L-Carnosine 99% CAS Number:305-84-0 Molecular Formula:C9H14N4O3 Molecular Weight:226.23 Assay:99% Standard:USP Country of Origin:China Shelf Life:2 Years Product description: 1)L-Carnosine (beta-alanyl-L-histidine) is a dipeptide of the amino acids beta-alanine and histidine. It is highly concentrated in muscle and brain tissues. 2)L-Carnosine and carnitine were discovered by Russian chemist V.Gulevich.Researchers in Britain,South Korea,Russiaand other countries have shown that carnosine has a number of antioxidant properties that may be beneficial. Carnosine has been proven to scavenge reactive oxygen species (ROS) as well as alpha-beta unsaturatedaldehydes formed from peroxidation of cell membrane fatty acids during oxidative stress. Carnosine is also a zwitterion, a neutral molecule with a positive and negative end. L-Carnosine Specification:
ITEMS
STANDARDS
Appearance
White powder
Color
White to almost white
Smell
Odorless
Identification
Must comply
Loss on Drying
NMT 1.0%
Heavy Metals
NMT 10ppm
Arsenic
NMT 1ppm
Lead
NMT 3ppm
Cadmium
NMT 1ppm
Mercury
NMT 0.1ppm
Residue on Ignition
NMT 0.1%
Specific Rotation
+20.0°~ +22.0°
Melting Point
250°C ~ 265°C
PH(in 2% water)
7.5~8.5
L-Histidine
NMT 1.0%
β-Alanine
NMT 0.1%
Total Aerobes Counts
NMT 1000cfu/g
Yeast & Molds
NMT 10cfu/g
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