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Name： Propylene Glycol Alginate ( PGA )

Synonyms：  N-4-[(2-Amido-4-oxo-1,4-dihydro-6-terene)methylamino]benzoyl-L-glutamic acid; Vitamin B; Vitamin B11; Vitamin BC; Vitamin M; L-Pteroylglutamic acid; PGA

Molecular Formula：C₁₉H₁₉N₇O₆

Molecular Weight：441.40

CAS Registry Number：59-30-3

EINECS：  200-419-0

Propylene glycol alginate (PGA) is an emulsifier, stabilizer, and thickener used in food products. It is a food additive with E number E405. Chemically, propylene glycol alginate is an ester of alginic acid, which is derived from kelp. Some of the carboxyl groups are esterified with propylene glycol, some are neutralized with an appropriate alkali, and some remain free.

Speciafication

Product name	Propylene Glycol Alginate ( PGA )
Molar mass	234.21 per structural unit (theoretical)
Appearance	white to yellowish brown filamentous, grainy, granular or powdered forms
Solubility in water	Soluble
Melting point	250 ºC