Agar agar food grade,the specification is following: Moisture ≤22% Undissolving in Water ≤1% Starch not blue Ash ≤5% As ≤0.0001% Heavy Metal(calculated by Pb) ≤0.004% Water Absorbent 75ml Max Sieve residue (sieve-60) --------------- Gel Strength 900 / 1200(g/cm2) Color from white to light yellow