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Guidance for the Reporting of Tailings and Waste Rock to the National Pollutant Release Inventory (NPRI)

Appendix 2: 2006-2008 NPRI substances and reporting for tailings and waste rock

Part 1A Substances
Part 1B Substances
Part 2 Substances


Part 1A substances
NameCAS number(1)
Acetaldehyde75-07-0
Acetonitrile75-05-8
Acetophenone98-86-2
Acrolein107-02-8
Acrylamide79-06-1
Acrylic acid(2)79-10-7
Acrylonitrile107-13-1
Alkanes, C6-18, chloro68920-70-7
Alkanes, C10-13, chloro85535-84-8
Allyl alcohol107-18-6
Allyl chloride107-05-1
Aluminum(3)7429-90-5
Aluminum oxide(4)1344-28-1
Ammonia (total) (5)*
Aniline(2)62-53-3
Anthracene120-12-7
Antimony(6)*
Asbestos(7)1332-21-4
Benzene71-43-2
Benzoyl chloride98-88-4
Benzoyl peroxide94-36-0
Benzyl chloride100-44-7
Biphenyl92-52-4
Bis(2-ethylhexyl) adipate103-23-1
Bis(2-ethylhexyl) phthalate117-81-7
Boron trifluoride7637-07-2
Bromine7726-95-6
1-Bromo-2-chloroethane107-04-0
Bromomethane74-83-9
1,3-Butadiene106-99-0
2-Butoxyethanol111-76-2
Butyl acrylate141-32-2
i-Butyl alcohol78-83-1
n-Butyl alcohol71-36-3
sec-Butyl alcohol78-92-2
tert-Butyl alcohol75-65-0
Butyl benzyl phthalate85-68-7
1,2-Butylene oxide106-88-7
Butyraldehyde123-72-8
C.I. Acid Green 34680-78-8
C.I. Basic Green 4569-64-2
C.I. Basic Red 1989-38-8
C.I. Direct Blue 21828407-37-6
C.I. Disperse Yellow 32832-40-8
C.I. Food Red 1581-88-9
C.I. Solvent Orange 73118-97-6
C.I. Solvent Yellow 14842-07-9
Calcium cyanide156-62-7
Calcium fluoride7789-75-5
Carbon disulphide75-15-0
Carbon tetrachloride56-23-5
Carbonyl sulphide463-58-1
Catechol120-80-9
CFC-1175-69-4
CFC-1275-71-8
CFC-1375-72-9
CFC-11476-14-2
CFC-11576-15-3
Chlorendic acid115-28-6
Chlorine7782-50-5
Chlorine dioxide10049-04-4
Chloroacetic acid(2)79-11-8
Chlorobenzene108-90-7
Chloroethane75-00-3
Chloroform67-66-3
Chloromethane74-87-3
3-Chloro-2-methyl-1-propene563-47-3
3-Chloropropionitrile542-76-7
Chromium(8)*
Cobalt(6)*
Copper(6)*
Cresol(2, 9)1319-77-3
Crotonaldehyde4170-30-3
Cumene98-82-8
Cumene hydroperoxide80-15-9
Cyanides(10)*
Cyclohexane110-82-7
Cyclohexanol108-93-0
Decabromodiphenyl oxide1163-19-5
2,4-Diaminotoluene (2)95-80-7
2,6-Di-t-butyl-4-methylphenol128-37-0
Dibutyl phthalate84-74-2
o -Dichlorobenzene95-50-1
p -Dichlorobenzene106-46-7
3,3’-Dichlorobenzidine dihydrochloride612-83-9
1,2-Dichloroethane107-06-2
Dichloromethane75-09-2
2,4-Dichlorophenol (2)120-83-2
1,2-Dichloropropane78-87-5
Dicyclopentadiene77-73-6
Diethanolamine(2)111-42-2
Diethyl phthalate84-66-2
Diethyl sulphate64-67-5
Dimethylamine124-40-3
N,N-Dimethylaniline(2)121-69-7
N,N-Dimethylformamide68-12-2
Dimethyl phenol1300-71-6
Dimethyl phthalate131-11-3
Dimethyl sulphate77-78-1
4,6-Dinitro-o-cresol(2)534-52-1
2,4-Dinitrotoluene121-14-2
2,6-Dinitrotoluene606-20-2
Dinitrotoluene(11)25321-14-6
Di-n-octyl phthalate117-84-0
1,4-Dioxane123-91-1
Diphenylamine122-39-4
Epichlorohydrin106-89-8
2-Ethoxyethanol110-80-5
2-Ethoxyethyl acetate111-15-9
Ethyl acrylate140-88-5
Ethylbenzene100-41-4
Ethyl chloroformate541-41-3
Ethylene74-85-1
