HAZARDOUS SUBSTANCES AND DANGEROUS GOODS Hazardous substances Hazardous
HAZARDOUS SUBSTANCES AND DANGEROUS GOODS
Hazardous substances Hazardous Substances are classified on the basis of health effects. They must be listed in the list of Designated Hazardous Substances or meet the criteria for a hazardous substance set out in the 'Approved Criteria for Classifying Hazardous Substances'. Hazardous substances may enter the body by inhalation, absorption, or ingestion, and may result in poisoning, irritation, burns, cancer or other health effects. Also hazardous substances contain a label indicating POISON, DANGEROUS POISON, CAUTION.
Dangerous goods Dangerous Goods are classified on the basis of immediate physical or chemical effects, such as fire, explosion, corrosion and poisoning, affecting property, the environment or people. They are used for storage and transport. Many hazardous substances are also classified as dangerous goods. Dangerous Goods may be classed as dangerous because during storage or transport they may explode. However the substance they contain may not be at all toxic.
Sources of Information Hazchem Codes Hazchem emergency action codes are designed to provide information of the firefighting medium, clothing, PPE, risk of explosion, spillage action, and whether evacuation is necessary for emergency services. They consist of a number followed by one or two letters. The numbers give the type of firefighting medium to be used. � Water jets � Spray or water fog � Foam � Dry agents (for any substance that reacts with water). s
The first letter indicates whethere is danger of violent reaction or explosion, The PPE required, and whether the substance should be diluted or contained. If the letter is against a black background then no toxic hazard will arise if it is a non-fire incident. The second letter indicates whether evacuation is needed.
P danger of violent reaction PPE required dilute R no danger of violent reaction PPE required dilute S danger of violent reaction breathing apparatus dilute T no danger of violent reaction breathing apparatus dilute W danger of violent reaction PPE required contain X no danger of violent reaction PPE required contain Y danger of violent reaction breathing apparatus contain Z no danger of violent reaction breathing apparatus contain
The Hazchem Warning Panel
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