# List of additives used for fracking

The differences between additives for fracking in different countries are the type of chemicals used (hazardous, non-hazardous), the disclosure of chemicals and the composition of fracturing fluid. In 2010, Halliburton announced the creation of food additive based hydraulic fracturing fluid in response to calls for transparency and demand for a "more environmentally friendly" unconventional hydrocarbon production.

## Europe

In Europe, Poland, Norway and Germany have the largest reserves of shale gas, and drillings are underway.

## United Kingdom

In the United Kingdom, the environmental regulator permits only chemical additives which are classed as non hazardous to groundwater for fracturing fluids. Operators are required to disclose the content of hydraulic fracturing fluids to the relevant environment agency while the composition must be disclosed if the regulator demands it. The permitted additives for hydraulic fracturing fluid include polycrylamide, hydrochloric acid and a biocide.
| CAS number | Chemical constituent | Commercial use |
| 9003-05-8 | poly(2-prop-enamide)/polyacrylamide | EOR friction reducer |
| 7647-01-0 | Hydrochloric acid | Pre-fracturing to clean perforations, water pH adjuster |
| 14808-60-7 | Crystalline silica (quartz) | Proppant |
| 111-30-8 | Glutaraldehyde | Biocide |
| 7647-14-5 | Sodium chloride | Chem tracer |
| 7727-37-9 | Nitrogen | Waterless hydraulic fracturing |

## United States

In the US, about 750 compounds have been listed as additives for hydraulic fracturing, also known as ingredients of pressurized fracking fluid, in an industry report to the US Congress in 2011 The following is a partial list of the chemical constituents in additives that are used or may have been used in fracturing operations.
| CAS number | Chemical constituent | Commercial use |
| 2634-33-5 | 1,2-Benzisothiazolin-2-one / 1,2-benzisothiazolin-3-one | Insecticide spray, stain remover, biocide |
| 95-63-6 | 1,2,4-trimethylbenzene | Automatic transmission sealer |
| 123-91-1 | 1,4-Dioxane | Wood parquet adhesive |
| 3452-07-1 | 1-eicosene | Alpha olefin lubricant |
| 629-73-2 | 1-hexadecene | Alpha olefin lubricant |
| 112-88-9 | 1-octadecene | Alpha olefin lubricant |
| 1120-36-1 | 1-tetradecene | Stain remover |
| 10222-01-2 | 2,2 Dibromo-3-nitrilopropionamide | Biocide |
| 27776-21-2 | 2,2'-azobis-{2-(imidazlin-2-yl)propane}-dihydrochloride | No record |
| 73003-80-2 | 2,2-Dibromomalonamide | Biocide |
| 15214-89-8 | 2-Acrylamido-2-methylpropane sulphonic acid sodium salt polymer | Friction reducer |
| 46830-22-2 | 2-acryloyloxyethyl(benzyl)dimethylammonium chloride | No record |
| 52-51-7 | 2-Bromo-2-nitro-1,3-propanediol | Deodorant, conditioner |
| 111-76-2 | 2-Butoxy ethanol | Engine cleaner, degreaser, solvent |
| 1113-55-9 | 2-Dibromo-3-nitriloprionamide (2-monobromo-3-nitriilopropionamide) | No record |
| 104-76-7 | 2-Ethyl hexanol | Diesel fuel treatment, foam reducer |
