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A Swiss Poison Class rating appears on some European Material Safety Data Sheets issued before August 1, 2005. The classes number from 1 to 5 with 1 being the most toxic.
The purposes of the law were to prevent the poisoning of humans and animals, better educate manufacturers and users about the dangers, and encourage the use of less dangerous substances.
The rating scale reflected acute oral lethal doses (usually in rats). The rating scale was:
Switzerland formerly maintained three separate poison lists which cover approximately 176,00 chemicals and products. Do not confuse the list number with the Class number!
List 1 contained approximately 10,000 poisonous chemical materials
List 2 contained poisonous public products.
List 3 contained poisonous commercial products.
Special remarks could be included for each list item, providing information about labeling and marking, precautionary measures, transportation, prohibited usage, and physical warning signals (odor, color etc.).
Items in classes 1 and 2 had to be labeled with a skull and crossbones symbol and the word Poison ("Gifte" in German). The labels had to have a black "poison volume" (?). Class 3 had to be be yellow; classes 4 and 5 had to be red.
This number appears on outdated Material Safety Data Sheets meant for the European market and is obsolete. If your current MSDS references a Swiss Poison Class, it is likely out of date and you should obtain a new SDS from the manufacturer. If you can not find a new sheet, then keep in mind that the lower the number (1-5), the more dangerous the material. One can search the Information System for Dangerous and Ecologically Relevant Substances (IGS) to determine the poison class. See the last link below under Further Reading.
Additional definitions for metric system from Google and OneLook.
Disclaimer: The information contained herein is believed to be true and accurate, however ILPI makes no guarantees concerning the veracity of any statement. Use of any information on this page is at the reader's own risk. ILPI strongly encourages the reader to consult the appropriate local, state and federal agencies concerning the matters discussed herein.