6 Colo. Code Regs. § 1010-6-A
Appendix A - Prohibited Chemicals | |||
Name | Formula | CAS # | Hazard* |
2-Butanol (sec-Butyl Alcohol) | C2H5CH(OH)CH3 | 78-92-2 | may form explosive peroxides upon concentration |
Acetal (1,1-Diethoxyethane) | C6H14O2 | 105-57-7 | may form explosive peroxides upon concentration; toxic |
Acetaldehyde (Ethanal) | CH3CHO | 75-07-0 | may form explosive peroxides upon concentration; possibly carcinogenic to humans; highly flammable |
Acetyl Halides (e.g., Acetyl Fluoride, Acetyl Chloride, Acetyl Bromide, Acetyl Iodide) | respiratory irritant, toxic; violent reaction with water; dangerous fire risk | ||
Acetyl Nitrate | CH3CONO3 | 591-09-3 | shock sensitive |
Acrolein | CH2CHCHO | 107-02-8 | flammable and reactive; may be fatal if ingested, inhaled, or absorbed through the skin |
Acrylic Acid (Propenoic Acid) | H2CCHCO2H | 79-10-7 | may form explosive peroxides; reactive; corrosive |
Acrylonitrile | CH2CHCN | 107-13-1 | may form explosive peroxides; possibly carcinogenic to humans; flammable; reactive |
Alcohols (Allylic, Benzylic) Note: Alcohols are referred to as allylic or benzylic if the hydroxyl group is bonded to an allylic carbon atom (adjacent to a C=C double bond) or a benzylic carbon atom (next to a benzene ring), respectively. (e.g., 3-penten-2-ol; 2-propen-1-ol (allyl alcohol), 1-phenylethanol, phenylmethanol (benzyl alcohol), diphenylmethanol (diphenylcarbinol), triphenylmethanol (triphenylcarbinol)). | may form explosive peroxides upon concentration | ||
Alkyl-Substituted Cycloaliphatics Note: Methyl-, ethyl-, propyl-, butyl-are common alkyl substituents. A cycloaliphatic is a cyclic hydrocarbon such as cyclopropane, cyclobutane, or cyclohexane (e.g., tert-butylcycloheptane or 1-cyclobutyl-4-methylpentane). | may form explosive peroxides upon concentration | ||
Aluminum Phosphide | AlP | 20859-73-8 | water-reactive; generates poisonous and explosive gas when in contact with air or moisture |
Amatol (TNT and Ammonium Nitrate mixture) | explosive | ||
Ammonal (TNT, Ammonium Nitrate, and Aluminum Powder Mixture) | explosive | ||
Ammonium Bromate | NH4BrO3 | 13843-59-9 | shock sensitive |
Ammonium Chlorate | NH4ClO3 | 10192-29-7 | strong oxidizer; explosive |
Ammonium Hexanitrocobaltate | NH3Co(NO2)6 | 13600-98-1 | explosive |
Ammonium Nitrite | NH4NO2 | 13446-48-5 | explosive |
Ammonium Perchlorate | NH4ClO4 | 7790-98-9 | strong oxidizer; explosive; irritant |
Ammonium Periodate | NH4IO4 | 13446-11-2 | strong oxidizer; explosive; irritant; inhalation hazard |
Ammonium Permanganate | NH4MnO4 | 13446-10-1 | explosive |
Ammonium Tetraperoxychromate | (NH4)3CrO8 | explosive | |
Antimony Compounds (e.g., triethyl stibine, tripropyl stibine, trivinyl stibine, antimony trichloride, antimony pentachloride, nickel antimonide) | dust fire and explosion hazard; poison; corrosive; reactive; some antimony compounds are possibly carcinogenic to humans | ||
Arsenic and Arsenic Compounds (e.g., lead arsenate, sodium arsenate, sodium arsenite, Trisilyl Arsine, arsine, arsenic trioxide) | carcinogenic to humans; poison | ||
Azide Compounds (e.g., hydrogen azide, sodium azide, copper azide, lead (dinitride) azide) | acutely toxic; shock sensitive; explosive | ||
Azidocarbonyl Guanidine | C2H4N6O | 54567-24-7 | shock sensitive, explosive |