| 67-63-0 | 2-Propanol / Isopropyl alcohol / isopropanol / propan-2-ol | Damar varnish, gloss, pour point reducer |
| 26062-79-3 | 2-Propen-1-aminium, N,N-dimethyl-N-2-propenyl-chloride, homopolymer | Volumizing conditioner |
| 9003-03-6 | 2-propenoic acid, homopolymer, ammonium salt | Moisturizer, sunscreen, friction reducer |
| 25987-30-8 | 2-Propenoic acid, polymer with 2 p-propenamide, sodium salt / copolymer of acrylamide and sodium acrylate | Friction reducer |
| 71050-62-9 | 2-Propenoic acid, polymer with sodium phosphinate (1:1) | No record |
| 66019-18-9 | 2-propenoic acid, telomer with sodium hydrogen sulfite | No record |
| 107-19-7 | 2-Propyn-1-ol / propargyl alcohol | No record |
| 51229-78-8 | 3,5,7-Triaza-1-azoniatricyclo[3.3.1.13,7]decane, 1-(3-chloro-2-propenyl)-chloride | Clean pressed powder |
| 115-19-5 | 3-methyl-1-butyn-3-ol | No record |
| 127087-87-0 | 4-Nonylphenol polyethylene glycol ether branched / nonylphenol ethoxylated / oxyalkylated phenol | Chrome wheel cleaner, wellbore/pipe cleaner, degreaser, emulsifier |
| 64-19-7 | Acetic acid | Silicone sealant |
| 68442-62-6 | Acetic acid, hydroxy-, reaction products with triethanolamine | No record |
| 108-24-7 | Acetic anhydride | No record |
| 67-64-1 | Acetone | Solvent, clear finish gloss |
| 38193-60-1 | Acrylamide – sodium 2-acrylamido-2-methylpropane sulfonate copolymer | Moisture, lotion, friction reducer |
| 25085-02-3 | Acrylamide – aodium acrylate copolymer or anionic polyacrylamide | Friction reducer |
| 25987-30-8 | 2-Propenoic acid, polymer with 2-propenamide, sodium salt | Friction reducer |
| 69418-26-4 | Acrylamide polymer with N,N,N-trimethyl-2[1-oxo-2-propenyl]oxy ethanaminium chloride | Friction reducer |
| 15085 | −02-3 Acrylamide-sodium acrylate copolymer | Friction reducer, flocculant |
| 68551-12-2 | Alcohols, C12-C16, ethoxylated (a.k.a. ethoxylated alcohol) | Floor cleaner, stain remover, wellbore cleaner, emulsifier |
| 64742-47-8 | Aliphatic hydrocarbon / hydrotreated light distillate / petroleum distillates / isoparaffinic solvent / paraffin solvent / napthenic solvent | Tar remover, lubricant |
| 64743-02-8 | Alkenes | No record |
| 68439-57-6 | Alkyl (C14-C16) olefin sulfonate, sodium salt | Car wash, dog shampoo, emulsifier |
| 9016-45-9 | Alkylphenol ethoxylate surfactants | Engine cleaner, rubber sealant, emulsifier |
| 1327-41-9 | Aluminum chloride | Antiperspirant |
| 73138-27-9 | Amines, C12-14-tert-alkyl, ethoxylated | No record |
| 71011-04-6 | Amines, ditallow alkyl, ethoxylated | No record |
| 68551-33-7 | Amines, tallow alkyl, ethoxylated, acetates | No record |
| 1336-21-6 | Ammonia | Stripper, glue, tire repair |
| 631-61-8 | Ammonium acetate | Haircolor shine |
| 68037-05-8 | Ammonium alcohol ether sulfate | No record |
| 7783-20-2 | Ammonium bisulfate | Ant killer, weed & moss control |
| 10192-30-0 | Ammonium bisulfite | Oxygen scavenger |
| 12125-02-9 | Ammonium chloride | Brass & copper polish, bleach |
| 7632-50-0 | Ammonium citrate | Iron remover |
| 37475-88-0 | Ammonium cumene sulfonate | No record |
