Number to identify the hazard
The number for identifying the hazard ( danger number , formerly Kemler number , originally officially French numéro d'identification du danger , English hazard identification number ) is an identification number that is uniformly defined for all dangerous substances . It is the upper number on the orange-colored warning signs ( danger signs ) affixed to all dangerous goods transports and describes the danger posed by the transported goods.
The lower number is called the UN number (substance number) - see: List of UN numbers
Function of the hazard number
The danger number is defined in the European Agreement on the International Carriage of Dangerous Goods by Road (ADR) or in the Règlement concernant le transport international ferroviaire de marchandises Dangereuses (RID).
The UN number and the danger number should always be communicated to the police / fire brigade control center in the event of an accident, as this enables them to better coordinate the help. The numbers (together with the ERI cards ) provide fire brigades and other authorities and organizations with security tasks with important information for the rapid recording of the hazard potential of substances and the initiation of correct measures.
Code number
Meaning of the digits:
- 2 - Risk of gas leakage due to pressure or chemical reaction
- 3 - Flammability of liquids (gases / vapors ) or self-heating liquid substance
- 4 - Flammability of solid or self-heating solid
- 5 - Oxidizing ( fire-promoting ) effect
- 6 - Danger from toxicity or contamination
- 7 - Radioactivity hazard
- 8 - Risk of corrosion
- 9 - in 1st position: Environmentally hazardous substance; Various dangerous substances
- 9 - in the 2nd or 3rd position: danger of a spontaneous violent reaction
- 0 - Without particular danger (only as a placeholder for the second digit)
- X - Reacts dangerously with water ( preceded by the number )
The digits of the hazard number generally correspond to the dangerous goods class, with the exception of class 1 explosives , which - due to the risk of confusion - are marked with numbers for flammability (3, 4). The marking with 1 occurs only on the package itself, not on the transport vehicle.
Structure of the hazard number
The number consists of at least two to a maximum of three digits , which list the most important hazards emanating from the substance, possibly with an X in front for additional risk in connection with water (important for extinguishing operations). Combinations of different digits are possible. The repetition of a digit means an increase in the risk of this type.
The combination of the numbers indicate the specific dangers of the dangerous goods and are named according to their value from left to right. The first digit thus represents the main danger, the other digits are regarded as additional dangers.
If there is only one danger, the 2nd digit is replaced by a zero:
- Example: Diesel fuel / heating oil (UN 1202): Hazard number 30, flammable, but flash point > 55 ° C, labeled 3
A doubled number indicates a particularly high risk:
- Example: Petrol (UN 1203): Hazard number 33, highly flammable liquid ( flash point below 20 ° C)
- Example: Arsenic (UN 1558): Hazard number 60 , toxic; Arsenic acid (UN 1553/1554): Hazard number 66 very toxic , both labeled 6.1
List of dangerous goods numbers
Gaseous substances
| 20th | inert gas |
| 22nd | frozen gas |
| 223 | frozen flammable gas |
| 225 | frozen oxidizing gas |
| 23 | flammable gas |
| 236 | flammable gas, toxic |
| 239 | flammable gas which can spontaneously lead to violent reactions |
| 25th | oxidizing gas |
| 26th | toxic gas |
| 265 | toxic gas, oxidizing |
| 266 | very toxic gas |
| 268 | toxic gas, corrosive |
| 286 | corrosive gas, toxic |
Liquid substances
| 30th | Flammable liquid (flash point from 23 ° C up to and including 61 ° C) or flammable liquid or solid in a molten state with a flash point above 61 ° C, heated to or above its flash point or self-heating liquid |
| 323 | flammable liquid which reacts with water to form flammable gases |
| X323 | Flammable liquid that reacts dangerously with water and forms flammable gases (water may only be used with the consent of an expert) |
| 33 | highly flammable liquid (flash point below 23 ° C) |
| X33 | highly flammable liquid substance (flash point below 23 ° C) (water may only be used with the consent of an expert) |
| 333 | Self-igniting (pyrophoric) liquid |
| X333 | Self-igniting (pyrophoric) liquid that reacts dangerously with water (water may only be used with the consent of an expert) |
| 336 | highly flammable liquid, toxic |
| 338 | highly flammable liquid, corrosive |
| X338 | highly flammable liquid, corrosive, which reacts dangerously with water (water may only be used with the consent of an expert) |
| 339 | highly flammable liquid which can spontaneously lead to violent reactions |
| 36 | Flammable liquid (flash point from 23 ° C up to and including 61 ° C), slightly toxic, or self-heating liquid, toxic |
| 362 | Flammable liquid, toxic, which reacts with water and forms flammable gases (water may only be used with the consent of an expert) |
| X362 | Flammable liquid, toxic, which reacts dangerously with water and forms flammable gases (water may only be used with the consent of an expert) |
| 38 | Flammable liquid (flash point from 23 ° C up to and including 61 ° C), slightly corrosive, or self-heating liquid, corrosive |
| 382 | Flammable liquid, corrosive, which reacts with water and forms flammable gases (water may only be used with the consent of an expert) |
