English
biological source
synthetic
Quality Level
Assay
≥95% (HPLC)
form
crystalline
impurities
α-carotene, essentially free
color
dark red-purple to red-brown
mp
178-179 °C
solubility
hexane: soluble 100 μg/mL
DMSO: 30 μg/mL
H2O: insoluble
ε (extinction coefficient)
2160-2280 at 478-479 nm in hexane at 1% (vs. 2280, lit.)
2450-2590 at 450-452 nm in hexane at 1% (vs. 2590, lit.)
storage temp.
−20°C
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