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The aim of this study was to evaluate the in vitro skin phototoxicity of cosmetic formulations containing photounstable and photostable UV - filters and vitamin A palmitate , assessed by two in vitro techniques : 3T3 Neutral Red Uptake Phototoxicity Test and Human 3 - D Skin Model In Vitro Phototoxicity Test .
 Chemical: vitamin A palmitate
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: vitamin A palmitate