Were all ancient firearm charges gunpowder?

It is gunpowder, but there is certainly a gap with the current gunpowder. Poison smoke cone with formula sulfur yellow fifteen two, flame nitrate one catty fourteen two, grass aconite five two, Ba Dou five two, wolfsbane five two, tung oil two and a half, two and a half small oil, charcoal five two, leaching two and a half, arsenic two two, yellow wax one or two, one point in one or two Zhu Zhu, one point in one or two Ma Ru. I don't know how active the thinking of the Song Dynasty was? What is the use of adding arsenic to gunpowder?