Red pigment from Lithospermum erythrorhizon by supercritical CO2 extraction.
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 degrees 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 antioxidant 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.
Lee
Hwa-Young
HY
Cosmetic R&D Center, Amore Pacific Inc., Yongin, Gyeonggi, 449-729, Republic of Korea.
Kim
Yoon-Jung
YJ
Kim
Eun-Jung
EJ
Song
Young-Keun
YK
Byun
Sang Yo
SY
D000328:Adult; D001713:Biphenyl Compounds / Q000737:chemistry; D002245:Carbon Dioxide / Q000737:chemistry; D025924:Chromatography, Supercritical Fluid / Q000295:instrumentation / Q000379:methods; D003358:Cosmetics / Q000009:adverse effects / Q000302:isolation & purification* / Q000494:pharmacology; D004355:Drug Stability; D005260:Female; D016166:Free Radical Scavengers / Q000302:isolation & purification / Q000494:pharmacology; D006801:Humans; D006834:Hydrazines / Q000737:chemistry; D029684:Lithospermum / Q000737:chemistry*; D008297:Male; D009285:Naphthoquinones / Q000009:adverse effects / Q000302:isolation & purification / Q000494:pharmacology; D010851:Picrates; D010860:Pigments, Biological / Q000009:adverse effects / Q000302:isolation & purification* / Q000494:pharmacology; D010936:Plant Extracts / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D012882:Skin Tests
D001713:Biphenyl Compounds; D003358:Cosmetics; D016166:Free Radical Scavengers; D006834:Hydrazines; D009285:Naphthoquinones; D010851:Picrates; D010860:Pigments, Biological; D010936:Plant Extracts; D002245:Carbon Dioxide; C016101:shikonin; C004931:1,1-diphenyl-2-picrylhydrazyl