Fire hazard of sodium hydrosulfide
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Sodium hydrosulfide. Appearance and properties: White to colorless cubic crystals with a hydrogen sulfide odor; industrial products are generally solutions that are orange or yellow in color. It can catch fire spontaneously due to heat release from absorbing moisture in humid air. Flash point (°C): 90. It can be classified as Category C based on its flash point, but it can also be classified as Category A due to its spontaneous ignition property. Class A – this is the definition for its crystals. But its aqueous solution has certainly lost its spontaneous ignition property; then how should the fire hazard of such an aqueous solution be defined – as Class C? Class V? What do you gentlemen plan to do?
The aqueous solution of sodium hydrosulfide loses its spontaneous ignition property, and its fire hazard should be classified as Class C. .
Personally, I think aqueous solutions can be classified as Category C based on their flash point. Let’s see what others think: lol