Derivative Type: a-Form
Additional Names: 5-Methyl-2(3H)-furanone; D2-angelica lactone; g-methyl-b,g-crotonolactone; 4-hydroxy-3-pentenoic acid g-lactone
Properties: Volatile needles, mp 18°. d420 1.084. bp12 56°. nHe20 1.4476. One gram dissolves in 20 ml water at 15°. Heating with triethylamine soln converts it to the b-form. LD50 orally in mice: 2800 mg/kg (Moran).
Melting point: mp 18°
Boiling point: bp12 56°
Index of refraction: nHe20 1.4476
Density: d420 1.084
Toxicity data: LD50 orally in mice: 2800 mg/kg (Moran)
Derivative Type: b-Form
Additional Names: 5-Methyl-2(5H)-furanone; D1-angelica lactone; g-methyl-a,b-crotonolactone; 4-hydroxy-2-pentenoic acid g-lactone
Properties: Liquid. Not solidified at -17°. d420 1.076. bp751 208-209°. bp10 87°. nHe20 1.4603. Sol in water. Forms a dimer. More stable than a-form.
Boiling point: bp751 208-209°; bp10 87°
Index of refraction: nHe20 1.4603
Density: d420 1.076
Derivative Type: a¢-Form
Additional Names: Dihydro-5-methylene-2(3H)-furanone; g-methylene-g-butyrolactone
Properties: bp17 80°.
Boiling point: bp17 80°
产品链接: 1333-38-6››