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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 80421Generated: October 26, 2026

2-Pentyn-1-ol

pent-2-yn-1-ol · CCC#CCO · 2-pentyn-1-0l · 2-PENTYN-2-OL · 1-pentyn-1-ol · 2-PENTYN-1-OL · 2-PENTYNE-1-OL · 2-Pentyn-1-ol>2-Pentyn-1-ol 98%

https://huagongshe.com/en/chemical/80421

2-Pentyn-1-ol molecular structure

Identifiers & Physical Properties

CAS No.6261-22-9
Molecular formulaC5H8O
Average molar mass84.12 g/mol
Monoisotopic mass84.05751488 g/mol
SMILESCCC#CCO
InChIKeyWLPYSOCRPHTIDZ-UHFFFAOYSA-N
PubChem CID80421
EC No.228-411-2
DTXSIDDTXSID0064177

Chemical & Physical Properties

XLogP0.6
Topological polar surface area20.2
Hydrogen bond donors1
Hydrogen bond acceptors1
Rotatable bonds0
Heavy atoms6
Formal charge0
Complexity72.4
SpringerMaterials PropertiesDensity
Melting point-49.7°C
Boiling point84-85 °C/57 mmHg (lit.)
Density0.909 g/mL at 25 °C (lit.)
Refractive indexn20/D 1.452(lit.)
Flash point137 °F
Storage conditions2-8°C
SolubilityChloroform (Slightly), Methanol (Slightly)
Physical stateclear liquid
pKa (acidity coefficient)13.04±0.10(Predicted)
ColorColorless to Light yellow to Light orange
BRN1734007
InChI1S/C5H8O/c1-2-3-4-5-6/h6H,2,5H2,1H3
InChIKeyWLPYSOCRPHTIDZ-UHFFFAOYSA-N
SMILESCCC#CCO
CAS DataBase Reference6261-22-9(CAS DataBase Reference)
FDA UNIIA2E2Y3AQD6
EPA Substance Registry System2-Pentyn-1-ol (6261-22-9)
UNSPSC Code12352100
NACRESNA.22
GHS pictogramGHS02,GHS07
Signal wordWarning
GHS hazard statementsH226-H315-H319-H335
GHS precautionary statementsP210-P302+P352-P305+P351+P338
Target organsRespiratory system
Personal protective equipment (PPE)Eyeshields, Gloves, type ABEK (EN14387) respirator filter
Hazard symbolsXi
Risk statements (R)36/37/38
Safety statements (S)26-36/37/39-37/39
UN transport numberUN 1987 3/PG 3
Water hazard class (WGK)3
F10
TSCA inventory statusTSCA listed
Hazard class3Eye Irrit. 2Flam. Liq. 3Skin Irrit. 2STOT SE 3
Packing groupIII
Customs code2905190098
Storage class3 - Flammable liquids
Limited quantities5.0 L (1.3 gallons) (liquid)
Excepted quantitiesMax Inner Pack (30g or 30ml) and Max Outer Pack (1Kg or 1L)

Safety & Regulations

GHS classificationWarningH226 (97.8%): Flammable liquid and vapor [Warning Flammable liquids]P210, P233, P240, P241, P242, P243, P261, P264, P264+P265, P271, P280, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P319, P321, 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 6 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Regulatory informationChemical: 2-Pentyn-1-ol
Hazard Classes and CategoriesFlam. Liq. 3 (97.8%)
F10
Personal protective equipment (PPE)Eyeshields, Gloves, type ABEK (EN14387) respirator filter
Water hazard class (WGK)3
TSCA inventory statusTSCA listed
UN transport numberUN 1987 3/PG 3
Customs code2905190098
Risk statements (R)36/37/38
Signal wordWarning
GHS pictogramGHS02,GHS07
Hazard symbolsXi
Safety statements (S)26-36/37/39-37/39
Hazard class3Eye Irrit. 2Flam. Liq. 3Skin Irrit. 2STOT SE 3
Storage class3 - Flammable liquids
Packing groupIII
Target organsRespiratory system
GHS hazard statementsH226-H315-H319-H335
Limited quantities5.0 L (1.3 gallons) (liquid)
Excepted quantitiesMax Inner Pack (30g or 30ml) and Max Outer Pack (1Kg or 1L)
GHS precautionary statementsP210-P302+P352-P305+P351+P338

Applications & Uses

Uses

2-Pentyn-1-ol was employed as starting reagent for the synthesis of (-)-muricatacin. It was also used in the preparation of (2Z)-3-tributylstannyl-2-penten-1-ol.