Striking changes in volatile profiles at sub-zero temperatures during over-ripening of ‘Beibinghong’ grapes in Northeastern China was written by Lan, Yi-Bin;Qian, Xu;Yang, Zhong-Jun;Xiang, Xiao-Feng;Yang, Wei-Xi;Liu, Tao;Zhu, Bao-Qing;Pan, Qiu-Hong;Duan, Chang-Qing. And the article was included in Food Chemistry in 2016.SDS of cas: 5444-75-7 The following contents are mentioned in the article:
The evolution of free and glycosidically bound volatile compounds in ‘Beibinghong’ (Vitis vinifera × Vitis amurensis) grape berries throughout on-vine over-ripening and freezing processes was studied in two vintages. The aroma profiles of ‘Beibinghong’ icewine berries were characterized by C6 compounds, higher alcs. and terpenoids in free fractions and carbonyl compounds, higher alcs., C6 alcs. and terpenoids in bound fractions. With regard to free volatile compounds, there was a decrease in the concentration of C6 compounds, terpenols and norisoprenoids and an increase of terpene oxides during over-ripening process. A striking alteration of volatile profile occurred at sub-zero temperatures, particularly for the free fractions such as C6 alcs., higher alcs. and oxidative terpene derivatives These changes were attributed to a series of reactions (biotransformation, oxidation and anaerobic metabolism) induced by water loss and especially freeze-thaw cycles. PCA revealed temperature and rainfall affected the accumulation of volatile compounds during over-ripening processes. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7SDS of cas: 5444-75-7).
2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. SDS of cas: 5444-75-7
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics