4 ms·
HS is funny stuff. Does nothing then zap, ur dead. UK figures for safe working concentration in air, from memory, hydrogen cyanide 11ppm, hydrogen sulphide 10p
by _a_a_a_ 3y ago
HS is funny stuff. Does nothing then zap, ur dead.
UK figures for safe working concentration in air, from memory, hydrogen cyanide 11ppm, hydrogen sulphide 10ppm