Barium | Ba | 7440-39-3 | water-reactive; may ignite on contact with water or moist air; acutely toxic |
Barium Chlorate | Ba(ClO3)2H2O | 13477-00-4 | explosive; strong oxidizer; toxic |
Barium Oxide (Anhydrous) | BaO | 1304-28-5 | poison; water-reactive |
Barium Peroxide | BaO2 | 1304-29-6 | poison; water-reactive; oxidizer |
Benzene | C6H6 | 71-43-2 | carcinogenic to humans; flammable |
Benzene Diazonium Chloride | C6H5ClN2 | 100-34-5 | explosive |
Benzotriazole | C6H5N3 | 95-14-7 | explosive |
Benzoyl Peroxide | (C6H5CO)2O2 | 94-36-0 | flammable; explosive; oxidizer; sensitizer; allergen; reacts violently with bases |
Benzyl Alcohol | C6H5CH2OH | 100-51-6 | reacts violently with oxidants; may form explosive peroxides upon concentration |
Bismuth Nitrate | Bi(NO3)3·5H2O | 10035-06-0 | strong oxidizer; contact with other material may cause fire; toxic |
Boranes and Diboranes (e.g., borane, tribromoborane, trifluoroborane, diborane, pentaborane, methyldiborane) | poison; flammable; water-reactive | ||
Bromine Pentafluoride | BrF5 | 7789-30-2 | oxidizer; poison; inhalation hazard; corrosive; reacts with water with explosive force |
Bromine Trifluoride | BrF3 | 7787-71-5 | oxidizer; poison; inhalation hazard; corrosive; reacts with water with explosive force |
Butadiene | C4H6 | 106-99-0 | may for explosive peroxides; carcinogenic to humans |
Butanetriol Trinitrate (BTTN) | C4H7N3O9 | 6659-60-5 | explosive |
Cadmium and Cadmium Compounds (e.g., cadmium hydroxide, cadmium oxide, cadmium sulfide) | carcinogenic to humans; highly toxic | ||
Calcium Nitrate, Anhydrous | Ca(NO3)2 | 10124-37-5 | strong oxidizer; may explode if shocked or heated |
Calcium Permanganate | Ca(MnO4)2 | 10118-76-0 | strong oxidizer |
Carbon Tetrachloride | CCl4 | 56-23-5 | possibly carcinogenic to humans; acutely toxic |
Chloral Hydrate | CCl3CH(OH)2 | 302-17-0 | controlled barbiturate; probably carcinogenic to humans |
Chlorine | Cl2 | 7782-50-5 | oxidizer, corrosive, may be fatal if inhaled |
Chlorine Dioxide | ClO2 | 10049-04-4 | oxidizer; flammable and reactive; shock sensitive; explosive |
Chlorine Trifluoride | ClF3 | 7790-91-2 | powerful oxidizer; explosive reaction with water and acids; poisonous if inhaled |
Chlorine Trioxide | ClO3 | 13932-10-0 | shock sensitive; explosive |
Chloroacetylene | C2HCl | 593-63-5 | shock sensitive; air reactive |
Chloroform | CHCl3 | 67-66-3 | poison; possibly carcinogenic to humans |
Chloropicrin | CCl3NO2 | 76-06-2 | shock sensitive; explosive; poison; inhalation hazard |
Chloroprene | C4H5Cl | 126-99-8 | may form explosive peroxides; possibly carcinogenic to humans |
Chlorotrifluoroethylene | C2F3Cl | 79-38-9 | may form explosive peroxides |
Chromic Chloride (Chromium (III) Chloride) | CrCl3·6H2O | 10060-12-5 | acutely toxic; fatal if inhaled |
Chromium (Powder) | Cr | 7440-47-3 | flammable; toxic |
Chromyl Chloride | CrO2Cl2 | 14977-61-8 | water-reactive; chromium (VI) compounds are carcinogenic to humans |
Cobalt (Powder) | Co | 7440-48-4 | possibly carcinogenic to humans |
Colchicine | C22H25NO6 | 64-86-8 | acutely toxic |
Copper Acetylide | Cu2C2 | 1117-94-8 | explosive |
Cumene (Isopropylbenzene) | C6H5CH(CH3)2 | 98-82-8 | may form explosive peroxides upon concentration; possibly carcinogenic to humans |
Cycloheptanone | C7H12O | 502-42-1 | may form explosive peroxides; flammable; corrosive; toxic |