| X382 | Flammable liquid, corrosive, which reacts dangerously with water and forms flammable gases (water may only be used with the consent of an expert) |
| 39 | Flammable liquid which can spontaneously lead to violent reactions |
Solid fabrics
| 40 | flammable or self-heating solid |
| 423 | solid substance that reacts with water and emits flammable gases |
| X423 | flammable solid which reacts dangerously with water and forms flammable gases (water may only be used with the consent of an expert) |
| 44 | flammable solid which is in a molten state at an elevated temperature |
| 446 | flammable solid, toxic, which is in a molten state at elevated temperature |
| 46 | flammable or self-heating solid, toxic |
| 462 | solid, toxic, which reacts with water and emits flammable gases |
| 48 | flammable or self-heating solid, corrosive |
| 482 | solid, corrosive, which reacts with water and emits flammable gases |
Oxidizing substances
| 50 | oxidizing substance |
| 539 | flammable organic peroxide |
| 55 | strongly oxidizing substance |
| 556 | strongly oxidizing substance, toxic |
| 558 | strongly oxidizing substance, corrosive |
| 559 | Strongly oxidizing substance that can spontaneously lead to violent reactions |
| 56 | oxidizing substance, toxic |
| 568 | oxidizing substance, toxic, corrosive |
| 58 | oxidizing substance, corrosive |
| 59 | Oxidising substance which can spontaneously lead to violent reactions |
Toxic substances
| 60 | toxic or slightly toxic substance |
| 606 | infectious substance |
| 623 | toxic liquid which reacts with water and emits flammable gases |
| 63 | toxic substance, flammable (flash point from 23 ° C to 61 ° C) |
| 638 | toxic substance, flammable (flash point from 23 ° C to 61 ° C), corrosive |
| 639 | Toxic substance, flammable (flash point from 23 ° C to 61 ° C), which can spontaneously lead to violent reactions |
| 64 | toxic solid, flammable or self-heating |
| 642 | toxic solid which reacts with water and emits flammable gases |
| 65 | toxic substance, oxidizing |
| 66 | very toxic substance |
| 663 | very toxic substance, flammable (flash point not above 61 ° C) |
| 664 | very toxic solid, flammable or self-heating |
| 665 | very toxic substance, oxidizing |
| 668 | very toxic substance, corrosive |
| 669 | very toxic substance which can spontaneously lead to violent reactions |
| 68 | toxic substance, corrosive |
| 69 | toxic or slightly toxic substance that can spontaneously lead to violent reactions |
Radioactive substances
| 70 | radioactive material |
| 72 | radioactive gas |
| 723 | radioactive gas, flammable |
| 73 | radioactive material, flammable (flash point not above 61 ° C) |
| 74 | radioactive solid, flammable |
| 75 | radioactive substance, oxidizing |
| 76 | radioactive substance, toxic |
| 78 | radioactive substance, corrosive |
Corrosive substances
| 80 | corrosive or slightly corrosive substance |
| X80 | corrosive or slightly corrosive substance that reacts dangerously with water (water may only be used in agreement with experts) |
| 823 | corrosive liquid which reacts with water and emits flammable gases |
| 83 | corrosive or slightly corrosive substance, flammable (flash point from 23 ° C to 61 ° C) |
| X83 | Corrosive or slightly corrosive substance, flammable (flash point from 23 ° C to 61 ° C), which reacts dangerously with water (water may only be used with the consent of an expert) |
| 836 | Corrosive or slightly corrosive substance, flammable (flash point from 23 ° C to 61 ° C), toxic |
| 839 | Corrosive or slightly corrosive substance, flammable (flash point from 23 ° C to 61 ° C), which can spontaneously lead to violent reactions |
| X839 | Corrosive or slightly corrosive substance, flammable (flash point from 23 ° C to 61 ° C), which can spontaneously lead to violent reactions and reacts dangerously with water (water may only be used with the consent of an expert) |
| 84 | corrosive solid, flammable or self-heating |
| 842 | corrosive solid which reacts with water and emits flammable gases |
| 85 | corrosive or slightly corrosive substance, oxidizing |
| 856 | corrosive or slightly corrosive substance, oxidizing and toxic |
| 86 | corrosive or slightly corrosive substance, toxic |
| 88 | highly corrosive substance |
| X88 | highly corrosive substance that reacts dangerously with water (water may only be used with the consent of experts) |
| 883 | highly corrosive substance, flammable (flash point from 23 ° C to 61 ° C) |
| 884 | highly corrosive solid, flammable or self-heating |
| 885 | highly corrosive substance, oxidizing |
| 886 | highly corrosive substance, toxic |
| X886 | highly corrosive substance, poisonous, which reacts dangerously with water (water may only be used in agreement with experts) |
| 89 | corrosive or slightly corrosive substance which can spontaneously lead to violent reactions |
Other dangerous substances
| 90 | environmentally hazardous substance or various dangerous substances |
| 99 | various dangerous substances in a heated state |
Regulations outside of ADR / RID
Different markings are also used in different countries:
- The HAZCHEM Emergency Action Code ( UK )
- The NFPA Hazard Diamond ( USA )
See also
- H and P phrases - hazard and safety information for hazardous substances
- dangerous goods
- Class of dangerous goods
literature
- European Agreement concerning the International Carriage of Dangerous Goods by Road (ADR) . 2007, 5.3.2.3 Meaning of the numbers to identify the hazard , p. 5.3-5 f . ( P. 23f [PDF]).
- see also literature on dangerous goods and ADR
Web links
- Chemie.de - labeling of dangerous substances