| 1341-49-7 | Ammonium hydrogen-difluoride | Wheel cleaner, glass etching |
| 6484-52-2 | Ammonium nitrate | Moisture control, ink cartridge |
| 7727-54-0 | Ammonium persulfate / diammonium peroxidisulphate | Latex paint, maximizing powder, polymer breaker |
| 1762-95-4 | Ammonium thiocyanate | Liquid hide glue, biocide |
| 7664-41-7 | Aqueous ammonia | Paint stripper, caulk |
| 121888-68-4 | Bentonite, benzyl(hydrogenated tallow alkyl) dimethylammonium stearate complex / organophilic clay | Wine clearing agent, "detox" product, oil viscosifier |
| 71-43-2 | Benzene | Fuel system cleaner, degreaser |
| 119345-04-9 | Benzene, 1,1'-oxybis, tetratpropylene derivatives, sulfonated, sodium salts | Toilet cleaner, rust meutralizer |
| 74153-51-8 | Benzenemethanaminium, N,N-dimethyl-N-[2-[(1-oxo-2-propenyl)oxy]ethyl]-, chloride, polymer with 2-propenamide | No record |
| 10043-35-3 | Boric acid | Roach killer, stain remover, polymer crosslinker |
| 1303-86-2 | Boric oxide / boric anhydride | Carpenters glue, polymer crosslinker |
| 71-36-3 | Butan-1-ol | Interior/exterior paint, solvent |
| 68002-97-1 | C10–C16 ethoxylated alcohol | Floor finish remover, degreaser, wellbore cleaner |
| 68131-39-5 | C12–15 alcohol, ethoxylated | Graffiti remover, radiator flush, wellbore cleaner |
| 10043-52-4 | Calcium chloride | Chlorinating sanitizer, ice melt |
| 124-38-9 | Carbon dioxide | Penetrant, lubricator |
| 68130-15-4 | Carboxymethylhydroxypropyl guar | Viscosifier |
| 9012-54-8 | Cellulase / hemicellulase enzyme | Cellulose breaker |
| 9004-34-6 | Cellulose | Wellbore sealant |
| 10049-04-4 | Chlorine dioxide | Oxidizer |
| 77-92-9 | Citric acid | Acidizer and iron chelator |
| 94266-47-4 | Citrus terpenes | Degreaser |
| 61789-40-0 | Cocamidopropyl betaine | Foamer, wellbore cleaner |
| 68155-09-9 | Cocamidopropylamine oxide | Foamer, wellbore cleaner |
| 68424-94-2 | Coco-betaine | Foamer, wellbore cleaner |
| 7758-98-7 | Copper(II) sulfate | Fungicide |
| 31726-34-8 | Crissanol A-55 | |
| 14808-60-7 | Crystalline silica (quartz) | Sand |
| 7447-39-4 | Cupric chloride dihydrate | |
| 1120-24-7 | Decyldimethyl amine | |
| 2605-79-0 | Decyl-dimethyl amine oxide | |
| 3252-43-5 | Dibromoacetonitrile | |
| 25340-17-4 | Diethylbenzene | |
| 111-46-6 | Diethylene glycol | Solvent |
| 22042-96-2 | Diethylenetriamine penta (methylenephonic acid) sodium salt | |
| 28757-00-8 | Diisopropyl naphthalenesulfonic acid | |
| 68607-28-3 | Dimethylcocoamine, bis(chloroethyl) ether, diquaternary ammonium salt | |
| 7398-69-8 | Dimethyldiallylammonium chloride | Biocide |
| 25265-71-8 | Dipropylene glycol | Solvent |
| 139-33-3 | Disodium ethylene diamine tetra acetate | Metal ion chelator |
| 5989-27-5 | D-Limonene | Solvent |
| 123-01-3 | Dodecylbenzene | |
| 27176-87-0 | Dodecylbenzene sulfonic acid | |
| 42504-46-1 | Dodecylbenzenesulfonate isopropanolamine | Wellbore cleaner |
| 50-70-4 | D-Sorbitol / sorbitol | |
| 37288-54-3 | Endo-1,4-beta-mannanase, or hemicellulase | |
