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J. Cosmet. Sci., 59, 431–440 (September/October 2008)

Red pigment from Lithospermum erythrorhizon by supercritical CO2 extraction

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Synopsis

In this study, a stable red pigment was prepared from Lithospermum erythrorhizon via supercritical carbon dioxide extraction. The optimal extraction conditions were 400 bar and 60°C. The patch tests indicated that up to 10% of the red pigment was acceptable from a skin irritation standpoint. According to the results of the CIE LAB chromaticity test, the color difference was acceptable when compared to commercial synthetic red pigments. The light-illuminated color stability test indicated that the pigment was more stable than the red pigment extracted with ethanol. The higher stability was also demonstrated in the DPPH anti-oxidant activity test. The supercritical red pigment harbored elevated amounts of shikonin and derivatives, and appears to be usable as a stable red pigment for cosmetic color products.
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Document Type: Abstract

Affiliations: 1: Cosmetic R&D Center, Amore Pacific Inc., Yongin, Gyeonggi, 449–729, Republic of Korea 2: Department of Molecular Science & Technology

Publication date: October 1, 2009

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