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Implementation Guidelines for the Environmental Emergency Regulations 2011

Appendix 3

Schedule 1 of the Environmental Emergency Regulations

List of Substances in Alphabetical Order

Background

During the development of the 2003 version of the Environmental Emergency Regulations (E2 Regulations), the list of hazardous chemicals developed by the Conseil pour la réduction des accidents industriels majeurs (CRAIM) was selected as the best starting point for the Regulations. CRAIM had prepared a list of toxic and hazardous substances based on different sources, such as MIACC’s List 1 and List 2, as well as the U.S. Environmental Protection Agency’s Risk Management Program (RMP) list. Some of the nomenclature used in the original CRAIM list was modified to match those names most commonly used, as listed under the Transportation of Dangerous Goods Act, 1992 (TDGA). The TDGA list was not adopted in its entirety for the Regulations: its threshold quantities were intended to capture smaller quantities of transported substances that were considered too small to capture at the storage and chemical facilities covered by the E2 Regulations.

At the time of the publication of the original E2 Regulations in 2003, a total of 16 substances declared toxic under CEPA 1999 were included in Schedule 1 of the Regulations. Environment Canada made a commitment to stakeholders to evaluate 49 CEPA substances before publishing amendments to the E2 Regulations. Some of these CEPA 1999 substances are “classes of substances” that include several sub-compounds; consequently, a total of 94 substances were evaluated for possible inclusion in Schedule 1 of the E2 Regulations.

Based on the results of the evaluation of these substances, 30 substances and classes of substances and their respective thresholds are being added to Schedule 1 of the 2011 version of the E2 Regulations. Further, the regulated community requested that three substances of concern (acetic acid, ammonium nitrate and styrene) be evaluated for possible addition to Schedule 1 of the E2 Regulations. Environment Canada completed its evaluation and is adding these three substances to Schedule 1. Therefore, a total of 41 substances (33 substances and classes of substances representing different forms of the core 33 substances) and their respective thresholds have been added to Schedule 1 of the E2 Regulations.

Environment Canada has developed a rationale for the inclusion of the original 174 substances listed in Schedule 1 of the E2 Regulations. The justification for the specified threshold quantities is found in Rationale for the Development of a List of Regulated Substances under CEPA Section 200 and their Threshold Quantities.

The Chemical Abstracts Service registry numbers7 (CAS registry numbers) are the main identifier for the regulated substances found in the E2 Regulations. The use of these numbers, as well as the classification of the regulated substances according to their physical properties, was necessary for greater public understanding and clear communication. The United Nations identification numbers (UN numbers) have been removed from the E2 Regulations; however, they will remain referenced in Appendix 3 of the Implementation Guidelines. Periodic review and re-evaluation of the regulated list will be undertaken by Environment Canada for a continuous enhancement of the protection of the environment and human health.

Schedule 1 of the Regulations (Section 2, subsections 3(1), (2) and (5), 4(1) and 7(1))

List of Substances

Important

In the Implementation Guidelines, Schedule 1 substances are listed in alphabetical order and UN Number is added to the list. In the E2 Regulations, Schedule 1 substances are listed in order of CAS registry number.

