VOCs: definitions and exclusions

The definition for volatile organic compounds (VOC) comes from the Order adding toxic substances to Schedule 1 to the Canadian Environmental Protection Act, 1999, section 1, published in the Canada Gazette, Part II, July 2, 2003 and its amendment published June 3, 2016.

Note: This definition excludes substances from consideration, but does not directly name substances that are VOCs. The Annual Guide for Reporting to the National Pollutant Release Inventory explains VOCs in greater detail. The substances listed below are not to be considered in calculating VOC for the purposes of NPRI reporting.

Definition of VOC

Volatile organic compounds that participate in atmospheric photochemical reactions, excluding the following:

Substances not considered VOC
Name of substance or group of substances CAS No.
(a) methane 74-82-8
(b) ethane 74-84-0
(c) methylene chloride (dichloromethane) 75-09-2
(d) 1,1,1-trichloroethane (methyl chloroform) 71-55-6
(e) 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) 76-13-1
(f) trichlorofluoromethane (CFC-11) 75-69-4
(g) dichlorodifluoromethane (CFC-12) 75-71-8
(h) chlorodifluoromethane (HCFC-22) 75-45-6
(i) trifluoromethane (HFC-23) 75-46-7
(j) 1,2-dichloro-1,1,2,2-tetrafluoroethane (CFC-114) 76-14-2
(k) chloropentafluoroethane (CFC-115) 76-15-3
(l) 1,1,1-trifluoro-2,2-dichloroethane (HCFC-123) 306-83-2
(m) 1,1,1,2-tetrafluoroethane (HFC-134a) 811-97-2
(n) 1,1-dichloro-1-fluoroethane (HCFC-141b) 1717-00-6
(o) 1-chloro-1,1-difluoroethane (HCFC-142b) 75-68-3
(p) 2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124) 2837-89-0
(q) pentafluoroethane (HFC-125) 354-33-6
(r) 1,1,2,2-tetrafluoroethane (HFC-134) 359-35-3
(s) 1,1,1-trifluoroethane (HFC-143a) 420-46-2
(t) 1,1-difluoroethane (HFC-152a) 75-37-6
(u) parachlorobenzotrifluoride (PCBTF) 98-56-6
(v) cyclic, branched, or linear completely methylated siloxanes various
(w) acetone 67-64-1
(x) perchloroethylene (tetrachloroethylene) 127-18-4
(y) 3,3-dichloro-1,1,1,2,2-pentafluoropropane (HCFC-225ca) 422-56-0
(z) 1,3-dichloro-1,1,2,2,3-pentafluoropropane (HCFC-225cb) 507-55-1
(z.1) 1,1,1,2,3,4,4,5,5,5-decafluoropentane (HFC-43-10mee) 138495-42-8
(z.2) difluoromethane (HFC-32) 75-10-5
(z.3) ethylfluoride (HFC-161) 353-36-6
(z.4) 1,1,1,3,3,3-hexafluoropropane (HFC-236fa) 690-39-1
(z.5) 1,1,2,2,3-pentafluoropropane (HFC-245ca) 679-86-7
(z.6) 1,1,2,3,3-pentafluoropropane (HFC-245ea) 24270-66-4
(z.7) 1,1,1,2,3-pentafluoropropane (HFC-245eb) 431-31-2
(z.8) 1,1,1,3,3-pentafluoropropane (HFC-245fa) 460-73-1
(z.9) 1,1,1,2,3,3-hexafluoropropane (HFC-236ea) 431-63-0
(z.10) 1,1,1,3,3-pentafluorobutane (HFC-365mfc) 406-58-6
(z.11) chlorofluoromethane (HCFC-31) 593-70-4
(z.12) 1-chloro-1-fluoroethane (HCFC-151a) 1615-75-4
(z.13) 1,2-dichloro-1,1,2-trifluoroethane (HCFC-123a) 354-23-4
(z.14) 1,1,1,2,2,3,3,4,4-nonafluoro-4-methoxy-butane (C4F9OCH3) 163702-07-6
(z.15) 2-(difluoromethoxymethyl)-1,1,1,2,3,3,3-heptafluoropropane ( (CF3)2CFCF2OCH3) 163702-08-7
(z.16) 1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane (C4F9OC2H5) 163702-05-4
(z.17) 2-(ethoxydifluoromethyl)-1,1,1,2,3,3,3-heptafluoropropane ( (CF3)2CFCF2OC2H5) 163702-06-5

(z.18) methyl acetate and perfluorocarbon compounds that fall into the following classes, namely,

  1. i. cyclic, branched or linear completely fluorinated alkanes,
  2. ii. cyclic, branched, or linear completely fluorinated ethers with no unsaturations,
  3. iii. cyclic, branched or linear completely fluorinated tertiary amines with no unsaturations, or
  4. iv. sulfur containing perfluorocarbons with no unsaturations and with sulfur bonds only to carbon and fluorine.
  79-20-9 (and various)
*(z.19) 1,1,1,2,2,3,3-heptafluoro-3-methoxy-propane (HFE-7000); 375-03-1
*(z.20) 3-ethoxy-1,1,1,2,3,4,4,5,5,6,6,6-dodecafluoro-2-(trifluoromethyl) hexane (HFE-7500); 297730-93-9
*(z.21) 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea); 431-89-0
*(z.22) methyl formate (HCOOCH3); 107-31-3
*(z.23) t-butyl acetate; 540-88-5
*(z.24) 1,1,1,2,2,3,4,5,5,5-decafluoro-3-methoxy-4-trifluoromethyl-pentane (HFE-7300); 132182-92-4
*(z.25) propylene carbonate; 108-32-7
*(z.26) dimethyl carbonate; 616-38-6
*(z.27) trans-1,3,3,3-tetrafluoropropene (HFO-1234ze); 29118-24-9
*(z.28) HCF2OCF2H (HFE-134); 1691-17-4
*(z.29) HCF2OCF2OCF2H (HFE-236cal2); 78522-47-1
*(z.30) HCF2OCF2CF2OCF2H (HFE-338pcc13); 188690-78-0
*(z.31) HCF2OCF2OCF2CF2OCF2H; 188690-77-9
*(z.32) 2,3,3,3-tetrafluoropropene (HFO-1234yf); 754-12-1
*(z.33) trans 1-chloro-3,3,3-trifluoroprop-1-ene [HCFO-1233zd(E)]; and 102687-65-0
*(z.34) 2-amino-2-methyl-1-propanol. 124-68-5

*The volatile organic compound (VOC) definition as listed on Schedule 1 of the Canadian Environmental Protection Act, 1999 was amended as of June 15, 2016. This amendment added these 16 compounds to the exclusion list of the VOC definition.

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