Difference between revisions of "WHMIS Class D - Formulae for Equivalent LC50"

From NexregWiki
Jump to: navigation, search
Line 7: Line 7:
 
==CPR: Section 44: Formulae for Equivalent LC50  ==
 
==CPR: Section 44: Formulae for Equivalent LC50  ==
 
For the purpose of establishing that a product, material or substance falls into Division 1 of Class D - Poisonous and Infectious Material, an LC<sub>50</sub> that is obtained in an animal assay at an exposure duration of other than four hours may be converted to an LC<sub>50</sub> equivalent to an exposure duration of four hours by using the following formulae:
 
For the purpose of establishing that a product, material or substance falls into Division 1 of Class D - Poisonous and Infectious Material, an LC<sub>50</sub> that is obtained in an animal assay at an exposure duration of other than four hours may be converted to an LC<sub>50</sub> equivalent to an exposure duration of four hours by using the following formulae:
 +
  
 
(a) for a gas or vapour,
 
(a) for a gas or vapour,
 +
  
 
LC<sub>50</sub> at Y hours &#215; <sup>(Y&#160;hours)&#189;</sup>/<sub>2</sub> = LC<sub>50</sub> at 4 hours; and
 
LC<sub>50</sub> at Y hours &#215; <sup>(Y&#160;hours)&#189;</sup>/<sub>2</sub> = LC<sub>50</sub> at 4 hours; and
 +
  
 
(b) for dust, mist or fume,
 
(b) for dust, mist or fume,
 +
  
 
LC<sub>50</sub> at Y hours &#215; <sup>(Y&#160;hours)</sup>/<sub>4</sub> = LC<sub>50</sub> at 4 hours.
 
LC<sub>50</sub> at Y hours &#215; <sup>(Y&#160;hours)</sup>/<sub>4</sub> = LC<sub>50</sub> at 4 hours.
 +
  
 
Note: Y = actual number of hours of exposure duration.
 
Note: Y = actual number of hours of exposure duration.
 +
  
 
==WHMIS MSDS Reference Manual - Section 44==
 
==WHMIS MSDS Reference Manual - Section 44==

Revision as of 11:41, 28 April 2008

Personal tools
Namespaces

Variants
Actions
Navigation
Toolbox