With about 30% H2SO4, about 5% nitric acid, and about 1% hydrochloric acid, what fire hazard category should this mixed acid be classified in?
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With about 30% H2SO4, about 5% nitric acid, and about 1% hydrochloric acid, what fire hazard category should this mixed acid be classified in?
The fire hazard of mixed acids depends primarily on their most flammable component, namely the content and properties of nitric acid. Although it contains only 5% nitric acid, it is a strong oxidizing agent and a flammable substance. Therefore, this mixed acid may be classified as a Category 3 hazardous material, namely a flammable liquid. The specific classification still requires more detailed safety data and test results. .
This may need to be examined from two aspects: 1. The concentration of nitric acid: Nitric acid is an oxidizing acid, and its oxidizing property determines the likelihood of combustion in organic materials. 2. The possibility that the three acids in the mixed acid can produce hydrogen gas when in contact with reactive metals
Cannot burn, Class 5. Concentrated nitric acid is classified as Category B due to its strong oxidizing properties, not because it is flammable.