Product Name

  • Name

    3-Methyl-2-penten-4-yn-1-ol

  • EINECS
  • CAS No. 105-29-3
  • Article Data35
  • CAS DataBase
  • Density 0.94g/cm3
  • Solubility
  • Melting Point 25°C
  • Formula C6H8 O
  • Boiling Point 170.9°Cat760mmHg
  • Molecular Weight 96.1289
  • Flash Point 65.6°C
  • Transport Information
  • Appearance
  • Safety Decomposes violently when heated above 155°C. May polymerize exothermically when heated above 100°C. Polymerization is catalyzed by traces of acid or base. Reaction with sodium hydroxide forms an explosive salt. The cis- isomer readily cyclizes to form the dangerous 2,3-dimethylfuran. When heated to decomposition it emits acrid smoke and irritating fumes. See also ACETYLENE COMPOUNDS and ALKYNES.
  • Risk Codes
  • Molecular Structure Molecular Structure of 105-29-3 (3-Methyl-2-penten-4-yn-1-ol)
  • Hazard Symbols
  • Synonyms 1-Hydroxy-3-methyl-2-penten-4-yne;1-Pentol; 3-Methyl-2-penten-4-yn-1-ol; 3-Methyl-2-penten-4-ynol;5-Hydroxy-3-methylpent-3-en-1-yne
  • PSA 20.23000
  • LogP 0.55820

3-Methylpent-2-en-4-yn-1-ol Chemical Properties

IUPAC Name: (Z)-3-methylpent-2-en-4-yn-1-ol
Synonyms of 3-Methylpent-2-en-4-yn-1-ol (CAS NO.105-29-3): 1-Pentol ;  EINECS 203-284-6 ; 2-Penten-4-yn-1-ol, 3-methyl- ; 1-Pentol [UN2705] [Corrosive] ; UN2705
CAS NO: 105-29-3
Molecular Formula of 3-Methylpent-2-en-4-yn-1-ol (CAS NO.105-29-3): C6H8O
Molecular Weight: 96.1271
Molecular Structure:

H bond acceptors: 1
H bond donors: 1
Freely Rotating Bonds: 2
Polar Surface Area: 9.23 Å2
Index of Refraction: 1.481
Molar Refractivity: 29.1 cm3
Molar Volume: 102.2 cm3
Surface Tension: 35.7 dyne/cm
Density of 3-Methylpent-2-en-4-yn-1-ol (CAS NO.105-29-3): 0.94 g/cm3
Flash Point: 65.6 °C
Enthalpy of Vaporization: 47.42 kJ/mol
Boiling Point: 170.9 °C at 760 mmHg
Vapour Pressure: 0.46 mmHg at 25°C

3-Methylpent-2-en-4-yn-1-ol Uses

 3-Methylpent-2-en-4-yn-1-ol (CAS NO.105-29-3) is used as intermediate of vitamin a acetate.

3-Methylpent-2-en-4-yn-1-ol Safety Profile

RIDADR: 2705
HazardClass: 8
PackingGroup: II
Decomposes violently when heated above 155°C. May polymerize exothermically when heated above 100°C. Polymerization is catalyzed by traces of acid or base. Reaction with sodium hydroxide forms an explosive salt. The cis- isomer readily cyclizes to form the dangerous 2,3-dimethylfuran. When heated to decomposition it emits acrid smoke and irritating fumes. See also ACETYLENE COMPOUNDS and ALKYNES.

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