Cyclohexanol | C6H11OH | 108-93-0 | may form explosive peroxides upon concentration |
Cyclopentene | C5H8 | 142-29-0 | may form explosive peroxides upon concentration |
Diacetylene (Butadiyne) | C4H2 | 460-12-8 | may form explosive peroxides upon concentration; highly flammable; explosive |
Diazidoethane | C2H4N6 | 629-13-0 | explosive |
Diazodinitrophenol (DDNP) | C6H2N4O5 | 4682-03-5 | explosive |
Diazomethane | CH2N2 | 334-88-3 | poisonous and flammable gas |
Dicyclopentadiene | C10H12 | 77-73-6 | may form explosive peroxides upon concentration; acutely toxic; fatal if inhaled; flammable |
Diisopropyl Ether | C6H14O | 108-20-3 | may form explosive peroxides |
Dinitrophenol | C6H3OH(NO2)2 | 51-28-5 | explosive |
Dioxane | C4H802 | 123-91-1 | may form explosive peroxides upon concentration; possibly carcinogenic to humans |
Dipentaerythritol Hexanitrate (DPEHN) | C10H16N6O19 | 13184-80-0 | explosive |
Disulfur Dinitride | S2N2 | 25474-92-4 | explosive |
Divinyl Acetylene | C6H6 | 821-08-9 | may form explosive peroxides; acutely toxic; highly flammable |
Divinyl Ether | C4H6O2 | 109-93-3 | may form explosive peroxides; highly flammable |
Ethyl Ether (diethyl ether) | (C2H5)2O | 60-29-7 | may form explosive peroxides upon concentration |
Ethyl Nitrite | C2H5NO2 | 109-95-5 | explosive |
Ethylene Glycol Dimethyl Ether (Glyme or 1,2-Dimethoxyethane) | C4H10O2 | 28923-39-9 | may form explosive peroxides upon concentration |
Ethylene Glycol Dinitrate (EGDN or 1,2-Dinitroxyethane) | C2H4N2O6 | 628-96-6 | explosive |
Ethylene Oxide | C2H4O | 75-21-8 | carcinogenic to humans; flammable; explosive; may be fatal if inhaled or absorbed through the skin |
Formaldehyde | CH2O | 50-00-0 | carcinogenic to humans; poison; may cause allergic reaction |
Furan | C4H4O | 110-00-9 | possibly carcinogenic to humans; may form explosive peroxides upon concentration |
Glycerol Monolactate Trinitrate (GLTN) | C6H9N3O11 | explosive | |
Grignard Reagents and their solvents Note: a Grignard Reagent has a formula RMgX where X is a halogen and R is an alkyl or aryl (based on a benzene ring) group. An example is CH3CH2MgBr (ethylmagnesium bromide). They are typically found in solution with tetrahydrofuran or ether as the solvent. | Both the Grignard Reagent and the solvents are hazardous. The Grignard Reagents can be highly reactive, corrosive, pyrophoric, and toxic. The solvents are highly flammable and may form explosive peroxides. | ||
Guanyl Nitrosamino Guanylidene Hydrazine | explosive; strong oxidizer | ||
Hexyl Alcohol | CH3(CH2)4CH2OH | 111-27-3 | highly flammable; poison |
HMX | C4H8N8O8 | 2691-41-0 | explosive |
Hydrofluoric Acid | HF | 7664-39-3 | corrosive; may be fatal if inhaled or ingested; liquid and vapor can cause severe burns not always immediately painful or visible, but possibly fatal |
Hydrogen Peroxide (>30%) | H2O2 | 7722-84-1 | fire and explosion risk, severely corrosive; strong oxidizer |
Hydrogen Sulfide | H2S | 7783-06-4 | highly flammable; exposure to very high concentrations causes immediate death; death or permanent injury may occur after very short exposure to small quantities |
Isopropyl Ether (Diisopropyl Ether) | C6H14O | 108-20-3 | highly flammable; may form explosive peroxides |
Lead Dinitroresorcinate (LDNR) | PbC6H2(NO2)2(OH)2 | explosive; probably carcinogenic to humans | |
