English for Chemists

 
 
 
 
4. Do you think these principles should be observed and that it is possible to observe them? 
 
 
Hazard symbols 
1. Which products are hazardous? 
 
 
 
 
 
2. What is the meaning of the following symbols? Match the phrases with symbols: 
 
 
 
irritant harmful highly flammable dangerous for the environment explosive 
toxic corrosive oxidizing extremely flammable very toxic

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3. These symbols are combined with the so called ‘S statements’ and ‘R statements’. Do you 
know what they are? 
 
 
 
 
4. Now match the symbols with the phrases explaining their meaning. 

____________ Living tissues as well as equipment are destroyed on contact with these 

chemicals. 
____________ Substances that are very hazardous to health when breathed, swallowed or in 
contact with the skin and may even lead to death. 
____________ Substances which are harmful to the aquatic, as well as the non-aquatic 
environment or which have a detrimental effect at longer term. 
____________ Substances which may explode under certain conditions. 
____________ Substances that can ignite combustible material or worsen existing fires and 
thus make fire-fighting more difficult.
____________ Substances which may have an irritant effect on skin, eyes and respiratory 
organs. 

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____________ 1. Liquids with flash points below 0°C and a boiling point of max. 35°C. 
2.Gaseous substances which are flammable in contact with air at ambient
temperature and pressure. 
____________ 1. Spontaneously flammable substances 
2. Substances sensitive to moisture.
3. Liquids with flash point bellow 21°C.