Part 1 - Substances Likely to Explode
 Column 1Column 2Column 3 
#Name of SubstanceCAS Registry NumberConcentration (% by weight)Minimum Quantity (tonnes)UN Number
1acetaldehyde75-07-014.501089
2acetylene74-86-214.501001
3ammonium nitrate (in liquid form)6484-52-28120.001942, 2067-2072, 2426
4ammonium nitrate (in solid form)6484-52-26020.001942, 2067-2072, 2426
5ammonium perchlorate7790-98-913.401442
6benzene71-43-2110.001114
7bromotrifluoroethylene598-73-214.502419
81,3-butadiene106-99-014.501010
9Butane106-97-814.501011
101-buten-3-yne (vinyl acetylene)689-97-414.50no number
11cis-2-butene (2-butene-cis)590-18-114.501055
12trans-2-butene (2-butene-trans)624-64-614.501055
131-butene (alpha-butylene)106-98-914.501012
142-butene107-01-714.501055
15tert-butylamine (2-amino-2-methylpropane)75-64-91150.001125
16butylene (butene)25167-67-314.501012
17carbonyl sulphide (carbon oxysulfide)463-58-114.502204
18chlorine monoxide (dichlorine oxide)7791-21-114.50no number
192-chloropropane (isopropyl chloride)75-29-614.502356
201-chloropropene (1-chloropropylene)590-21-614.50no number
212-chloropropene (2-chloropropylene)557-98-214.502456
22cyanogen460-19-514.501026
23cyclohexane110-82-71550.001145
24cyclopropane75-19-414.501027
25dichlorosilane4109-96-014.502189
26difluoroethane (1,1-difluoroethane)75-37-614.501030
271,1-difluoroethylene (vinylidene fluoride)75-38-714.501959
28dimethyl ether (methyl ether)115-10-614.501033
29dimethyl sulphide75-18-31150.001164
30dimethylamine124-40-314.501032 & 1160
312,2-dimethylpropane463-82-114.502044
32ethane74-84-014.501035 & 1961
33ethyl chloride75-00-314.501037
34ethyl ether (diethyl ether)60-29-714.501155
35ethyl mercaptan75-08-114.502363
36ethyl nitrite109-95-514.501194
37ethylacetylene107-00-614.502452
38ethylamine75-04-714.501036 & 2270
39ethylbenzene100-41-417000.001175
40ethylene74-85-114.501038 & 1962
41gasoline (motor fuel)86290-81-51150.001203
42gasoline (unleaded)8006-61-91150.001203
43hydrogen1333-74-014.501049 & 1966
44hydrogen peroxide7722-84-1523.402015
45isobutane75-28-514.501969
46isobutylene (2-methylpropene)115-11-714.501055
47isopentane (2-methylbutane)78-78-414.501265
48isoprene78-79-514.501218
49isopropylamine75-31-014.501221
50liquefied natural gas8006-14-214.501972
51methane74-82-814.501971 & 1972
52methyl formate107-31-314.501243
532-methyl-1-butene563-46-214.502459
543-methyl-1-butene563-45-114.502561
55methylacetylene (propyne)74-99-714.501060
56methylamine74-89-514.501061
57naphtha8030-30-6150.001268
581,3-pentadiene504-60-914.50no number
59n-pentane (pentane)109-66-014.501265
60cis-2-pentene (beta-cis-amylene)627-20-314.50no number
61trans-2-pentene (trans-beta-amylene)646-04-814.50no number
621-pentene109-67-114.501108
63propadiene463-49-014.502200
64propane74-98-614.501978 & 1075
65propylene115-07-114.501077
66silane7803-62-514.502203
67sodium chlorate7775-09-91010.001495
68styrene100-42-5104.502055
69tetrafluoroethylene116-14-314.501081
70tetramethylsilane75-76-314.502749
71toluene108-88-312500.001294
72trichlorosilane10025-78-214.501295
73trifluorochloroethylene (chlorotrifluoroethylene)79-38-914.501082
74trimethylamine75-50-314.501083 & 1297
75vinyl chloride75-01-414.501086
76vinyl ethyl ether (ethyl vinyl ether)109-92-214.501302
77vinyl fluoride75-02-514.501860
78vinyl methyl ether107-25-514.501087
79vinylidene chloride75-35-414.501303
80xylenes1330-20-718000.001307
Part 2 - Substances Hazardous When Inhaled
Column 1Column 2Column 3 
#Name of SubstanceCAS Registry NumberConcentration (% by weight)Minimum Quantity (tonnes)UN Number
1acetic acid64-19-7956.802789, 2790
2acrolein107-02-8102.271092
3acrylonitrile107-13-1109.101093
4acryloyl chloride (acrylyl chloride)814-68-6102.27no number
5allyl alcohol107-18-6106.801098
6allyl chloride107-05-1109.101100
7allylamine107-11-9104.502334
8ammonia, anhydrous7664-41-7104.501005
9ammonia solution7664-41-7209.102073 & 2672
10arsenic trichloride (arsenous trichloride)7784-34-1106.801560
11arsine7784-42-110.452188
12bis(chloromethyl) ether [dichlorodimethyl ether]542-88-110.452249
13boron trichloride10294-34-5102.271741
14boron trifluoride7637-07-2102.271008
15boron trifluoride dimethyl etherate353-42-4106.802965
16bromine7726-95-6104.501744
17carbon disulphide75-15-0109.101131
18carbon monoxide630-08-0106.801016
