Hydrocarbons (Chemicals)

Term · Environment · MLC-T-ENV-013624

1. Chemical compounds that consist entirely of carbon and hydrogen.

2. An organic compound containing only hydrogen and carbon, often occurring in petroleum, natural gas, and coal.

3. Hydrocarbon group (THC, NMHC, or THCE) on which the emission standards are based for each fuel type as described in § 1033.101.

4. Generally means the hydrocarbon group on which the emission standards are based for each type of fuel and engine.

5. Any organic compound consisting predominantly of carbon and hydrogen.

6. Hydrocarbon group on which the emission standards are based for each fuel type. For alcohol-fueled engines, HC means nonmethane hydrocarbon equivalent (NMHCE). For all other engines, HC means nonmethane hydrocarbon (NMHC).

7. Hydrocarbon group on which the emission standards are based for each fuel type, as described in § 1042.101(d) and § 1042.104(a).

8. Hydrocarbon group on which the emission standards are based for each fuel type. For alcohol-fueled vehicles, HC means nonmethane hydrocarbon equivalent (NMHCE) for exhaust emissions and total hydrocarbon equivalent (THCE) for evaporative emissions. For all other vehicles, HC means nonmethane hydrocarbon (NMHC) for exhaust emissions and total hydrocarbon (THC) for evaporative emissions..

9. THC, THCE, NMHC, or NMHCE, as applicable.

10. Compound consisting of carbon and hydrogen. Hydrocarbons include methane, ethane, propane, cyclopropane, butane, and cyclopentane. Although they are flammable, hydrocarbons (HCs) may offer advantages as substitutes to ozone-depleting substances because they have zero ozone depletion potential, low toxicity, and with the exception of methane, have low global warming potentials.

11. Substances containing only hydrogen and carbon. Fossil fuels are made up of hydrocarbons.

12. Chemical compounds composed only of carbon and hydrogen.

13. A large class of organic compounds containing only carbon and hydrogen, common in petroleum products.

14. Meaning given in 40 CFR 1065.1001.

Table 1. Record
Identifier	MLC-T-ENV-013624
Field	Environment
Abbreviation	HC
References	Terms of Environment; EPA Study of the Potential Impacts of Hydraulic Fracturing on Drinking Water Resources: Progress Report at http://www.epa.gov/hfstudy/pdfs/hf-report20121214.pdf; 40 CFR 1033.901 (CFR 2013); 40 CFR 1065.1001 (CFR 2013); 40 CFR 60.111 (CFR 2013); 40 CFR 1036.801 (CFR 2013); 40 CFR 1042.901 (CFR 2013); 40 CFR 1037.801 (CFR 2013); Ozone Layer Protection Glossary; Glossary of Climate Change Terms; Office of Underground Storage Tanks Technical Terms; Oil Pollution Prevention; 40 CFR 1036.801 (2023)

Record as JSON

{
  "id": "MLC-T-ENV-013624",
  "term": "Hydrocarbons (Chemicals)",
  "field": "Environment",
  "definition": "1. Chemical compounds that consist entirely of carbon and hydrogen.\n\n2. An organic compound containing only hydrogen and carbon, often occurring in petroleum, natural gas, and coal.\n\n3. Hydrocarbon group (THC, NMHC, or THCE) on which the emission standards are based for each fuel type as described in § 1033.101.\n\n4. Generally means the hydrocarbon group on which the emission standards are based for each type of fuel and engine.\n\n5. Any organic compound consisting predominantly of carbon and hydrogen.\n\n6. Hydrocarbon group on which the emission standards are based for each fuel type. For alcohol-fueled engines, HC means nonmethane hydrocarbon equivalent (NMHCE). For all other engines, HC means nonmethane hydrocarbon (NMHC).\n\n7. Hydrocarbon group on which the emission standards are based for each fuel type, as described in § 1042.101(d) and § 1042.104(a).\n\n8. Hydrocarbon group on which the emission standards are based for each fuel type. For alcohol-fueled vehicles, HC means nonmethane hydrocarbon equivalent (NMHCE) for exhaust emissions and total hydrocarbon equivalent (THCE) for evaporative emissions. For all other vehicles, HC means nonmethane hydrocarbon (NMHC) for exhaust emissions and total hydrocarbon (THC) for evaporative emissions..\n\n9. THC, THCE, NMHC, or NMHCE, as applicable.\n\n10. Compound consisting of carbon and hydrogen. Hydrocarbons include methane, ethane, propane, cyclopropane, butane, and cyclopentane. Although they are flammable, hydrocarbons (HCs) may offer advantages as substitutes to ozone-depleting substances because they have zero ozone depletion potential, low toxicity, and with the exception of methane, have low global warming potentials.\n\n11. Substances containing only hydrogen and carbon. Fossil fuels are made up of hydrocarbons.\n\n12. Chemical compounds composed only of carbon and hydrogen.\n\n13. A large class of organic compounds containing only carbon and hydrogen, common in petroleum products.\n\n14. Meaning given in 40 CFR 1065.1001.",
  "abbreviation": "HC",
  "references": [
    "Terms of Environment",
    "EPA Study of the Potential Impacts of Hydraulic Fracturing on Drinking Water Resources: Progress Report at http://www.epa.gov/hfstudy/pdfs/hf-report20121214.pdf",
    "40 CFR 1033.901 (CFR 2013)",
    "40 CFR 1065.1001 (CFR 2013)",
    "40 CFR 60.111 (CFR 2013)",
    "40 CFR 1036.801 (CFR 2013)",
    "40 CFR 1042.901 (CFR 2013)",
    "40 CFR 1037.801 (CFR 2013)",
    "Ozone Layer Protection Glossary",
    "Glossary of Climate Change Terms",
    "Office of Underground Storage Tanks Technical Terms",
    "Oil Pollution Prevention",
    "40 CFR 1036.801 (2023)"
  ],
  "url": "https://mlchart.com/terminology/environment/hydrocarbons-chemicals/"
}

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