SD Alcohol
SD Alcohol 40, SD Alcohol 40B, Denatured Alcohol, Alcohol Denat, Dehydrated Ethanol, Alcohol Denatured
變性酒精, 變性乙醇, SD 乙醇 40, SD 乙醇 40-B
Cas No:64-17-5
為確保用於化妝品中之酒精無法轉移為其他用途,因此經過特殊程序處理(加入不可食用成份)後之酒精,又稱為 SD Alcohol (Specially Denatured alcohol),主要為宣告其不可用以飲用,而在歐洲地區為了適用於國際名稱慣例將其命名為 Alcohol Denat[1]。

SD Alcohol 仍然為酒精成份,只是據說因為經過處理,其蒸發速度較快,也因此能將化妝品的香味更快散逸而出,且停留於肌膚的時間也較短[1]。

以常見添加物(變性劑)而言,使用t-Butyl alcoholdenatonium benzoatediethyl phthalatemethyl alcohol製成的變性酒精,安全性優於使用quassin、brucine、brucine sulfate者。在化妝品及護膚產品中許可使用的變性酒精包括SD Alcohol 3-A, 30, 39, 40。

由於其刺激性之考量,雖具有良好之輔助卸妝效力,但不宜經常出現在卸妝類產品中,拒絕指數為 3/5(越高越不好)[2],可讓其他成份感覺清爽、不黏膩又好推勻,但會滲入健康細胞中,溶解表皮脂質,長期使用會造成皮膚逐漸黯淡無光澤[2]。
[1] James Whittall, MenEssentials President, \"Alcohol Anonymous\", 2004/11
[2] 張麗卿,『優質保養品選擇策略』,聯經出版社,2003/07/10。
2010-06-01

There are several grades of denatured alcohol, but the denaturants used are generally similar. The formulation for completely denatured alcohol, according to British regulations is typical:

Completely denatured alcohol must be made in accordance with the following formulation: with every 90 parts by volume of alcohol mix 9.5 parts by volume of methanol or a substitute for methanol and 0.5 parts by volume of crude pyridine, and to the resulting mixture add mineral naphtha (petroleum oil) in the proportion of 3.75 litres to every 1000 litres of the mixture and synthetic organic dyestuff (methyl violet) in the proportion of 1.5 grams to every 1000 litres of the mixture.

2016-01-03

雷射後7天內不可使用含有美白與酒精成份怕反黑。這個"變性酒精"是否同反黑成份

2017-01-26

Paula's Choice on denatured alcohol:
'When you see (denatured alcohol) listed among the first six ingredients on an ingredient label, without question they will aggravate and be cruel to skin. No way around that, it’s simply bad for all skin types. Consequences include dryness, erosion of the surface of skin (that’s really bad for skin), and a strain on how skin replenishes, renews, and rejuvenates itself. Alcohol just weakens everything about skin.
http://www.paulaschoice.com/expert-advice/skin-care-basics/_/alcohol-in-skin-care-the-facts

S
2018-10-04

The Paula's Choice comment is correct. It is best to avoid denatured alcohol entirely if possible.

h
2018-12-23

然怪混合乾性皮膚使用 沒有改善! 又被櫃姐騙了...

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