| 149879-98-1 | Erucic amidopropyl dimethyl betaine | |
| 89-65-6 | Erythorbic acid, anhydrous | |
| 54076-97-0 | Ethanaminium, N,N,N-trimethyl-2-[(1-oxo-2-propenyl)oxy]-, chloride, homopolymer | |
| 107-21 | −1 Ethane-1,2-diol / ethylene glycol | |
| 9002-93-1 | Ethoxylated 4-tert-octylphenol | |
| 68439-50-9 | Ethoxylated alcohol | Wellbore cleaner |
| 126950-60-5 | Ethoxylated alcohol | Wellbore cleaner |
| 67254-71-1 | Ethoxylated alcohol (C10-12) | Wellbore cleaner |
| 68951-67-7 | Ethoxylated alcohol (C14-15) | Wellbore cleaner |
| 68439-46-3 | Ethoxylated alcohol (C9-11) | Wellbore cleaner |
| 66455-15-0 | Ethoxylated alcohols | Wellbore cleaner |
| 84133-50-6 | Ethoxylated alcohols (C12-14 Secondary) | Wellbore cleaner |
| 68439-51-0 | Ethoxylated alcohols (C12-14) | Wellbore cleaner |
| 78330-21-9 | Ethoxylated branch alcohol | Wellbore cleaner |
| 34398-01-1 | Ethoxylated C11 alcohol | Wellbore cleaner |
| 61791-12-6 | Ethoxylated Castor Oil | Wellbore cleaner |
| 61791-29-5 | Ethoxylated fatty acid, coco | Wellbore cleaner |
| 61791-08-0 | Ethoxylated fatty acid, coco, reaction product with ethanolamine | Wellbore cleaner |
| 68439-45-2 | Ethoxylated hexanol | Wellbore cleaner |
| 9036-19-5 | Ethoxylated octylphenol | Wellbore cleaner |
| 9005-67-8 | Ethoxylated Sorbitan Monostearate | Dispersant, wellbore cleaner |
| 9004-70-3 | Ethoxylated Sorbitan Trioleate | Dispersant, wellbore cleaner |
| 64-17-5 | Ethyl alcohol / ethanol | Solvent, pour point fepressant |
| 100-41-4 | Ethyl nenzene | |
| 97-64-3 | Ethyl lactate | |
| 9003-11-6 | Ethylene nlycol–propylene glycol copolymer (oxirane, methyl-, polymer with oxirane) | |
| 75-21-8 | Ethylene oxide | |
| 5877-42-9 | Ethyloctynol | |
| 68526-86-3 | Exxal 13 | |
| 61790-12-3 | Fatty acids | |
| 68188-40-9 | Fatty acids, tall oil reaction products w/ acetophenone, formaldehyde & thiourea | |
| 9043-30-5 | Fatty alcohol polyglycol ether surfactant | |
| 7705-08-0 | Ferric chloride | |
| 7782-63-0 | Ferrous sulfate, heptahydrate | |
| 50-00-0 | Formaldehyde | |
| 29316-47-0 | Formaldehyde polymer with 4,1,1-dimethylethyl phenolmethyl oxirane | |
| 153795-76-7 | Formaldehyde, polymers with branched 4-nonylphenol, ethylene oxide and propylene oxide | |
| 75-12-7 | Formamide | |
| 64-18-6 | Formic acid | |
| 110-17-8 | Fumaric acid | |
| 65997-17-3 | Glassy calcium magnesium phosphate | |
| 111-30-8 | Glutaraldehyde | Biocide |
| 56-81-5 | Glycerol / glycerine | |
| 9000-30-0 | Guar Gum | Viscosifier |
| 64742-94-5 | Heavy aromatic petroleum naphtha | |
| 9025-56-3 | Hemicellulase | |
| 7647-01-0 | Hydrochloric acid / hydrogen chloride / muriatic acid | Toilet bowl cleaner |
| 7722-84-1 | Hydrogen peroxide | Oxidizer, polymer breaker |
| 79-14-1 | Hydroxy acetic acid | |
| 35249-89-9 | Hydroxyacetic acid ammonium salt | |
| 9004-62-0 | Hydroxyethyl cellulose | Viscosifier |
| 5470-11-1 | Hydroxylamine hydrochloride | |
| 39421-75-5 | Hydroxypropyl guar | Viscosifier |
| 35674-56-7 | Isomeric aromatic ammonium salt | |
