The information you provided appears to be related to the classification and labeling of hazardous materials, particularly in the context of chemical safety. Here's a breakdown of the key components:
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Type A and B: This typically refers to the classifications or categories of particular hazardous substances. In the context of self-reactive substances and organic peroxides, Type A and B distinguish between different levels of reactivity or hazard associated with these chemicals. Specific definitions of Type A and B may be outlined in the regulatory framework (like the Globally Harmonized System of Classification and Labeling of Chemicals - GHS).
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Exploding Bomb Symbol: The symbol represents hazards related to explosives or reactive substances. It indicates that the material could potentially cause an explosion or react violently under certain conditions.
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Hazards: Fire and explosion hazards specify the dangers associated with the substances, emphasizing that they may lead to fires or explosions if not handled properly.
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Self-Reactive Substances and Mixtures: These are substances that can undergo self-accelerating reactions, leading to thermal decomposition. Type A and B classifications indicate variations in stability and the potential for non-exothermic (relatively stable) or exothermic (more reactive) behaviors.
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Organic Peroxides: Organic peroxides are a specific class of compounds that can be extremely reactive and may pose explosion hazards. Again, Type A and B classifications would indicate their relative stability or danger.
In summary, the text indicates that both self-reactive substances and organic peroxides have associated risks of fire and explosion, and that Type A and B classifications help categorize these risks for safety and regulatory purposes. Proper precautions must be taken when handling such materials.