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CAS 111-66-0

CAS 111-66-0 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 111-66-0
CAS 111-66-0PubChem CID 8125

1-Octene

1-octene is an octene with an unsaturation C-1. — ChEBI

IUPAC name
oct-1-ene
Molecular formula
C8H16
Molecular weight
112.21 g/mol
Exact mass
112.125200510 Da
XLogP3
4.6
Topological polar surface area
0.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
0
Covalent units
1
Defined stereocentres
0

Also known as

Caprylene1-Octylenen-1-Octene1-CapryleneOctylenealpha-Octenealpha-OctyleneE5VK21B9RC
16 more reported names
NSC-8457CHEBI:46708RefChem:435206203-893-7OCTENE-1Octene.alpha.-Octene.alpha.-OctyleneNSC 8457Neodene 81-?Octene1-C8H161-Octene, 98%1-Octene, analytical standard1-n-octeneOctene, 1-
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Evidence from additional scientific databases

NIH PubChem PUG-View
Exact identifier match8125

Attributed physical-property, hazard, environmental and use annotations.

  • First Aid: INHALATION: remove from exposure; support respiration.; INGESTION: do NOT induce vomiting. (USCG, 1999) Source: CAMEO Chemicals
  • Note: This chemical does not meet GHS hazard criteria for 5.1% (102 of 2014) of reports. Source: European Chemicals Agency (ECHA)
  • Signal: Danger Source: European Chemicals Agency (ECHA)
  • GHS Hazard Statements: H225 (94.9%): Highly Flammable liquid and vapor [Danger Flammable liquids]; H304 (94.8%): May be fatal if swallowed and enters airways [Danger Aspiration hazard]; H315 (17.7%): Causes skin irritation [Warning Skin corrosion/irritation]; H411 (17.7%): Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard] Source: European Chemicals Agency (ECHA)
  • Precautionary Statement Codes: P210, P233, P240, P241, P242, P243, P264, P273, P280, P301+P316, P302+P352, P303+P361+P353, P321, P331, P332+P317, P362+P364, P370+P378, P391, P403+P235, P405, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
  • ECHA C&L Notifications Summary: Aggregated GHS information provided per 2014 reports by companies from 23 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.; Reported as not meeting GHS hazard criteria per 102 of 2014 reports by companies.; There are 22 notifications provided by 1912 of 2014 reports by companies with hazard statement code(s).; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
  • Note: This chemical does not meet GHS hazard criteria for 3.5% (4 of 113) of reports. Source: European Chemicals Agency (ECHA)
  • GHS Hazard Statements: H225 (96.5%): Highly Flammable liquid and vapor [Danger Flammable liquids]; H304 (96.5%): May be fatal if swallowed and enters airways [Danger Aspiration hazard]; H400 (94.7%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]; H410 (94.7%): Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard] Source: European Chemicals Agency (ECHA)
  • Precautionary Statement Codes: P210, P233, P240, P241, P242, P243, P273, P280, P301+P316, P303+P361+P353, P331, P370+P378, P391, P403+P235, P405, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
  • ECHA C&L Notifications Summary: Aggregated GHS information provided per 113 reports by companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.; Reported as not meeting GHS hazard criteria per 4 of 113 reports by companies.; There are 3 notifications provided by 109 of 113 reports by companies with hazard statement code(s).; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
  • Signal: Danger Source: NITE-CMC
  • GHS Hazard Statements: H225: Highly Flammable liquid and vapor [Danger Flammable liquids]; H304: May be fatal if swallowed and enters airways [Danger Aspiration hazard]; H315: Causes skin irritation [Warning Skin corrosion/irritation]; H332: Harmful if inhaled [Warning Acute toxicity, inhalation]; H336: May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects] Source: NITE-CMC
  • Precautionary Statement Codes: P210, P233, P240, P241, P242, P243, P261, P264, P271, P280, P301+P316, P302+P352, P303+P361+P353, P304+P340, P317, P319, P321, P331, P332+P317, P362+P364, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement) Source: NITE-CMC
  • NFPA Health Rating: 1 - Materials that, under emergency conditions, can cause significant irritation. Source: Hazardous Substances Data Bank (HSDB)
  • NFPA Fire Rating: 3 - Liquids and solids that can be ignited under almost all ambient temperature conditions. Materials produce hazardous atmospheres with air under almost all ambient temperatures or, though unaffected by ambient temperatures, are readily ignited under almost all conditions. Source: Hazardous Substances Data Bank (HSDB)
