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

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==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:
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(a) for a gas or vapour,
 
(a) for a gas or vapour,
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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
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(b) for dust, mist or fume,
 
(b) for dust, mist or fume,
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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.
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Note: Y = actual number of hours of exposure duration.
 
Note: Y = actual number of hours of exposure duration.
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==WHMIS MSDS Reference Manual - Section 44==
 
==WHMIS MSDS Reference Manual - Section 44==
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*[[MSDS Authoring in Canada]]
 
*[[MSDS Authoring in Canada]]
 
*[[WHMIS Class D - Poisonous and Infectious Material]]
 
*[[WHMIS Class D - Poisonous and Infectious Material]]
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*[[WHMIS Canadian Industrial Chemical Label Compliance]]
  
  
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[[Category:MSDS Compliance|MSDS Compliance by Jurisdiction]]
 
[[Category:MSDS Compliance|MSDS Compliance by Jurisdiction]]
 
[[Category:WHMIS MSDS Compliance|WHMIS MSDS Compliance by Jurisdiction]]
 
[[Category:WHMIS MSDS Compliance|WHMIS MSDS Compliance by Jurisdiction]]
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[[Category:WHMIS Label Compliance|WHMIS Label Compliance]]

Latest revision as of 10:44, 29 April 2008

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