... O3content,≥%96Moisture,≤%1.0Water Soluble,≤%0.5Residue(320 Head)%0.3Oil Absorption(ml/100g)15~25pH Value3. ... conditions: store in a dry place, avoid damp,high temperature,stong light and isolate the acid-base ... can mix different items in one container.2.Quality control,before shipment,free sample for test after ... photo before shipmentany question, welcome here! (high quality) Iron red oxide 130.190