Molecular weight : 194 
Molecular formula: (C5H7O4COOH)n 
Alginic acid is a natural polysaccharide extracted from seaweed.It is made of the two types of aldehyde acids with D-mannose uronic acid and L-Gu Luo uronic acid.Flaxen powder,isn＇t in water. 
Main applications in the following list： 
1. New drug PSS 
PSS is manufactured taking alginic acid as main material. Medicinal study and clinical test shows that the drug has strong decentralizing blood stickness, can be used to lower blood adeps, expand bloodvessels, improve microcircul ation lower blood pressure and blood sugar etc. It is in either solution or tablets two forms. Well absorbed by injecti on or oral administration, suitable both for remedy or precaution. 
2. Gastropine 
The tablets are manufactured from mixing with alginic acid, aluminum hydroxide, magnesium trisilicate etc several drugs. It has the functions of neutralization gastric acidity, relief gastric spasm and stomachache, stimulating neoge nesis of mucous membrane,curing gastric ulcer, and can improve gastric function.

3. sewage treatment 
Resin like high-molecular compound, which has better adsorptive powerand stength, can be formed by reaction of calcium salt with soluble salt solution of alginic acid and phytlc acid. This kind of resin has big adsorptive capacity, high resistance against calcium and magnesium ion. Thus the resin has better effect in purifying water and long service life. 
ALGINIC ACID QUALITY STANDARD: WS1-211-87

ALGINIC ACID QUALITY STANDARD 

Item	THE MINISTRY OF NATIONAL HEALTH STANDARD WS1-211-87
Index
Category
APPEARANCE	LIGHT YELLOW POWDER
STARCH	DO NOT SHOW BLUE COLOR
MOISTURE ％	≤15.0
IGNITION RESIDUE ％	≤5.0
MOL YSITE ％	≤0.05
HEAVY METALS ％	≤0.004
ARSENIC ％	≤0.0003
VISCOSIYT ％ (≤)cps	≤50 cps
ACID VALUE(≥)	≥230
ACID DEGREE	1.5-3.5