Cl2 +Na2S===2NaCl+S
Cl2 +H2S===2HCl+S
S+H2===H2S
2S+C===CS2
S+Fe===FeS
S+2Cu===Cu2S
3S+2Al===Al2S3
S+Zn===ZnS
S+O2===SO2
S+6HNO3(浓)===H2SO4+6NO2+2H2O
3S+4 HNO3(稀)===3SO2+4NO+2H2O
H2S+Fe===FeS+H2
H2S+CuCl2===CuS+2HCl
H2S+2AgNO3===Ag2S+2HNO3
H2S+HgCl2===HgS+2HCl
H2S+Pb(NO3)2===PbS+2HNO3
2SO2+O2===2SO3
2SO2+O2+2H2O===2H2SO4
（这是SO2在大气中缓慢发生的环境化学反应）
SO2+Cl2+2H2O===H2SO4+2HCl
SO2+Br2+2H2O===H2SO4+2HBr
SO2+I2+2H2O===H2SO4+2HI
SO2+NO2===SO3+NO
SO2+2H2S===3S+2H2O
SO3+2KI===K2SO3+I2
SO2+2NH3+H2O===(NH4)2SO3