Ethylene glycol107-21-1
Ethylene oxide75-21-8
Ethylene thiourea96-45-7
Fluorine7782-41-4
Formaldehyde50-00-0
Formic acid64-18-6
Halon 1211353-59-3
Halon 130175-63-8
HCFC-2275-45-6
HCFC-122 and all isomers(12)41834-16-6
HCFC-123 and all isomers(13)34077-87-7
HCFC 124 and all isomers(14)63938-10-3
HCFC-141b1717-00-6
HCFC-142b75-68-3
Hexachlorocyclopentadiene77-47-4
Hexachloroethane67-72-1
Hexachlorophene70-30-4
n -Hexane110-54-3
Hydrazine(2)302-01-2
Hydrochloric acid7647-01-0
Hydrogen cyanide74-90-8
Hydrogen fluoride7664-39-3
Hydrogen sulphide7783-06-4
Hydroquinone(2)123-31-9
Iron pentacarbonyl13463-40-6
Isobutyraldehyde78-84-2
Isophorone diisocyanate4098-71-9
Isoprene78-79-5
Isopropyl alcohol67-63-0
p,p’-Isopropylidenediphenol80-05-7
Isosafrole120-58-1
Lithium carbonate554-13-2
Maleic anhydride108-31-6
Manganese(6)*
2-Mercaptobenzothiazole149-30-4
Methanol67-56-1
2-Methoxyethanol109-86-4
2-Methoxyethyl acetate110-49-6
Methyl acrylate96-33-3
Methyl tert-butyl ether1634-04-4
p,p’ -Methylenebis(2-chloroaniline)101-14-4
1,1‑Methylenebis (4-isocyanatocyclohexane)5124-30-1
Methylenebis (phenylisocyanate)101-68-8
p,p’ -Methylenedianiline101-77-9
Methyl ethyl ketone78-93-3
Methyl iodide74-88-4
Methyl isobutyl ketone108-10-1
Methyl methacrylate80-62-6
N-Methylolacrylamide924-42-5
2-Methylpyridine109-06-8
N-Methyl-2-pyrrolidone872-50-4
Michler’s ketone(2)90-94-8
Molybdenum trioxide1313-27-5
Naphthalene91-20-3
Nickel(6)*
Nitrate ion(15)*
Nitric acid7697-37-2
Nitrilotriacetic acid(2)139-13-9
p -Nitroaniline100-01-6
Nitrobenzene98-95-3
Nitroglycerin55-63-0
p -Nitrophenol(2)100-02-7
2-Nitropropane79-46-9
N-Nitrosodiphenylamine86-30-6
Nonylphenol and its ethoxylates(16)*
Octylphenol and its ethoxylates(17)*
Paraldehyde123-63-7
Pentachloroethane76-01-7
Peracetic acid(2)79-21-0
Phenol(2)108-95-2
p -Phenylenediamine(2)106-50-3
o -Phenylphenol(2)90-43-7
Phosgene75-44-5
Phosphorus(18)7723-14-0
Phosphorus (total) (19)*
Phthalic anhydride85-44-9
Polymeric diphenylmethane diisocyanate9016-87-9
Potassium bromate7758-01-2
Propargyl alcohol107-19-7
Propionaldehyde123-38-6
Propylene115-07-1
Propylene oxide75-56-9
Pyridine(2)110-86-1
Quinoline(2)91-22-5
p-Quinone106-51-4
Safrole94-59-7
Selenium(6)*
Silver(6)*
Sodium fluoride7681-49-4
Sodium nitrite7632-00-0
Styrene100-42-5
Styrene oxide96-09-3
Sulphurhexafluoride2551-62-4
Sulphuric acid7664-93-9
1,1,1,2-Tetrachloroethane630-20-6
1,1,2,2-Tetrachloroethane79-34-5
Tetrachloroethylene127-18-4
Tetracycline hydrochloride64-75-5
Thiourea62-56-6
Thorium dioxide1314-20-1
Titanium tetrachloride7550-45-0
Toluene108-88-3
Toluene-2,4-diisocyanate584-84-9
Toluene-2,6-diisocyanate91-08-7
Total reduced sulphur(20)*
1,2,4-Trichlorobenzene120-82-1
Toluenediisocyanate (11)26471-62-5
1,1,2-Trichloroethane79-00-5
Trichloroethylene79-01-6
Triethylamine121-44-8
1,2,4-Trimethylbenzene95-63-6
2,2,4-Trimethylhexamethylene diisocyanate16938-22-0
2,4,4-Trimethylhexamethylene diisocyanate15646-96-5
Vanadium(21)7440-62-2
Vinyl acetate108-05-4
Vinyl chloride75-01-4
Vinylidene chloride75-35-4
Xylene(22)1330-20-7
Zinc(6)*

