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CAS 1 record

CAS 127-91-3

CAS 127-91-3 matches 1 EU annex record across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 127-91-3
CAS 127-91-3PubChem CID 14896

Beta-Pinene

Beta-pinene is an isomer of pinene with an exocyclic double bond. It is a component of essential oils from many plants. It has a role as a plant metabolite. — ChEBI

IUPAC name
6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane
Molecular formula
C10H16
Molecular weight
136.23 g/mol
Exact mass
136.125200510 Da
XLogP3
3.1
Topological polar surface area
0.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
0
Covalent units
1
Defined stereocentres
0

Also known as

Nopinene2(10)-PineneTerbentheneTerebenthene6,6-Dimethyl-2-methylenebicyclo[3.1.1]heptanePin-2(10)-enePseudopinenNopinen
16 more reported names
PINENE, BETARosemarelBicyclo[3.1.1]heptane, 6,6-dimethyl-2-methylene-CHEBI:500256,6-Dimethyl-2-methylenebicyclo(3.1.1)heptaneBicyclo(3.1.1)heptane, 6,6-dimethyl-2-methylene-6,6-Dimethyl-2-methylene-bicyclo(3.1.1)heptane6,6-dimethyl-2-methylidenebicyclo(3.1.1)heptaneRefChem:56036,6-dimethyl-4-methylidenebicyclo(3.1.1)heptane204-872-5245-424-94MS8VHZ1HJFEMA No. 2903Pseudopinene.beta.-Pinene
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Evidence from additional scientific databases

NIH PubChem PUG-View
Exact identifier match14896

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

  • Note: This chemical does not meet GHS hazard criteria for 0.1% (3 of 2276) of reports. Source: European Chemicals Agency (ECHA)
  • Signal: Danger Source: European Chemicals Agency (ECHA)
  • GHS Hazard Statements: H226 (99.7%): Flammable liquid and vapor [Warning Flammable liquids]; H304 (99.7%): May be fatal if swallowed and enters airways [Danger Aspiration hazard]; H315 (81.9%): Causes skin irritation [Warning Skin corrosion/irritation]; H317 (97.5%): May cause an allergic skin reaction [Warning Sensitization, Skin]; H400 (26.1%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]; H410 (30.2%): 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, P261, P264, P272, P273, P280, P301+P316, P302+P352, P303+P361+P353, P321, P331, P332+P317, P333+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 2276 reports by companies from 38 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.; Reported as not meeting GHS hazard criteria per 3 of 2276 reports by companies.; There are 37 notifications provided by 2273 of 2276 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: H226: Flammable liquid and vapor [Warning Flammable liquids]; H304: May be fatal if swallowed and enters airways [Danger Aspiration hazard]; H315: Causes skin irritation [Warning Skin corrosion/irritation]; H317: May cause an allergic skin reaction [Warning Sensitization, Skin]; H331: Toxic if inhaled [Danger Acute toxicity, inhalation]; H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation] Source: NITE-CMC
  • Precautionary Statement Codes: P210, P233, P240, P241, P242, P243, P261, P264, P271, P272, P280, P301+P316, P302+P352, P303+P361+P353, P304+P340, P316, P319, P321, P331, P332+P317, P333+P317, P362+P364, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement) Source: NITE-CMC
  • Signal: Danger Source: Hazardous Chemical Information System (HCIS), Safe Work Australia
  • GHS Hazard Statements: H304: May be fatal if swallowed and enters airways [Danger Aspiration hazard]; H315: Causes skin irritation [Warning Skin corrosion/irritation]; H317: May cause an allergic skin reaction [Warning Sensitization, Skin] Source: Hazardous Chemical Information System (HCIS), Safe Work Australia
  • Precautionary Statement Codes: P261, P264, P272, P280, P301+P316, P302+P352, P321, P331, P332+P317, P333+P317, P362+P364, P405, and P501 (click each P-code to see the statement) Source: Hazardous Chemical Information System (HCIS), Safe Work Australia
  • Environmental Bioconcentration: An estimated BCF of 320 was calculated in fish for beta-pinene(SRC), using a log Kow of 4.16(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(SRC), provided the compound is not metabolized by the organism(SRC). Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Fate: TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 4,400(SRC), determined from a log Kow of 4.16(2) and a regression-derived equation(3), indicates that beta-pinene is expected to have slight mobility in soil(SRC). Volatilization of beta-pinene from moist soil surfaces is expected to be an important fate process(SRC) given an estimated Henry's Law constant of 0.16 atm-cu m/mole(SRC), using a fragment constant estimation method(4). However, adsorption to soil is expected to attenuate volatilization(SRC). beta-Pinene is expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 2.93 mm Hg(5). Biodegradation data were not available(SRC, 2008). However, by analogy to alpha-pinene which reached 95% of its theoretical BOD using activated sludge in the Japanese MITI test(6), biodegradation may be an important environmental fate process for beta-pinene in soil(SRC). Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Fate: AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 4,400(SRC), determined from a log Kow of 4.16(2) and a regression-derived equation(3), indicates that beta-pinene is expected to adsorb to suspended solids and sediment(SRC). Volatilization from water surfaces is expected(3) based upon an estimated Henry's Law constant of 0.16 atm-cu m/mole(SRC), developed using a fragment constant estimation method(4). Using this Henry's Law constant and an estimation method(3), volatilization half-lives for a model river and model lake are 3 hours and 5 days, respectively(SRC). However, volatilization from water surfaces is expected to be attenuated by adsorption to suspended solids and sediment in the water column. The estimated volatilization half-life from a model pond is 340 days if adsorption is considered(5). According to a classification scheme(6), an estimated BCF of 320(SRC), from its log Kow(2) and a regression-derived equation(7), suggests the potential for bioconcentration in aquatic organisms is high, provided the compound is not metabolized by the organism(SRC). beta-Pinene is not expected to undergo hydrolysis in the environment due to the lack of function 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), beta-pinene, which has a vapor pressure of 2.93 mm Hg at 25 °C(2), is expected to exist solely as a vapor in the ambient atmosphere. Vapor-phase beta-pinene 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 4.9 hours(SRC), calculated from its rate constant of 7.89X10-11 cu cm/molecule-sec at 25 °C(3). The rate constant for the vapor-phase reaction of beta-pinene with ozone has been estimated as 1.2X10-17 cu cm/molecule-sec at 25 °C(SRC) that was derived using a structure estimation method(3). This corresponds to an atmospheric half-life of about 23 hours at an atmospheric concentration of 7X10+11 ozone molecules per cu cm(4). beta-Pinene does not contain chromophores that absorb at wavelengths >290 nm(5) and therefore is not expected to be susceptible to direct photolysis by sunlight(SRC). 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 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 127-91-3

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How CAS 127-91-3 is used on this site

CAS 127-91-3 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 1 EU annex record shares 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 127-91-3 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.