Alginic Acid

Alginic acid, a polysaccharide extracted from kelp-like Phaeophyceae, formed by α-L-Mannuronic acid (M section) and β-D-Guluronic acid (G section) connected through 1,4-glucosidic bond. The acid is instability state and can react with positive metal ion to form alginate series production. 
Molecular formula: (C6H8O6) n
Properties:  White or light yellow powder, insoluble in water, odorless and almost tasteless.
Main applications: 
1. Medicine industry: used as the main material of the Gaviscon tablets, tablets disintegration agent and hypotensor element;
2. Food industry: Act as the food addictive and for health care food.
Specifications:
High swell type: swelling test ≥22
Common type: 
Packing Specification: 25Kg (Net weight) per bag, with compound package bag (a polyethylene bag as liner and a compound plastic woven bag as the outer layer)  
Executive Standard:  WS1-211-87-89

Items	USP34	BP7.0	WS 1-211-87-89	Q/HZL001-2011
Acidity	≥230	/	≥230	≥230
PH value,  3% water solution	/	/	1.5～3.5	1.5～3.5
Loss on drying %	≤15.0	≤15.0	≤15.0	≤15.0
Ignition residue %	≤4.0	Sulphated ash≤8.0	≤5.0	≤5.0
Molysite %	/	/	≤0.05	≤0.05
Heavy metals(Pb),%	≤0.004	≤0.002	≤0.004	≤0.004
Arsenic  %	≤0.0003	/	≤0.0003	≤0.0003
Starch	/	Carboxyl content 19-25%	No transient blue color	No transient blue color
Viscosity (mPa·s),1%	/	/	0～50	0～50
Microorganism	≤200	Total bacteria≤100 E. coli & Salmonella: Negative	/	/