Part 1B substances
NameCAS number
Mercury(6)*
Cadmium(6)*
Arsenic(6)*
Hexavalent chromium(6)*
Lead(23, 24)*
Tetraethyl lead78-00-2

Part 2 substances
NameCAS number
Acenaphthene83-32-9
Acenaphthylene208-96-8
Benzo(a)anthracene56-55-3
Benzo(a)phenanthrene218-01-9
Benzo(a)pyrene50-32-8
Benzo(b)fluoranthene205-99-2
Benzo(e)pyrene192-97-2
Benzo(g,h,i)perylene191-24-2
Benzo(j)fluoranthene205-82-3
Benzo(k)fluoranthene207-08-9
Dibenz(a,j)acridine224-42-0
Dibenzo(a,e)fluoranthene5385-75-1
Dibenzo(a,e)pyrene192-65-4
Dibenzo(a,h)acridine226-36-8
Dibenzo(a,h)anthracene53-70-3
Dibenzo(a,h)pyrene 189-64-0
Dibenzo(a,i)pyrene 189-55-9
Dibenzo(a,l)pyrene 191-30-0
7H-Dibenzo(c,g)carbazole 194-59-2
7,12-Dimethylbenz(a)anthracene  57-97-6
Fluoranthene 206-44-0
Fluorene86-73-7
Indeno(1,2,3-c,d)pyrene 193-39-5
3-Methylcholanthrene 56-49-5
5-Methylchrysene 3697-24-3
1-Nitropyrene 5522-43-0
Perylene 198-55-0
Phenanthrene 85-01-8
Pyrene 129-00-0


* No single CAS number applies to this NPRI listing.

(1) CAS Registry Number denotes the Chemical Abstracts Service Registry Number, as appropriate.

(2) “and its salts” – the CAS number corresponds to the weak acid or base. However, the substance includes the salts of these weak acids and bases. When calculating the weight of these substances and their salts, use the molecular weight of the acid or base, not the total weight of the salt.

(3) “fume or dust”

(4) “fibrous forms”

(5) “Ammonia (total)” means the total of both of ammonia (NH3 – CAS No. 7664-41-7) and the ammonium ion (NH4+) in solution.

(6) “an d its compounds”  

(7) “friable form”               

(8) “and its compounds” except hexavalent chromium compounds 

(9) “all isomers” including the individual isomers of cresol:  m-cresol (CAS No. 108-39-4), o-cresol (CAS No. 95-48-7) and p-cresol (CAS No. 106-44-5).     

(10) “ionic”

(11) “mixed isomers”

(12)  “all isomers” including, but not limited to, HCFC-122 (CAS No. 354-21-2).

(13) “all isomers” including, but not limited to, HCFC-123 (CAS No. 306-83-2) and HCFC 123a (CAS No. 90454-18-5).

(14) “all isomers” including, but not limited to, HCFC 124 (CAS No. 2837-89-0), and HCFC 124a (CAS No. 354-25-6).

(15) “in solution at a pH of 6.0 or greater”

(16)  Includes nonylphenol, its ethoxylates and derivatives with CAS numbers:  104-40-5; 25154-52-3; 84852-15-3; 1323-65-5; 26523-78-4; 28987-17-9; 68081-86-7; 68515-89-9; 68515-93-5; 104-35-8; 20427-84-3; 26027-38-3; 27177-05-5; 27177-08-8; 28679-13-2; 27986-36-3; 37251-69-7; 7311-27-5; 9016-45-9; 27176-93-8; 37340-60-6; 51811-79-1; 51938-25-1; 68412-53-3; 9051-57-4; 7205-87-1; 68412-54-4; 127087-87--1.

(17)  Includes octylphenol and its ethoxylates with CAS numbers: 140-66-9; 1806-26-4; 27193-28-8; 68987-90-6; 9002-93-1; 9036-19-5  

(18)  “yellow or white”        

(19)  Does not include phosphorus (yellow or white) with CAS No. 7723-14-0.               

(20)  This class of substances, expressed in terms of hydrogen sulphide, is restricted to the following substances:  hydrogen sulphide (CAS No. 7783-06-4), carbon disulphide (CAS No. 75-15-0), carbonyl sulphide (CAS No. 463-58-1), dimethyl sulphide (CAS No. 75-18-3), dimethyl disulphide (CAS No. 624-92-0), and methyl mercaptan (CAS No. 74-93-1).               

(21)  “(except when in an alloy) and its compounds”

(22)  “all isomers” including the individual isomers of xylene:  m-xylene (CAS No. 108-38-3), o-xylene (CAS No. 95-47-6) and p-xylene (CAS No. 106-42-3).

(23)  “and its compounds” except tetraethyl lead.

(24)  Does not include lead (and its compounds) contained in stainless steel, brass or bronze alloy.

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