性能描述

assay    ≥97.0% (UV) 
impurities    ≤0.001% heavy metals 
loss    ≤0.2% loss on drying 
mp    176-184 °C (dec.) 
solubility    chloroform: soluble10 mg/mL, clear, dark orange-red 
storage temp.    -20°C 

As a probe of lipid domains of reconstituted human plasma low-density lipoprotein1

Biochem/physiol Actions
The most important of the provitamins A, β-carotene can be classified as an antioxidant due to its inhibition of radical initiated peroxidation in vitro. However, in vivo it appears to act either as an antioxidant or a prooxidant depending on cellular environment. It reduces the incidence of many cancers, but enhances lung cancer incidence in smokers.