Lead Dioxide (Lead (IV) Oxide or Lead Brown) | PbO2 | 1309-60-0 | toxic; probably carcinogenic to humans; will accelerate burning in fire; may explode from heat or contamination |
Lead Mononitroresorcinate (LMNR) | PbC6H3NO2(OH)2 | 51317-24-9 | explosive; shock sensitive; probably carcinogenic to humans |
Lead Trinitroresorcinate (Lead Styphnate) | PbC6H(NO2)3(OH)2 | 15245-44-0 | explosive; probably carcinogenic to humans |
Lithium Nitrate | LiNO3 | 7790-69-4 | oxidizer; shock sensitive |
Lithium Nitride | Li3N | 26134-62-3 | highly flammable; powder is easily ignited and burns with intense heat; may ignite spontaneously in moist air |
Lithium Peroxide | Li2O2 | 12031-80-0 | oxidizer; toxic; explosive |
Magnesium (except Mg ribbon & turnings) | Mg | 7439-95-4 | reacts with water to liberate hydrogen gas; flammable solid; easily ignited |
Magnesium Peroxide | MgO2 | 14452-57-4 | strong oxidizer |
Mannitol Hexanitrate | C6H8N6O18 | 15825-70-4 | explosive; strong oxidizer |
Mercury (except in sealed devices) | Hg | 7439-97-6 | corrosive; poison; severely and subtly toxic |
Mercury Compounds (e.g., Nessler's Reagent, mercuric chloride, mercuric potassium iodide, mercuric fluoride) | poison; severely and subtly toxic | ||
Methyl Acetylene | C3H4 | 74-99-7 | highly flammable; may form explosive peroxides upon concentration |
Methyl Cyclopentane | C6H12 | 96-37-7 | highly flammable |
Methyl Isocyanate | CH3NCO | 624-83-9 | water-reactive; highly flammable; polymerizable |
Methyl MethacrylateMonomer | C5H8O2 | 80-62-6 | may form explosive peroxides; flammable; explosive (vapor) |
meta-Trinitrocresol (3-Methyl-2,4,6-trinitrophenol) | C7H5N3O7 | 602-99-3 | explosive; strong oxidizer |
Nessler's Reagent (Mercuric Potassium Iodide and Sodium Hydroxide) | Hg+KI+NaOH | 7783-33-7 | |
Nicotine | C10H14N2 | 54-11-5 | poison; acutely toxic |
Nitroglycerin | C3H5N3O9 | 55-63-0 | explosive; strong oxidizer |
Nitrosoguanidine | C2H5N5O3 | 70-25-7 | explosive; highly flammable; water-reactive; decomposes at elevated temperatures |
Osmic Acid (Osmium Tetroxide) | OsO4 | 20816-12-0 | acutely toxic; may be fatal if inhaled or ingested |
ortho-Toluidine (e.g., Toluidine Blue) | C7H9N | 95-53-4 | carcinogenic to humans; poison |
Pentaerythrite Tetranitrate (PETN) | C5H8N4O12 | 78-11-5 | explosive; strong oxidizer |
Perchloric Acid | HClO4 | 7601-90-3 | strong oxidizing agent; corrosive; contact with organics may result in explosion; can cause serious or permanent injury |
Phenol | C6H6O | 108-95-2 | combustible; corrosive; may be fatal if inhaled, ingested, or absorbed through skin |
Phenyl Thiourea | C7H8N2S | 103-85-5 | extremely toxic; poison; emits toxic fumes when heated |
Phosphorus (yellow or white) | P | 7723-14-0 | flammable solid; self-ignition possible; evolves dangerous gas if burned |
Phosphorus Halides and Oxides (e.g., phosphorus trichloride, phosphorus trioxide, phosphorus, pentabromide) | water-reactive; corrosive; toxic | ||
Phosphides (e.g., magnesium aluminum phosphide, potassium phosphide, sodium phosphide) | poison; water-reactive | ||
Phthalic Anhydride | C8H4O3 | 85-44-9 | explosive; water-reactive |
Picramide | C6H4N4O6 | 489-98-5 | explosive; strong oxidizing agent |
Picrates and Picryl Compounds (e.g.,ammonium picrate, lead picrate, potassium picrate, picryl sulfonic acid, picryl chloride) | explosive | ||
