飘雪在线影院观看免费完整版高清_a毛片毛片AV永久免费_国产日韩高清不卡_国产精品乱码一二三区_成人高清无码不卡_婷婷丁香啪啪_欧美成人h版电影壮志凌云_在线看片免费**久试看_欧美色图校园春色_国产无套抽出白浆来

N-ACETYL-D-GLUCOSAMINE
Application

N - acetyl - D - glucosamine is a hyaluronic acid monomer which is the basic composition unit of important organism polysaccharides. It extensively exists in the exoskeletons of shellfish and has become a new type of biochemical drugs, drug intermediates , high-end cosmetics and food additives for the important functions, such as immunity enhancement, antioxidant, keeping moisture, anti-free radicals, etc.

Product parameter
  • Molecular formula: C8H15NO6
  • Chemical construction
  • CAS: 7512-17-6
  • properties: white crystalline, no smell, slightly sweet taste, easily dissolved in water, slightly dissolved in methanol, and undissolved ethanol and other organic solvents.
  • packaging: Inner with two layers of plastic bags, outer paper drum. Net weight: 25 kg/drum .
  • Storage and transportation: Stored in a dry, clean, shady and cool place; Transported according to the packing requirements, with light loading and discharging, keeping the direction of package the same to products; Shall not be mixed with hazardous, toxic and pollution items; Shall be protected from rain.

Items

Specifications

Appearance

White powder

Assay

98.0~102.0%

Specific rotation

+39.0°~+42.0°

PH

5.5~7.5

Residue on ignition

≤0.1%

Loss on drying

≤0.5%

Heavy metals

≤10ppm

Iron

≤10ppm

Arsenic

≤3ppm

Melting Point

196℃-205℃

Chloride

≤0.5%

E.Coli.

Negative

Total plate count

≤1000cfu/g

Yeast and mold

≤100cfu/g

Transmittance

≥90.0%

back