CAS 109-68-2 Pent-2-ene (HCID 12585)

Names & identifiers

Preferred name: Pent-2-ene
IUPAC: pent-2-ene
English name: trans-2-Pentene
Molecular formula: C5H10
Molecular weight: 70.13

Names & synonyms

pent-2-ene109-68-22-Pentene,c&ts-MethylethylethyleneCH3CH=CHC2H5MethylethylethyleneRefChem:171272QMMOXUPEWRXHJS-HWKANZROSA-NQMMOXUPEWRXHJS-UHFFFAOYSA-N2-PENTENE3-Pentene.beta.-n-Amylene

Show more names

(E)-pent-2-eneAMYLENENsc 7894B-N-AMYLENE2-N-PENTENE

sym-Methylethylethylenemethyl-2-buteness-n-Amylene2-AmyleneSCHEMBL7896SCHEMBL8145SCHEMBL19252SCHEMBL20189

Database identifiers

CAS: 109-68-2
PubChem CID: 12585
DTXSID: DTXSID5059375
EC Number: 203-695-0

Properties

Computed structural properties

XLogP: 2.1
Topological polar surface area: 0 Å²
Hydrogen bond donors: 0
Hydrogen bond acceptors: 0
Rotatable bonds: 1
Heavy atoms: 5
Formal charge: 0
Complexity: 27

Experimental & physicochemical properties

Kovats Retention Index · 3 items

503；522

505

522；558

Physicochemical properties

Melting point: -142.6 °C · -142.6°C
Boiling point: 37 °C · 37 °C(lit.)
Density: 0.651 g/mL · 0.651 g/mL at 20 °C(lit.)
vapor pressure: 8.06 psi · 8.06 psi ( 20 °C)
refractive index: 20 · n20/D 1.381
Flash point: 50 °F · −50 °F
storage temp.: 2 · 2-8°C
form: clear liquid
color: Colorless to Almost colorless
Water Solubility: Not miscible or difficult to mix in water.
Merck: 14 · 14,7123
BRN: 969151 · 969151
Henry's Law Constant: 4.1 · 4.1×10-5 mol/(m3Pa) at 25℃, Plyasunov and Shock (2000)
Stability: Stable. Extremely flammable - note low boiling point and low flash point. Incompatible with strong oxidizing agents.
InChI: 1S/C5H10/c1-3-5-4-2/h3,5H,4H2,1-2H3/b5-3+
InChIKey: QMMOXUPEWRXHJS-HWKANZROSA-N
SMILES: CCC=CC
CAS DataBase Reference: 109 · 109-68-2(CAS DataBase Reference)
FDA UNII: 5 RK21VDPE · Y5RK21VDPE
EPA Substance Registry System: 2 · 2-Pentene (109-68-2)
UNSPSC Code: 12352100 · 12352100
NACRES: 22 · NA.22
Symbol(GHS): 2 · GHS02,GHS07,GHS08
Signal word: Danger
Hazard statements: 315 · H315-H319-H304-H412-H225
Precautionary statements: 501 · P501-P273-P240-P210-P233-P243-P241-P242-P264-P280-P370+P378-P331-P337+P313-P305+P351+P338-P362+P364-P303+P361+P353-P332+P313-P301+P310-P403+P235-P405
PPE: Eyeshields, Faceshields, Gloves
Hazard Codes: F,Xn
Risk Statements: 11 · 11-36/37/38-65
Safety Statements: 9 · 9-16-26-29-33-36-62
RIDADR: 3295 · UN 3295 3/PG 2
WGK Germany: 3 · 3
TSCA: TSCA listed
HazardClass: 3 · 3
PackingGroup: II
HS Code: 2901290000 · 2901290000
Storage Class: 3 · 3 - Flammable liquids
Hazard Classifications: 1 Flam · Asp. Tox. 1Flam. Liq. 2

Safety & regulation

GHS classification

GHS Classification · 5 items

Danger

H225 (100%): Highly Flammable liquid and vapor [Danger Flammable liquids]；H304 (100%): May be fatal if swallowed and enters airways [Danger Aspiration hazard]；H315 (89.1%): Causes skin irritation [Warning Skin corrosion/irritation]；H319 (89.1%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]；H335 (82.6%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]

P210, P233, P240, P241, P242, P243, P261, P264, P264+P265, P271, P280, P301+P316, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P319, P321, P331, P332+P317, P337+P317, P362+P364, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 46 reports by companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.；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.

Hazard information

Regulatory Information · 2 items

Chemical: 2-Pentene

2-Pentene: Does not have an individual approval but may be used under an appropriate group standard

Hazard Classes and CategoriesFlam. Liq. 2 (100%)；Asp. Tox. 1 (100%)；Skin Irrit. 2 (89.1%)；Eye Irrit. 2 (89.1%)；STOT SE 3 (82.6%)

Toxicology

TreatmentTreatment is mainly symptomatic and supportive. Gastric lavage, emesis, and the administration of activated charcoal should be avoided, as vomiting increases the risk of aspiration. (A600)

Health EffectsPetroleum distillates are aspiration hazards and may cause pulmonary damage, central nervous system depression, and cardiac effects such as cardiac arrhythmias. They may also affect the blood, immune system, liver, and kidney. (A600, L1297)

Exposure RoutesOral (L400) ; inhalation (L400) ; dermal (L400)

Toxicity SummaryPetroleum distillates are central nervous system depressants and cause pulmonary damage. (A600)

Signs and Symptoms · 1 item

Petroleum distillate poisoning may cause nausea, vomiting, cough, pulmonary irritation progressing to pulmonary edema, bloody sputum, and bronchial pneumonia. At high amounts, central nervous system depression may also occur, with symptoms such as weakness, dizziness, slow and shallow respiration, unconsciousness, and convulsions. Petroleum distillates are also irritating to the skin. (A594)

Carcinogen ClassificationNo indication of carcinogenicity to humans (not listed by IARC).

Regulatory information

Regulatory Information · 2 items

Chemical: 2-Pentene

2-Pentene: Does not have an individual approval but may be used under an appropriate group standard

Safety data

PPE: Eyeshields, Faceshields, Gloves
wgk: 3
tsca: TSCA listed
ridadr: UN 3295 3/PG 2
hs_code: 2901290000
risk_code: 11-36/37/38-65
Signal word: Danger
Symbol(GHS): GHS02,GHS07,GHS08
hazard_code: F,Xn
safety_code: 9-16-26-29-33-36-62
hazard_class: 3
Storage Class: 3 - Flammable liquids
packing_group: II
Hazard statements: H315-H319-H304-H412-H225
Hazard Classifications: Asp. Tox. 1Flam. Liq. 2
Precautionary statements: P501-P273-P240-P210-P233-P243-P241-P242-P264-P280-P370+P378-P331-P337+P313-P305+P351+P338-P362+P364-P303+P361+P353-P332+P313-P301+P310-P403+P235-P405

Chemistry & industry

Pharmacology

Metabolism/MetabolitesVolatile hydrocarbons are absorbed mainly through the lungs, and may also enter the body after ingestion via aspiration. (A600)

Uses & manufacturing

UsesPentenes are components of gasoline and are often produced as by-products of catalytic of thermal cracking of petroleum. (L1287)

General Manufacturing Information2-Pentene: ACTIVE

Applications

Uses2-Pentene (mixture of cis and trans) is used in the synthesis of polycyclopentene by ring-opening metathesis polymerization.

General Description2-Pentene undergoes addition reaction with phenoxathiin cation radical in acetonitrile solution to form bis(10-phenoxathiiniumyl)alkane adducts.