Picric Acid (2,4,6-Trinitrophenol) | C6H3N3O7 | 88-89-1 | extremely reactive; explosive when dry |
para-Nitrophenol (4-Nitrophenol) | NO2C6H4OH | 100-02-7 | poison; forms explosive mixtures |
Polyvinyl Nitrate (PVN or polyethenyl nitrate) | (C2H3NO3)n | explosive; shock sensitive | |
Potassium Amide | KNH2 | 17242-52-3 | may form explosive peroxides |
Potassium Cyanide | KCN | 151-50-8 | acutely toxic |
Potassium Dinitrobenzofuroxan (KDNBF) | KC6H2N4O6 | 29267-75-2 | explosive |
Potassium Nitrite | KNO2 | 7758-09-0 | strong oxidizer |
Potassium Perchlorate | KClO4 | 7778-74-7 | explosive |
Potassium Periodate | KIO4 | 7790-21-8 | strong oxidizer |
Potassium Peroxide | K2O2 | 17014-71-0 | water-reactive; strong oxidizer |
Potassium Superoxide | KO2 | 12030-88-5 | water-reactive; strong oxidizer |
RDX | C3H6N6O6 | 121-82-4 | explosive |
Silanes and Chlorosilanes (e.g., silane; dichlorosilane; tetramethylsilane; trichlorosilane) | flammable; reactive; highly toxic | ||
Silicon Tetrachloride | SiCl4 | 10026-04-7 | air- and water-reactive; corrosive |
Silver Acetylide | Ag2C2 | 13092-75-6 | explosive; shock sensitive |
Silver Cyanide | AgCN | 506-64-9 | acutely toxic; may be fatal if inhaled, ingested, or absorbed through skin |
Silver Dinitroresorcinate (Silver Styphnate) | Ag2C6H(NO3)2(OH)2 | reactive; ignitable; shock sensitive | |
Silver Fulminate | AgCNO | 5610-59-3 | explosive |
Silver Cyanate | AgOCN | 3315-16-0 | toxic |
Silver Nitride | Ag3N | 20737-02-4 | shock sensitive; explosive |
Silver Oxalate | Ag2C2O4 | 533-51-7 | shock sensitive |
Silver Tetrazene | shock sensitive | ||
Sodium Amide | NaNH2 | 7782-92-5 | may form explosive peroxides; water-reactive; highly flammable |
Sodium Chlorate | NaClO3 | 7775-09-9 | oxidizer; explosive |
Sodium Chlorite | NaClO2 | 7758-19-2 | oxidizer; explosive |
Sodium Cyanide | NaCN | 143-33-9 | acutely toxic |
Sodium Dithionite (Sodium Hydrosulfite) | Na2S2O4 | 7775-14-6 | spontaneously combustible; water-reactive; pyrophoric |
Sodium Methylate | NaCH3O | 124-41-4 | spontaneously combustible; water-reactive; pyrophoric |
Sodium Perborate | NaBO3 | 7632-04-4 | air- and water- reactive; explosive |
Sodium Perchlorate | NaClO4 | 7601-89-0 | oxidizer; water-reactive; explosive |
Sodium Permanganate | NaMnO4 | 10101-50-5 | oxidizer; explosive |
Sodium Peroxide | Na2O2 | 1313-60-6 | oxidizer; water-reactive; toxic; explosion and fire risk in combination with powdered metals and organics |
Strontium Perchlorate | SrCl2O8 | 13450-97-0 | shock sensitive |
Styrene Monomer | C8H8 | 100-42-5 | highly flammable; may form explosive peroxides; polymerizable |
Sulfur Trioxide | SO3 | 7446-11-9 | air- and water-reactive; corrosive; poison; inhalation hazard |
Sulfuryl Chloride (Sulfonyl Chloride) | Cl2O2S | 7791-25-5 | air- and water-reactive; corrosive; poison; inhalation hazard |
Sulfuryl Chloride Fluoride | ClFO2S | 13637-84-8 | poison; water-reactive; corrosive |
tert-butyl Hypochlorite | C4H9ClO | 507-40-4 | spontaneously combustible; pyrophoric; fire will produce irritating, corrosive, and/or toxic gases |
Tetrafluoroethylene | C2F4 | 116-14-3 | may form explosive peroxides; highly flammable; probably carcinogenic to humans |
Tetrahydrofuran | C4H8O | 109-99-9 | highly flammable; oxidizes in air to form explosive peroxides |