  • NFPA Instability Rating: 0 - Materials that in themselves are normally stable, even under fire conditions. Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Bioconcentration: An estimated BCF of 660 was calculated for 1-octene(SRC), using a log Kow of 4.57(1) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is high. Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Fate: TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 507(SRC), determined from a structure estimation method(2), indicates that 1-octene should have low to moderate mobility in soil(SRC). Volatilization of 1-octene from moist soil surfaces is expected to be an important fate process(SRC) given an estimated Henry's Law constant of 0.627 atm-cu m/mole(SRC) from its vapor pressure, 17.4 mm Hg(3), and water solubility, 4.1 mg/l(4). The potential for volatilization of 1-octene from dry soil surfaces may exist(SRC) based upon a vapor pressure of 17.4 mm Hg(3). However, adsorption to soil is expected to attenuate volatilization(SRC). Based on pure culture studies, 1-octene has the potential to biodegrade under aerobic conditions in soil(5,6). Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Fate: AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 510(SRC), determined from an estimation method(2), indicates that 1-octene should adsorb to suspended solids and sediment in water(SRC). Volatilization from water surfaces is expected(3) based upon an estimated Henry's Law constant of 0.627 atm-cu m/mole(SRC) from its vapor pressure, 17.4 mm Hg(4), and water solubility, 4.1 mg/l(5). Using this Henry's Law constant and an estimation method(3), volatilization half-lives for a model river and model lake are 3.1 hours and 4.2 days, respectively(SRC). The volatilization half-life from a model pond 2 m deep is estimated to be 37 hrs ignoring adsorption; when considering maximum adsorption, the volatilization half-life increases to 95 hrs(6). According to a classification scheme(7), a BCF of 660(SRC) estimated from its log Kow of 4.57(8) and a regression-derived equation(9), suggests the potential for bioconcentration in aquatic organisms is high. Based on pure culture studies, 1-octene has the potential to biodegrade under aerobic conditions in water(10,11). Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Fate: ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), 1-octene, which has a vapor pressure of 17.4 mm Hg at 25 °C(2), is expected to exist solely as a vapor in the ambient atmosphere. Vapor-phase 1-octene is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals(SRC); the half-life for this reaction in air is estimated to be 3.9 hrs(SRC), calculated from its rate constant of 3.X10-11 cu cm/molecule-sec at 25 °C(3) determined using a structure estimation method(3). Vapor-phase 1-octene is also degraded in the atmosphere by reaction with ozone molecules(SRC); the half-life for this reaction in air is estimated to be 23 hrs(SRC), calculated from its rate constant of 1.2X10-17 cu cm/molecule-sec at 25 °C(3) determined using a structure estimation method(3). Source: Hazardous Substances Data Bank (HSDB)
  • Sources/Uses: Used as a plasticizer, in surfactants, and as a co-monomer in the production of polyethylene; [HSDB] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
  • Sources/Uses: Present in gasoline and emitted in exhausts of automobiles, turbines, and breweries; Detected in food, e.g., hot cooking oils; Octene includes the following isomers: 1-Octene, 2-Octene (E), 2-Octene (Z), 3-Octene (E), 3-Octene (Z), 4-Octene (E), 4-Octene (Z); Used to make polymers, surfactants, and detergents; 1-Octene used as a chemical intermediate, plasticizer, surfactant, and comonomer to produce polyethylene; [HSDB] Di-n-butene (25377-83-7) is a mixture of octenes with boiling points in the range of 116-126 deg C; [Ullmann]. Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
  • Uses: Organic synthesis, plasticizer, surfactants Source: Hazardous Substances Data Bank (HSDB)
  • Uses: As a comonomer in the production of high density polyethylene and linear low density polyethylene. The addition of 1-octene is used to modify the density and other properties of the polymer. Source: Hazardous Substances Data Bank (HSDB)
  • Uses: Used in the polymer, surfactant and detergent industries Source: Hazardous Substances Data Bank (HSDB)

Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record

Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.

Additional source coverage and match status
SourceResultChecked
NIH PubChem PUG-ViewExact match2026-08-31

A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 111-66-0

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How CAS 111-66-0 is used on this site

CAS 111-66-0 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 111-66-0 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.