fire-intensifying), corrosive
59
Oxidizing substance (fire intensifying), which can spontaneously lead to violent reaction
60
Toxic or slightly toxic substance
606
Infectious substance
623
Toxic liquid, which reacts with water, emitting flammable gases
63
Toxic substance, flammable (flash-point between 23°C and 60°C, inclusive)
638
Toxic substance, flammable, (flash-point between 23°C and 60°C, inclusive), corrosive
639
Toxic substance, flammable, (flash-point not above 60°C) which can spontaneously lead to violent reaction
64
Toxic solid, flammable or self-heating
642
Toxic solid which reacts with water, emitting flammable gases
65
Toxic substance, oxidizing (fire-intensifying)
66
Highly toxic substance
663
Highly toxic substance, flammable (flash-point not above 60°C)
664
Highly toxic solid, flammable or self-heating
665
Highly toxic substance, oxidizing (fire-intensifying)
668
Highly toxic substance, corrosive
X668
Highly toxic substance, corrosive, which reacts dangerously with water
669
Highly toxic substance which can spontaneously lead to violent reaction
68
Toxic substance, corrosive
69
Toxic or slightly toxic substance which can spontaneously lead to violent reaction
70
Radioactive material
78
Radioactive material, corrosive
80
Corrosive or slightly corrosive substance
X80
Corrosive or slightly corrosive substance which reacts dangerously with water
823
Corrosive liquid which reacts with water, emitting flammable gases
83
Corrosive or slightly corrosive substance, flammable (flash-point between 23°C and 60°C, inclusive)
X83
Corrosive or slightly corrosive substance, flammable (flash-point between 23°C and 60°C, inclusive), which reacts dangerously with water
839
Corrosive or slightly corrosive substance, flammable (flash-point between 23°C and 60°C, inclusive), which can spontaneously lead to violent reaction
X839
Corrosive or slightly corrosive substance, flammable (flash-point between 23°C and 60°C, inclusive), which can spontaneously lead to violent reaction and which reacts dangerously with water
84
Corrosive solid, flammable or self-heating
842
Corrosive solid which reacts with water, emitting flammable gases
85
Corrosive or slightly corrosive substance, oxidizing (fire-intensifying)
856
Corrosive or slightly corrosive substance, oxidizing (fire-intensifying) and toxic
86
Corrosive or slightly corrosive substance, toxic
88
Highly corrosive substance
X88
Highly corrosive substance which reacts dangerously with water
883
Highly corrosive substance, flammable (flash-point between 23°C and 60°C, inclusive)
884
Highly corrosive solid, flammable or self-heating
885
Highly corrosive substance, oxidizing (fire-intensifying)
886
Highly corrosive substance, toxic
X886
Highly corrosive substance, toxic, which reacts dangerously with water
89
Corrosive or slightly corrosive substance which can spontaneously lead to violent reaction
90
Environmentally hazardous substance; miscellaneous dangerous substances
99
Miscellaneous dangerous substance carried at an elevated temperature
Date Modified:
2016-08-25