Useful information on toxicity and confined spaces

Useful information on toxicity and confined spaces Acute LD 50s of some chemical compounds  

12-16 Pulse increases, muscular coordination disturbed. Normal flames go out 

Less than 6% Gasping and collapse, heart stops 

These can occur in closed spaces where rusting, etc., has consumed oxygen or where an inert gas (nitrogen, argon) has diluted the oxygen level. See Table 9.5. 

ACGIH (current biennial edition). Industrial Ventilation. Cincinnati ACGIH, for illustrations on industrial ventilation solutions. 

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