SA (Sialic Acid), the scientific name is called "n-acetyl-neuramic acid", is a naturally occurring carbohydrate. It was originally isolated from mucin in the submandibular gland, hence the name. Sialic acid is usually found in the form of oligosaccharides, glycolipids, or glycoproteins. The brain has the highest amount of sialic acid in the human body. The amount of sialic acid in the gray matter of the brain is 15 times that of the liver, lungs and other internal organs. The main food source of sialic acid is breast milk, which is also found in milk, eggs, and cheese.

  Name: N-Acetylneuraminic acid  

  Alias name: sialic acenulanic acid, N-acetylmannose pyruvate, N-acetylsialic acid, Molecular

  Formula: C11H19NO9 

  CAS number: 131-48-6 

  EINECS number: 205-023-1 

  Cosmetic grade sialic acid, USP food grade sialic acid

ANALYSIS  分析	SPECIFICATION 规格	TEST METHODS 测试方法
色泽	白色	取少许样品，置于白纸或玻璃上，用目测的方法，在自然光下观察产品的色泽、性状、有无杂质。取少许粉末，置于舌尖处，尝完后立即以大量水漱口。 取少量粉末，鼻嗅
性状	粉末状、无结块
杂质	无肉眼可见杂质
滋味、气味	具有本品固有滋味和气味、无异味
N-乙酰神经氨酸/（g/100g）	≥ 98	中国药典
硫酸盐（以SO4 2-计算）/（g/100g）	≤ 0.05	中国药典
pH 值(2%水溶液)	1.8-2.3	中国药典
干燥失重/（g/100g）	≤ 2	中国药典
水分/（g/100g）	≤ 2	GB 5009.3
灰分/（g/100g）	≤ 2	GB 5009.4