432-70-2

Basic information

• Product Name: .beta.,.epsilon.-Carotene
• Synonyms: .beta.,.epsilon.-Carotene;Chebi:28425
• CAS NO: 432-70-2
• Molecular Formula: C₄₀H₅₆
• Molecular Weight: 536.87
• Mol File: 432-70-2.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 644.9°Cat760mmHg
• Flash Point: 341.2°C
• Appearance: /
• Density: 0.938g/cm³
• Storage Temp.: -20°C
• CAS DataBase Reference: .beta.,.epsilon.-Carotene(CAS DataBase Reference)
• NIST Chemistry Reference: .beta.,.epsilon.-Carotene(432-70-2)
• EPA Substance Registry System: .beta.,.epsilon.-Carotene(432-70-2)

Safety Data

• WGK Germany: 3
• Hazardous Substances Data: 432-70-2(Hazardous Substances Data)

Usage

Uses

α-Carotene is the second most common form of carotene. A high dietary intakes of α-Carotene and other carotenoids may decrease the risk of gastric cancer, but data from population studies are inconsistent.

Definition

ChEBI: A cyclic carotene with a beta- and an epsilon-ring at opposite ends respectively.

Biochem/physiol Actions

One of the primary isomers of carotene, racemic form of metabolite in carotenoid biosynthesis, biosynthesis of plant secondary metabolites, biosynthesis of terpenoids and steroids and the biosynthesis of secondary metabolites

Upstream product

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Downstream Products

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Relevant articles and documents

Kinetic Model for Studying the Isomerization of α- and β-Carotene during Heating and Illumination

The thermoisomerization and iodine-catalyzed photoisomerization of all-trans-α- and all-trans-β-carotene were kinetically studied using regression models. Carotene samples were heated at varied temperatures or exposed to a 20 W light for varied lengths of time. Isomerization and degradation reactions were monitored using HPLC with diode array detection. Four cis isomers of β-carotene and three cis isomers of α-carotene were separated and detected. The degradations of both carotenes under heating at 150 deg C or iodine/light treatment may fit the reversible first- order model. 9-cis and 13-cis were the major β-carotene isomers formed during heating, while 13,15-di-cis was favored during iodine-catalyzed photoisomerization. The formation of 9-cis and 13-cis form all-trans-α-carotene was dependent upon the extent of heat or iodine/light treatment, and the latter was formed in greater amount under either treatment. Keywords: α-Carotene; β-carotene; thermoisomerization; photoisomerization; kinetic study