Rationale for list of regulated substances under Canadian Environmental Protection Act: exhibit 5


Exhibit 5: Threshold Calculation for Toxic Substances in CRAIM List Originating from MIACC Lists

Exhibit 5 - Threshold Calculation for Toxic Substances in CRAIM List Originating from MIACC Lists
  Chemical
  1,2-Dichloroethane 2- Chloroethanol Allyl chloride Carbon monoxide Chloropicrin
Physical state L L L G L
Basis for CRAIM Threshold Expert judgement Expert judgement Expert judgement Expert judgement Expert judgement
Level of Concern - Toxicity IDLH 1990 (gm/m3)   0.033 0.939 1.725 0.027
IDLH 1994 (gm/m3)          
IDLH 1997 (gm/m3)          
ERPG-2 1991 (gm/m3)          
ERPG-2 2002 (gm/m3) 0.810        
LC50 / 10 (gm/m3)          
LCLO / 10 (gm/m3)          
Mol wt 99.0 80.5 76.5 28.0 164.4
Boiling T (°C) 83 128.7 45 -191.7 112
V 0.098 0.076 0.092 1.000 0.125
IDLH Index 8.294 0.436 10.208 1.725 0.240
CRAIM TQ, Tonnes (lbs) 50 (110,000) 1.0 (2,200) 1.0 (2,200) 4.5 (10,000) 0.7 (1,540)
New TQ, Tonnes (lbs) 6.8 (15,000) 4.5 (10,000) 9.10 (20,000) 6.8 (15,000) 2.27 (5,000)
Comment Decrease TQ to 6,8 t (15,000 lbs) based on ERPG-2 (2002)  Raise TQ to 4.5 t (10,000 lbs) based on IDLH (1990) Raise TQ to 9.1 t (20,000 lbs) based on IDLH (1990) Raise TQ to 6.8 t (15,000 lbs) based on IDLH (1990) Raise TQ to 2.27 t (5,000 lbs) based on IDLH (1990)

Physical States :

  • L = liquid
  • G = gas
  • S = solid


Exhibit 5
Threshold Calculation for Toxic Substances in CRAIM List Originating from MIACC Lists (continued)
  Chemical
  Chlorosulfonic acid Cyanogen bromide Hydrobromic acid Ketene Mercury
Physical state L L G G L
Basis for CRAIM Threshold Expert judgement Expert judgement Expert judgement Expert judgement Expert judgement
Level of Concern - Toxicity IDLH 1990 (gm/m3)         0.028
IDLH 1994 (gm/m3)     0.0993 0.0094  
IDLH 1997 (gm/m3)          
ERPG-2 1991 (gm/m3) 0.0111        
ERPG-2 2002 (gm/m3)          
LC50 / 10 (gm/m3)          
LCLO / 10 (gm/m3)   0.03982      
Mol wt 116.5 105.9 80.9 42 200.6
Boiling T (°C) 152 62 -66.7 -56.1 356.7
V 0.091 0.109 1.000 1.000 0.089
IDLH Index 0.121 0.366 0.099 0.009 0.316
CRAIM TQ, Tonnes (lbs) 1.0 (2,200) 1.0 (2,200) 2.27 (5,000) 0.05 (110) 1.0 (2,200)
New TQ, Tonnes (lbs) 2.27 (5,000) 4.5 (10,000) 1.13 (2,500) 0.22 (500) 4.5 (10,000)
Comment Raise TQ to 2.27 t (5,000 lbs) based on ERPG-2 (1991) Raise TQ to 4.5 t (10,000 lbs) based on chemical repository 13 LCLO (92 ppm) divided by 10 Decrease TQ to 1.13 t (2,500 lbs) based on IDLH (1994) Raise TQ to 0.22 t (500 lbs) based on IDLH (1994) Raise TQ to 4.5 t (10,000 lbs) based on IDLH (1990)

Notes:

  • 1 ERPG-2 (1991)
  • 2 LCLO 10 min NTP Chemical Repositry 13 Aug. 2001 divided by 10
  • 3 IDLH (1994)
  • 4 IDLH (1994)

Physical States :

