Name:Monosodium glutamate

Synonyms: Sodium 5-oxido-5-oxonorvaline

 

Molecular Structure   

 

Molecular Formula: C₅H₈NNaO₄

Molecular Weight: 169.11

Monosodium glutamate, also known as sodium glutamate and MSG, is a sodium salt of the non-essential amino acid glutamic acid. It is used as a food additive and is commonly marketed as a flavour enhancer. It has the HS code 29224220 and the E number E621. Trade names of monosodium glutamate include Ajinomoto, Vetsin, and Accent. It used to be predominantly made from wheat gluten, but is now mostly made from bacterial fermentation; it is acceptable for celiacs following a gluten-free diet.

Although traditional Asian cuisine had often used seaweed extract, which contains high concentrations of glutamic acid, MSG was not isolated until 1907. MSG was subsequently patented by Ajinomoto Corporation of Japan in 1909. In its pure form, it appears as a white crystalline powder; when immersed in water or saliva, it rapidly dissociates into sodium cations and glutamate anions (glutamate is the anionic form of glutamic acid, a naturally occurring amino acid).

Like the sodium salts of other amino acids, MSG is a stable colourless solid that is degraded by strong oxidizing agents. It exists as a pair of mirror image stereoisomers (enantiomers), but only the naturally occurring L-glutamate form is used as a flavour enhancer.

Specification:

Item	Limit
Appearance	White or colorless crystal
Assay	99.0% to 100%
state of solution (transmittance)	Clear and colorless not less than 98.0%
chloride (cl)	Not more than 0.039%
Ammonium(NH4)	Not more than0.02%
Sulfate(so4)	not more than 0.028%
Iron (Fe)	Not more than 5PPM
Heavy metals (pb)	Not more than 5 PPM
Arsenic (ASO3)	Not more than 0.5PPM
Other amino acids	Conforms
Loss on drying	Not more than 0.30%
specific rotation (a)20	+24.6 - +25.3
PH	6.7 - 7.2

Packing:1kg/bag

Storage:be preserved in shady,cool and dry place.

Shelf life:2years