19chlorine7782-50-5101.131017
20chlorine dioxide10049-04-410.45no number
21chloroform (trichloromethane)67-66-3109.101888
22chloromethyl methyl ether (methyl chloromethyl ether)107-30-2102.271239
23chloropicrin (trichloronitromethane)76-06-2102.271580
24chloropicrin (trichloronitromethane)7790-94-5102.271754
25crotonaldehyde4170-30-3109.101143
26cyanogen bromide506-68-3104.501143
27cyanogen chloride506-77-4104.501589
28cyclohexylamine108-91-8106.802357
29diborane19287-45-7101.131911
301,2-dichloroethane (ethylene dichloride)107-06-2106.801184
31dichloromethane (methylene chloride)75-09-219.101593
32dimethyldichlorosilane (dichlorodimethylsilane)75-78-5102.271162
331,1-dimethylhydrazine57-14-7106.801163
34epichlorohydrin106-89-8109.102023
35ethylene chlorohydrin (2-chloroethanol)107-07-3104.501135
36ethylene oxide75-21-8104.501040
37ethylenediamine107-15-3109.101604
38ethyleneimine151-56-4104.501185
39fluorine7782-41-410.451045
40formaldehyde, solution50-00-0106.801198 & 2209
41furan110-00-9102.272389
42hydrazine302-01-2106.802029
43hydrochloric acid7647-01-0306.801789
44hydrofluoric acid7664-39-3500.451790
45hydrogen bromide (hydrobromic acid)10035-10-6101.131048 & 1788
46hydrogen chloride, anhydrous7647-01-0102.272186 & 1050
47hydrogen cyanide (hydrocyanic acid)74-90-8101.131051 & 1613 & 1614
48hydrogen fluoride, anhydrous7664-39-310.451052
49hydrogen selenide7783-07-510.222202
50hydrogen sulphide7783-06-4104.501053
51iron pentacarbonyl13463-40-6101.131994
52isobutyronitrile78-82-0109.102284
53isopropyl chloroformate108-23-6106.802407
54ketene463-51-410.22no number
55mercury7439-97-6NA1.002809
56methyl bromide74-83-9102.271062
57methyl chloride74-87-3104.501063
58methyl chloroformate79-22-1102.271238
59methyl iodide74-88-4104.502644
60methyl isocyanate624-83-9104.502480
61methyl mercaptan74-93-1104.501064
62methyl thiocyanate556-64-9109.10no number
63methylacrylonitrile126-98-7104.503079
64methylhydrazine (monomethyl hydrazine)60-34-4106.801244
65methyltrichlorosilane75-79-6102.271250
66nickel carbonyl13463-39-310.451259
67nitric acid7697-37-2806.802031 & 2032
68nitric oxide (nitrogen monoxide)10102-43-9104.501660
69nitrogen dioxide10102-44-0101.131067
70osmium tetroxide20816-12-010.222471
71perchloromethyl mercaptan594-42-3104.501670
72perchloryl fluoride (trioxychlorofluoride)7616-94-6106.803083
73peroxyacetic acid (peracetic acid)79-21-0104.503107
74phenol108-95-2109.101671 & 2312 & 2821
75phosgene75-44-510.221076
76phosphine7803-51-2102.272199
77phosphorus oxychloride10025-87-3102.271810
78phosphorus trichloride7719-12-2106.801809
79phosphorus, white7723-14-0N/A1.002447
80piperidine110-89-4106.802401
81propionitrile107-12-0104.502404
82n-propyl chloroformate (propyl chloroformate)109-61-5106.802740
83propylene oxide75-56-9104.501280
84propyleneimine75-55-8104.501921
85stibine7803-52-3102.272676
86sulphur dioxide7446-09-5102.271079
87sulphur hexafluoride (sulfur hexafluoride)2551-62-4109.101080
88sulphur tetrafluoride7783-60-0101.132418
89sulphur trioxide7446-11-9104.501829
90sulphuric acid, fuming (oleum)8014-95-7N/A4.501831
91tetraethyl lead78-00-2102.271649
92tetramethyl lead75-74-1104.50no number
93tetranitromethane509-14-8104.501510
94thionyl chloride7719-09-7106.801836
95titanium tetrachloride7550-45-0101.131838
96toluene diisocyanate26471-62-5104.502078
97toluene-2,4-diisocyanate584-84-9104.502078
98toluene-2,6-diisocyanate91-08-7104.502078
99trans-crotonaldehyde123-73-9109.101143
100trimethylchlorosilane (chlorotrimethylsilane)75-77-4104.501298
101vinyl acetate108-05-4106.801301
Part 3 - Other Hazardous Substances
Column 1Column 2Column 3 
#Name of SubstanceCAS Registry NumberConcentration (% by weight)Minimum Quantity (tonnes)UN Number
1arsenic7440-38-2100.221558
2arsenic acid7778-39-4100.221553, 1554
3arsenic pentoxide1303-28-2100.221559
4arsenic trioxide (arsenic(III) oxide)1327-53-3100.221561
5cadmium chloride10108-64-2100.22no number
6cadmium oxide1306-19-0100.22no number
7cadmium sulphate (cadmium sulfate)10124-36-4100.22no number
8cadmium sulphide (cadmium sulfide)1306-23-6100.22no number
9chromic acid7738-94-5100.221463, 1755
10chromium trioxide1333-82-0100.221463, 1755
113,3’-dichlorobenzidine91-94-111.13no number
12naphthalene (in liquid form)91-20-3104.52304
13nickel acetate373-02-4100.22no number
14

