Chemicals, especially hazardous chemicals, must be stored in such a way that they endanger neither health nor the environment. Knowledge of the potential danger involved is the best basis for initiating appropriate safety measures. Such measures are reflected in the Technical Regulations as Applied to Hazardous Materials (Technischen Regeln für Gefahrstoffe, TRGS) and in special laws, particularly those applying to accident prevention (Unfallverhütungsvorschriften, UVV).
Storage is the keeping of materials for later use, disposal or onward transport to third parties. Transferring to third parties includes preparation for transport.
The potential for danger generated by the storage of chemicals depends not only on the quantities but also from the degree of hazard involved. If chemicals are simply stored without taking into account their specific degree of hazard, the potential danger is increased proportionately. In order to avoid the necessity for evaluating each and every chemical prior to storage, the Association of the Chemical Industry (Verband der Chemischen Industrie, VCI) has developed a "Concept for storing chemicals together" whereby each product is allocated a particular "storage class". This concept takes into account the laws and regulations applicable in Germany to the storage of chemicals. For those areas not subject to regulation, recommendations are given.
Each chemical is allocated one storage class only; those with more than one hazard characteristic are allocated according to the ranking of their hazard characteristics. This ensures that in the case of chemicals with similar or identical hazard characteristics, the same safety measures can be taken, especially against fire and explosion. Liquid or solid substances as well as preparations and products that do not fulfil the criteria of classes 1-8 are characterized as being of classes 10-13. No further differentiation in class is made between classes 10, 11, 12 and 13 as these are all substance-orientated; the flammability of the substance/package unit cannot be assessed in these cases.
There are no legal restrictions pertaining to the storage together of substances within classes 10-13. If articles belonging to class 10-13 are to be stored together with substances of other classes, the table should be used and the flammability of substance and packaging taken into account.
LGK Designation
1 Explosive material (2nd German Explosives Act: Storage groups 1.1 - 1.4)
2 A Compressed, liquified, or pressure-dissolved gases
2 B Pressurized gas packages (aerosol containers)
3 A Flammable liquid materials (Flp below 55 °C)
3 B Flammable liquids (VbF Hazard class: A III)
4.1 A Flammable solid materials (2nd German Explosives Act: Storage groups I-III)
4.1 B Flammable solid materials (EC Method A 10)
4.2 Spontaneously combustible materials
4.3 Materials that form flammable gases in contact with water
5.1 A Oxidizing agents (TRGS 515 Group 1)
5.1 B Oxidizing agents (TRGS 515 Groups 2+3)
5.1 C Oxidizing agents (TRGS 511 Groups A-C)
5.2 Organic peroxides
6.1 A Flammable toxic materials
6.1 B Non-flammable toxic materials
6.2 Infectious materials
7 Radioactive materials
8 A Flammable corrosive materials
8 B Non-flammable corrosive materials
10 Flammable liquids if not LGK 3A or 3B
11 Flammable solids
12 Non-flammable liquids in non-flammable packages
13 Non-flammable solids in non-flammable packages
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