Is it permissible to mix multipurpose dry chemicals with alkaline-based dry chemicals?

Mixing multipurpose dry chemicals with alkaline-based dry chemicals is prohibited because these substances can react negatively when combined, potentially creating hazardous situations or reducing the effectiveness of the extinguishing agents. Multipurpose dry chemical extinguishers typically contain ammonium phosphate, which is effective against class A, B, and C fires, while alkaline-based dry chemicals can contain different compounds that may not be compatible.

When these chemicals are mixed, there is a risk of creating toxic fumes or diminishing the suppression capabilities of the extinguishing agents. For safety and effectiveness in fire suppression, it's crucial to keep fire extinguishing agents separate and use them as they are intended. Proper training and understanding of the properties of fire extinguishing agents are important to ensure safe handling and effective fire response measures.