Tetrahydronaphthalene | C10H12 | 119-64-2 | highly flammable; vapors may form explosive mixtures with air; may form explosive peroxides upon concentration |
Tetranitromethane | CN4O8 | 509-14-8 | oxidizer; poison; possibly carcinogenic to humans; inhalation hazard; explosive |
Tetraselenium Tetranitride | Se4N4 | 12033-88-4 | shock sensitive |
Tetrazene (tetrazolyl guanyltetrazene hydrate) | C2H6N10·H2O | 31330-63-9 | shock sensitive; explosive |
Tetryl (2,4,6-trinitrophenylmethylnitroamine) | C7H5N5O8 | 479-45-8 | oxidizer; explosive |
Thallium Nitride | Tl3N | 12033-67-9 | shock sensitive |
Thermit (example: could be a mixture of aluminum powder, iron oxide, ferro managanese, and ferro vanadium) | flammable solid; dangerous fire risk; once started, reaction is very difficult to stop | ||
Thermite Igniting Mixture (example: could be a mixture of aluminum, barium nitrate, iron oxide and a binder such as dextrin on a copper stick) | becomes a fire hazard if exposed to a flame or high temperatures | ||
Thiocarbonyl Tetrachloride (Perchloromethyl Mercaptan) | CCl4S | 594-42-3 | poison; inhalation hazard |
Thionyl Chloride | SOCl2 | 7719-09-7 | violently water-reactive; lachrymator; highly corrosive; toxic |
Titanium (Powder) | Ti | 7440-32-6 | spontaneously combustible; may ignite on contact with moist air or moisture |
Titanium Tetrachloride | TiCl4 | 7550-45-0 | water-reactive; corrosive; acutely toxic; may be fatal if inhaled |
Triethyl Aluminum | (C2H5)3Al | 97-93-8 | spontaneously combustible; flammable gas is produced on contact with water |
Triisobutyl Aluminum | (C4H9)3Al | 100-99-2 | spontaneously combustible; reacts violently with water producing flammable gas |
Trimethyl Aluminum | (CH3)3Al | 75-24-1 | spontaneously combustible; flammable gas is produced on contact with water |
Trinitroanisole | C7H5N3O7 | 606-35-9 | explosive; strong oxidizer |
Trinitrobenzene | C6H3N3O6 | 99-35-4 | explosive; flammable solid; strong oxidizer |
Trinitrobenzoic Acid | C7H3N3O8 | 129-66-8 or 35860-50-5 | explosive; highly flammable; strong oxidizer |
Trinitronaphthalene (1,3,5-Trinitronaphthalene) | C10H5N3O6 | 2243-94-9 | explosive; strong oxidizer |
Trinitroresorcinol | C6H3N308 | 82-71-3 | explosive; strong oxidizer |
Trinitrotoluene (TNT or 2,4,6-Trinitrotoluene) | C7H5N3O6 | 118-96-7 | explosive; strong oxidizer |
Uranium and Uranium Compounds (e.g., uranium oxide, Uranyl Acetate, Uranyl Nitrate, uranium hexafluoride, uranium tetrafluoride) | toxic by inhalation or ingestion | ||
Urea Nitrate | CH4N2O.HNO3 | 124-47-0 | explosive; strong oxidizer |
Vinyl Acetate | C4H6O2 | 108-05-4 | may form explosive peroxides; possibly carcinogenic to humans; reactive |
Vinyl Acetylene | C4H4 | 689-97-4 | may form explosive peroxides; reactive |
Vinyl Chloride | C2H3Cl | 75-01-4 | carcinogenic to humans; may form explosive peroxides; reactive |
Vinyl Ethers (e.g., divinyl ether; 2-chloroethylvinyl ether; butyl vinyl ether) | may form explosive peroxides upon concentration | ||
Vinylidene Chloride (1,1-Dichloroethene or 1,1-DCE) | C2H2Cl2 | 75-35-4 | may form explosive peroxides |
Zinc Peroxide | ZnO2 | 1314-22-3 | oxidizer; used as an oxidant in explosives; toxic |
* The hazard information provided for the listed chemicals is not intended to address all safety concerns. Before attempting to work with any chemical, review and comply with information provided on the SDS.
6 CCR 1010-6-A