  • L = liquid
  • G = gas
  • S = solid


Exhibit 5
Threshold Calculation for Toxic Substances in CRAIM List Originating from MIACC Lists (continued)
  Chemical
  Methacrolein (Metha-crylaldehyde) Methacryloyloxyethyl isocyanate Methyl bromide Methyl iodide Methyl vinyl ketone
Physical state L L G L L
Basis for CRAIM Threshold Expert judgement Expert judgement Expert judgement Expert judgement Expert judgement
Level of Concern - Toxicity IDLH 1990 (gm/m3) N.A N.A 7.780 4.640 N.A.
IDLH 1994 (gm/m3)          
IDLH 1997 (gm/m3)          
ERPG-2 1991 (gm/m3)          
ERPG-2 2002 (gm/m3)          
LC50 / 10 (gm/m3)          
LCLO / 10 (gm/m3)          
Mol wt 70.1 155.2 95.0 141.9 70.1
Boiling T (°C) 68 211 3.33 42.8 80
V 0.081 0.095 1.000 0.140 0.077
IDLH Index N.A. N.A. 7.780 33.112 N.A.
CRAIM TQ, Tonnes (lbs) N.A. N.A. 1.14 3.4 (7,500) N.A.
New TQ, Tonnes (lbs) N.A. N.A. 6.8 (15,000) 9.10 (20,000) N.A.
Comment Removed based on CRAIM Board decision;
Essentially not in Canadian Commerce
Removed based on CRAIM Board decision;
Essentially not in Canadian Commerce
Raise TQ to 6.8 t (15,000 lbs) based on IDLH90 Raise TQ to 4.5 t (10,000 lbs) based on IDLH90 Removed based on CRAIM Board decision;
Essentially not in Canadian Commerce

Physical States :

  • L = liquid
  • G = gas
  • S = solid


Exhibit 5 - Threshold Calculation for Toxic Substances in CRAIM List Originating from MIACC Lists (continued)
  Chemical
  Nitrogen dioxide Osmium tetroxides Phenol Stibine Tetraethyl lead
Physical state G S L G L
Basis for CRAIM Threshold Expert judgement Expert judgement Expert judgement Expert judgement Expert judgement
Level of Concern - Toxicity IDLH 1990 (gm/m3) 0.094 0.001 0.963 0.204 0.040
IDLH 1994 (gm/m3)          
IDLH 1997 (gm/m3)          
ERPG-2 1991 (gm/m3          
ERPG-2 2002 (gm/m3)          
LC50 / 10 (gm/m3)          
LCLO / 10 (gm/m3)          
Mol wt 46 254.2 94.1 124.8 323.4
Boiling T (°C) 21.1 130 181.7 -18.3 108.9
V 1.000 1.000 0.074 1.000 0.197
IDLH Index 0.094 0.001 13.023 0.204 0.226
CRAIM TQ, Tonnes (lbs) 0.1 (220) 0.05 (110) 4.5 (10,000) 0.22 (500) 1.0 (2,200)
New TQ, Tonnes (lbs) 1.13 (2,500) 0.22 (500) 9.10 (20,000) 2.27 (5,000) 2.27 (5,000)
Comment Raise TQ to 1.13 t (2,500 lbs) based on IDLH (1990) Raise TQ to 0.22 t (500 lbs) based on IDLH (1990) Raise TQ to 9.1 t (20,000 lbs) based on IDLH (1990) Raise TQ to 2.27 t (5,000 lbs) based on IDLH (1990) Raise TQ to 2.27 t (5,000 lbs) based on IDLH (1990)

Physical States :

  • L = liquid
  • G = gas
  • S = solid


Exhibit 5 - Threshold Calculation for Toxic Substances in CRAIM List Originating from MIACC Lists (continued)
  Chemical
  Thionyl chloride Trioxychlorofluoride
Physical state L G
Basis for CRAIM Threshold Expert judgement Expert judgement
Level of Concern - Toxicity IDLH 1990 (gm/m3)    
IDLH 1994 (gm/m3)    
IDLH 1997 (gm/m3)   0.4196
ERPG-2 1991 (gm/m3)    
ERPG-2 2002 (gm/m3)    
LC50 / 10 (gm/m3) 0.2445  
LCLO / 10 (gm/m3)    
Mol wt 119.0 102.5
Boiling T (°C) 76.1 -46.7
V 0.113 1.000
IDLH Index 2.161 0.419
CRAIM TQ, Tonnes (lbs) 0.1 (220) 2.2 (5,000)
New TQ, Tonnes (lbs) 6.8 (15,000) 6.8 (15,000)
Comment Raise TQ to 6.8 t (15,000 lbs) based on RETC LC50 1 hour (500 ppm) divided by 10 Raise TQ to 6.8 t (15,000 lbs) based on IDLH (1990)

Notes:

  • 5 LC50 1 h (500 ppm) RETC July 2000 divided by 10
  • 6 IDLH (1997)

Physical States :

  • L = liquid
  • G = gas
  • S = solid


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