Elemental sulphur is not toxic, but many simple sulphur derivates are, such as sulphur dioxide (SO2) and hydrogen sulphide (H2S)
pure elemental sulpher is non toxic. but many derivatives such as SO2, H2S, H2SO4 and other Sulphates are poisonous. h2so4 being an acid corrodes the mucosa of oesophagus and gastric mucosa.
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