delta-Valerolactone

Description Uses Preparation

Product Name: delta-Valerolactone
CAS No.: 542-28-9
Chemical Name: delta-Valerolactone
Synonyms: TETRAHYDRO-2H-PYRAN-2-ONE;δ-Valerolactone;tetrahydro-pyran-2-one;Oxan-2-one;D-VALEROLACTONE;5-Valerolactone;4-PENTANOLIDE;G-VALEROLACTONE;Tetrahydro-2-pyranone;TETRAHYDRO-2H-2-PYRANONE
CBNumber: CB9853788
Molecular Formula: C5H8O2
Formula Weight: 100.12
MOL File: 542-28-9.mol

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delta-Valerolactone Property

Melting point:: -13 °C
Boiling point:: 230 °C
Density: 1.105 g/mL at 20 °C
vapor density: 3.45 (vs air)
vapor pressure: 8.8Pa at 20℃
refractive index: n20/D 1.457(lit.)
Flash point:: 212 °F
storage temp.: -20°C
solubility: Chloroform, Ethyl Acetate, Methanol
form: Liquid
color: Clear colorless to pale yellow
Water Solubility: miscible
BRN: 106436
Stability:: Moisture Sensitive
LogP: 0 at 23℃
CAS DataBase Reference: 542-28-9(CAS DataBase Reference)
NIST Chemistry Reference: 2H-Pyran-2-one, tetrahydro-(542-28-9)
EPA Substance Registry System: 2H-Pyran-2-one, tetrahydro- (542-28-9)

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Safety

Hazard Codes: Xi
Risk Statements: 41
Safety Statements: 26-39
WGK Germany: 3
RTECS: LU3580000
Hazard Note: Irritant/Keep Cold
TSCA: Yes
HS Code: 29322090

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word: Danger
Hazard statements: H318Causes serious eye damage
Precautionary statements: P280Wear protective gloves/protective clothing/eye protection/face protection.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 389579
Product name: δ-Valerolactone
Purity: technical grade
Packaging: 25ml
Price: $57.3
Updated: 2024/03/01

Sigma-Aldrich

Product number: 389579
Product name: δ-Valerolactone
Purity: technical grade
Packaging: 100ml
Price: $164
Updated: 2024/03/01

TCI Chemical

Product number: V0039
Product name: δ-Valerolactone
Purity: >98.0%(GC)
Packaging: 25g
Price: $38
Updated: 2024/03/01

TCI Chemical

Product number: V0039
Product name: δ-Valerolactone
Purity: >98.0%(GC)
Packaging: 100g
Price: $90
Updated: 2024/03/01

Alfa Aesar

Product number: L04794
Product name: delta-Valerolactone, 98%, may contain polymer
Packaging: 25g
Price: $50.8
Updated: 2024/03/01

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delta-Valerolactone Chemical Properties,Usage,Production

Description

δ-valerolactone, also known as 1,5-valerolactone, delta-valerolactone, tetrahydro-2H-2-pyrone, tetrahydro-o-pyrone, tetrahydrocoumarin; the English name is Delta -Valerolactone, the abbreviated name is generally δ -VL or DVL, and the molecular formula is C5H802.

Uses

Due to its good application flexibility, lower biological toxicity, more derivative compounds, easy polymerization and greatly increase the viscosity of coatings and other characteristics, delta-valerolactone is widely used in polyesters, polyurethanes, special solvents, and coatings.

Preparation

In the first step, the 1,5-pentanediol raw material is fed into the drying tower for dehydration, to ensure that the water content is less than 1wt%, under optimized conditions, less than 0.5wt%, further optimization, less than 0.1wt%, further optimization situation , Less than 0.05wt%, that is, 500wppm; in the second step, the dried 1,5-pentanediol is mixed with hydrogen and then enters the vaporizer. The molar ratio of hydrogen to 1,5-pentanediol is 10-5:1 The third step will be vaporized 1,5-pentanediol and hydrogen into the dehydrogenation reactor, under the normal pressure of 0.1MPa, 230-270 conditions, under the action of the dehydrogenation catalyst, 1,5-pentanediol Alcohol is converted into δ-valerolactone, in which the yield of δ-valerolactone exceeds 98%, and the water content of the exported crude product is less than 0.5wt%.

Chemical Properties

clear colorless to pale yellow liquid

Uses

δ-Valerolactone is a compound commonly used to synthesize copolyesters by means of lipase-catalyzed ring opening polymerization.

Uses

δ-Valerolactone (tetrahydro-2H-2-pyranone or δ VL) can be used as a monomer unit in the synthesis of poly(δ-valerolactone)s poly(conjugated ester)s via ring-opening polymerization.
It can also be used as a starting material in the synthesis of (+)-guadinomic acid , sodium δ-hydroxyvalerate , methyl δ-hydroxyvalerate , and 5-hydroxyvaleraldehyde.

Definition

ChEBI: The simplest member of the class of delta-lactone that is tetrahydro-2H-pyran substituted by an oxo group at position 2.

Synthesis Reference(s)

Canadian Journal of Chemistry, 52, p. 3651, 1974 DOI: 10.1139/v74-546
The Journal of Organic Chemistry, 48, p. 5160, 1983 DOI: 10.1021/jo00174a003
Journal of the American Chemical Society, 69, p. 1545, 1947 DOI: 10.1021/ja01198a517

Flammability and Explosibility

Non flammable

Purification Methods

Purify the -lactone by repeated fractional distillation. IR: max 1750 (in CS2), 1732 (in CHCl3),1748 (in CCl4) and 1733 (in MeOH) cm-1 [Huisgen & Ott Tetrahedron 6 253 1959, Linstead & Rydon J Chem Soc 580 1933, Jones et al. Can J Chem 37 2007 1959]. [Beilstein 17 H 235, 17 II 287, 17 III/IV 4169,17/9 V 17.]

delta-Valerolactone Preparation Products And Raw materials

Raw materials

Peroxyacetic acid Cyclopentanone

Preparation Products

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View Lastest Price from delta-Valerolactone manufacturers

Jinan Finer Chemical Co., Ltd

Product: delta-Valerolactone 542-28-9
Price: US $5.00/KG
Min. Order: 1KG
Purity: ≥98%
Supply Ability: 2000mt/year
Release date: 2023-06-15

Hebei Zhuanglai Chemical Trading Co.,Ltd

Product: Delta-Valerolactone 542-28-9
Price: US $180.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 20ton
Release date: 2024-05-17

Hebei Weibang Biotechnology Co., Ltd

Product: delta-Valerolactone 542-28-9
Price: US $0.00-0.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 500000kg
Release date: 2024-10-30

542-28-9, delta-ValerolactoneRelated Search:

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delta-Valerolactone 542-28-9 5-valerolactone Tetrahydro-2H-2-pyranon 542-28-9

delta-Valerolactone in stock 542-28-9 5-valerolactone Tetrahydro-2H-2-pyranon 542-28-9