| HS•/S•− + AH → H2S/HS− + A• | (3) | |
| HS•/S•− + HS•/S•− → HSSH/HSS– | k = 6.5 × 109 M–1 s–1 [98] | (4) |
| HS•/S•− + HS− ⇌ HSS•2− | kf = 5.4 × 109 M–1 s–1; kr = 5.3 × 105 s–1 [98] | (5) |
| HSS•2– + O2 → HSS– + O2•− | k = 4 × 108 M–1 s–1 [98] | (6) |
| HS•/S•− + O2 → SO2•− | k = 7.5 × 109 M–1 s–1 [98] | (7) |
| SO2•− + O2 → SO2 + O2•− | k = 1 × 108 M–1 s–1 [99] | (8) |
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