棕櫚酸(英語：Palmitic acid)，又稱軟脂酸，IUPAC系統名為十六(烷)酸(英語：Hexadecanoic acid)，是一種飽和高級脂肪酸，以甘油脂的形式普遍存在於動植物油脂中，在自然界中分布很廣。棕櫚油、棕櫚仁油、牛油、乳酪、牛奶及肉類與多種植物油均有著這種脂肪酸，母乳中含量亦相當豐富。

工業上由牛油、豬油等動物脂肪或棕櫚仁油等植物油經皂化後製得；棕櫚酸陰離子是棕櫚酸在生理酸鹼值中的觀察型態。

https://zh.wikipedia.org/zh-tw/%E6%A3%95%E6%AB%9A%E9%85%B8

【Palmitic Acid】

Rating: GOOD
Categories: Occlusive/Opacifying Agent, Cleansing Agent, Emulsifier

Palmitic acid is a fatty acid found naturally in skin, as well as in palm oil, palm kernel oil, butter, cheese, and meat. It is the most common fatty acid found in animals, plants, and microorganisms. It is used as the basis for many palmitate ingredients, such as isopropyl palmitate. Palmitic acid has many functions in cosmetics, such as a detergent cleansing agent and an emollient.

In a cleanser, it has the potential to be drying depending on which other ingredients it’s combined with and the cleanser’s pH level. In moisturizers, palmitic acid is a very good emollient while its emulsifying abilities help keep unlike ingredients from separating.

Palmitic acid has been determined safe as used in cosmetics when used in concentrations up to 13%.

https://www.paulaschoice.com/ingredient-dictionary/ingredient-palmitic-acid.html