Alginic acid specifications: a) Appearance: light yellow powder b) Starch: does not show blue color c) Moisture: 15.0% max. d) Ignition residue: 5.0 max. e) Molysite: 0.05% max. f) Heavy metals: 0.004% max. g) Arsenate: 0.0003% max. h) Viscosity: 50Mpa.s max. i) Acid value: 230 max. j) Acid degree: 1.5 - 3.5 k) New medicine PSS pharmaceutics l) Stomach curative