Nitrososulfuric acid Fire hazard classification
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I encountered two seniors whose opinions didn’t match regarding whether a substance like nitrososulfuric acid falls under Category B, or whether it could be classified as Category E; this is related to the layout of distances between tanks
I think it should be Category B; it is a solid, and the hazard symbols are toxic and oxidizer. In the petrochemical regulations, the fire hazard of solids is referred to those in the building codes. It remains stable and does not decompose when used and stored at room temperature; it is also not a strong oxidizing agent. It meets the requirements specified in Article 3 of Category B in the building codes, and does not belong to the category of oxidizing agents in Category A.