nickel ammonium sulphate

(nickel ammonium sulfate)

15699-18-0100.22no number
15nickel carbonate3333-67-3100.22no number
16nickel chloride7718-54-9100.22no number
17nickel nitrate [nickel(II) nitrate]13138-45-9100.222725
18nickel(II) nitrate, hexahydrate13478-00-7100.222725
19nickel oxide1313-99-1100.22no number
20nickel(II) sulphate (nickel(II) sulfate)7786-81-4100.22no number
21nickel sulphate, hexahydrate (nickel(II) sulphate, hexahydrate)10101-97-0100.22no number
22nonylphenol (mixed isomer)25154-52-3101.13no number
23p-nonylphenol104-40-5101.13no number
244-tert-nonylphenol84852-15-3101.13no number
25potassium chromate7789-00-6100.22no number
26sodium arsenate, dibasic7778-43-0100.221685
27sodium arsenate, dibasic, heptahydrate10048-95-0100.221685
28sodium arsenite7784-46-5100.221686, 2027
29sodium chromate7775-11-3100.22no number
30sodium dichromate10588-01-9100.22no number
31tetrachloroethylene (perchloroethylene, Perc)127-18-411.131897
32tetrachloromethane (carbon tetrachloride)56-23-510.221846
33tributyl tetradecyl phosphonium chloride (TTPC)81741-28-8100.22no number
34trichloroethylene (TCE)79-01-611.131710

7 CAS Information is the property of the American Chemical Society and any use or redistribution, except as required in supporting regulatory requirements and/or reports to the government when the information and the reports are required by law or administrative policy is not permitted without the prior, written permission of the American Chemical Society