[2] IFRA, Guideline, 1975.
26種被歐盟規範禁用的化妝品添加香料。
http://maskingdom.pixnet.net/blog/post/151084026-26%E7%A8%AE%E6%AD%90%E7%9B%9F%E8%A6%8F%E7%AF%84%E7%9A%84%E5%8D%B1%E9%9A%AA%E9%A6%99%E6%96%99%EF%BC%81
Citral
THE GOOD: Helps to improve the scent of formulations and may have the ability to be both antibacterial and anti-inflammatory.
THE NOT SO GOOD: Can be sensitizing to some skin types.
WHO IS IT FOR? All skin types except those that have an identified allergy to it.
SYNERGETIC INGREDIENTS: Works well with most ingredients
KEEP AN EYE ON: Sensitive skin types may want to avoid products with higher concentrations of citral.
Source: The Derm Review