| 64742-88-7 | Isoparaffinic petroleum hydrocarbons, synthetic | |
| 64-63-0 | Isopropanol | Solvent, pour point depressant |
| 98-82-8 | Isopropylbenzene (cumene) | |
| 68909-80-8 | Isoquinoline, reaction products with benzyl chloride and quinoline | |
| 8008-20-6 | Kerosene | |
| 64742-81-0 | Kerosine, hydrodesulfurized | |
| 63-42-3 | Lactose | |
| 64742-95-6 | Light aromatic solvent naphtha | |
| 1120-21-4 | Light paraffin oil | |
| 14807-96-6 | Magnesium silicate hydrate (talc) | Grinding aid |
| 1184-78-7 | Methanamine, N,N-dimethyl-, N-oxide | |
| 67-56-1 | Methanol | |
| 68891-11-2 | Methyloxirane polymer with oxirane, mono (nonylphenol) ether, branched | |
| 8052-41-3 | Mineral spirits / Stoddard solvent | |
| 141-43-5 | Monoethanolamine | pH buffer |
| 44992-01-0 | N,N,N-trimethyl-2[1-oxo-2-propenyl]oxy ethanaminium chloride | |
| 64742-48-9 | Naphtha (petroleum), hydrotreated heavy | |
| 91-20-3 | Naphthalene | |
| 38640-62-9 | Naphthalene bis(1-methylethyl) | |
| 93-18-5 | Naphthalene, 2-ethoxy- | |
| 68909-18-2 | N-benzyl-alkyl-pyridinium chloride | |
| 68139-30-0 | N-Cocoamidopropyl-N,N-dimethyl-N-2-hydroxypropylsulfobetaine | Wellbore cleaner |
| 7727-37-9 | Nitrogen, liquid form | |
| 68412-54-4 | Nonylphenol polyethoxylate | Wellbore cleaner |
| 121888-66-2 | Organophilic clays | Oil viscosifier |
| 64742-65-0 | Petroleum base oil | |
| 64741-68-0 | Petroleum naphtha | |
| 70714-66-8 | Phosphonic acid, (phosphonomethyl)iminobis2,1-ethanediylnitrilobis(methylene)tetrakis-, ammonium salt | |
| 8000-41-7 | Pine oil | |
| 60828-78-6 | Poly(oxy-1,2-ethanediyl), a-[3,5-dimethyl-1-(2-methylpropyl)hexyl]-w-hydroxy- | Wellbore cleaner |
| 25322-68-3 | Poly(oxy-1,2-ethanediyl), a-hydro-w-hydroxy / Polyethylene Glycol | Wellbore cleaner |
| 24938-91-8 | Poly(oxy-1,2-ethanediyl), α-tridecyl-ω-hydroxy- | Wellbore cleaner |
| 51838-31-4 | Polyepichlorohydrin, trimethylamine quaternized | |
| 56449-46-8 | Polyethlene glycol oleate ester | Lubricant |
| 62649-23-4 | Polymer with 2-propenoic acid and sodium 2-propenoate | |
| 9005-65-6 | Polyoxyethylene Sorbitan Monooleate | Dispersant |
| 61791-26-2 | Polyoxylated fatty amine salt | |
| 127-08-2 | Potassium acetate | |
| 12712-38-8 | Potassium borate | Crosslinker |
| 1332-77-0 | Potassium borate | Crosslinker |
| 20786-60-1 | Potassium Borate | Crosslinker |
| 584-08-7 | Potassium carbonate | |
| 7447-40-7 | Potassium chloride | |
| 590-29-4 | Potassium formate | |
| 1310-58-3 | Potassium hydroxide | |
| 13709-94-9 | Potassium metaborate | |
| 24634-61-5 | Potassium sorbate | Anti-oxidant |
| 112926-00-8 | Precipitated silica / silica gel | |
| 57-55-6 | Propane-1,2-diol, or Propylene glycol | |
| 107-98-2 | Propylene glycol monomethyl ether | Solvent |
| 68953-58-2 | Quaternary Ammonium Compounds | |
| 62763-89-7 | Quinoline,2-methyl-, hydrochloride | |
| 15619-48-4 | Quinolinium, 1-(phenylmethl),chloride | |
| 7631-86-9 | Silica, Dissolved | |
| 5324-84-5 | Sodium 1-octanesulfonate | |
| 127-09-3 | Sodium acetate | |
| 95371-16-7 | Sodium Alpha-olefin sulfonate | |
| 532-32-1 | Sodium benzoate | |
| 144-55-8 | Sodium bicarbonate | |
| 7631-90-5 | Sodium bisulfate | |
| 7647-15-6 | Sodium bromide | |
| 497-19-8 | Sodium carbonate | |
| 7647-14-5 | Sodium chloride | Table salt |
| 7758-19-2 | Sodium chlorite | |
| 3926-62-3 | Sodium chloroacetate | |
| 68-04-2 | Sodium citrate | |
| 6381-77-7 | Sodium erythorbate / isoascorbic acid, sodium salt | |
| 2836-32-0 | Sodium glycolate | |
| 1310-73-2 | Sodium hydroxide | |
| 7681-52-9 | Sodium hypochlorite | Bleach |
| 7775-19-1 | Sodium metaborate .8H2O | Crosslinker |
| 10486-00-7 | Sodium perborate tetrahydrate | Oxidizer |
| 7775-27-1 | Sodium persulfate | Oxidizer |
| 9003-04-7 | Sodium polyacrylate | Dispersant, flocculant |
| 7757-82-6 | Sodium sulfate | |
| 1303-96-4 | Sodium tetraborate decahydrate | Crosslinker |
| 7772-98-7 | Sodium thiosulfate | |
| 1338-43-8 | Sorbitan monooleate | Dispersant |
| 57-50-1 | Sucrose | Table sugar |
| 5329-14-6 | Sulfamic acid | pH adjuster |
| 112945-52-5 | Synthetic amorphous / pyrogenic silica / amorphous silica | |
| 68155-20-4 | Tall oil fatty acid diethanolamine | Foamer, wellbore cleaner |
| 8052-48-0 | Tallow fatty acids sodium salt | Soap |
| 72480-70-7 | Tar bases, quinoline derivs., benzyl chloride-quaternized | |
| 68647-72-3 | Terpene and terpenoids | Solvent |
| 68956-56-9 | Terpene hydrocarbon byproducts | Solvent |
| 533-74-4 | Tetrahydro-3,5-dimethyl-2H-1,3,5-thiadiazine-2-thione (a.k.a. Dazomet) | Biocide |
| 55566-30-8 | Tetrakis(hydroxymethyl)phosphonium sulfate (THPS) | Biocide |
| 75-57-0 | Tetramethyl ammonium chloride | |
| 64-02-8 | Tetrasodium ethylenediaminetetraacetate | |
| 68-11-1 | Thioglycolic acid | |
| 62-56-6 | Thiourea | |
| 68527-49-1 | Thiourea, polymer with formaldehyde and 1-phenylethanone | |
| 108-88-3 | Toluene | |
| 81741-28-8 | Tributyl tetradecyl phosphonium chloride | |
| 68299-02-5 | Triethanolamine hydroxyacetate | |
| 112-27-6 | Triethylene glycol | |
| 52624-57-4 | Trimethylolpropane, ethoxylated, propoxylated | |
| 150-38-9 | Trisodium ethylenediaminetetraacetate | |
| 5064-31-3 | Trisodium nitrilotriacetate | |
| 7601-54-9 | Trisodium orthophosphate | |
| 57-13-6 | Urea | |
| 25038-72-6 | Vinylidene chloride/methylacrylate copolymer | |
| 7732-18-5 | Water | Deionized water |
| 1330-20-7 | Xylene | Carburetor cleaner, asphalt primer, solvent |
| 068604-95-5 | Aliphatic acids | Wall & trim enamel |
| 078330-20-8 | Aliphatic ethoxylated alcohols | Leather cleaner |
| 000000-33-9 | Alkyl aryl polyethoxy alcohols | Coppersmiths polish |
| 000000-17-6 | Alkylaryl sulfonate | Detergent, stain remover |
| 064742-47-8 | Distillates, petroleum, hydrotreated light | Tar remover, sealant |
| 000110-43-0 | Methyl n-amyl & ethyl ketones | Hobby cement, sealant |
| | Oxyalkylated alkylphenol | |
| | Petroleum distillate blend | |
| | Polyethoxylated alkanol | |
| | Polymeric hydrocarbons | |
| | Salt of amine-carbonyl condensate | |
| | Salt of fatty acid/polyamine reaction product | |