Toxicity and Hazards of Chemicals Reagents

The hazardous characteristic properties and their consequent effects on the human body of certain commonly used chemicals are summarized in the following table  

Name TLV (ppm) Physical Characteristics Harmful Effect(s) Precautions 

Acetaldehyde 200 Gas at RT, bp 21°C Flammable Inhalation of its vapours causes irritation to eyes, skin and lungs. To be stored in a cool place. 

Acetic Anhydride 5 Liquid, bp 139.9°C pungent odour Irritates eyes, skin, mucous membrane and causes nausea, vomitting. To be used in a Fume-Cupboard. 

Acetonitrile 40 Colourless liquid bp 81.6°C Flammable produces acute headache, nausea and dizziness when inhaled. To be handled in a Fume-Cupboard. 

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