... (%)98%Specific rotation+24.8~+25.3°Loss on drying ≤0.5%Fe mg/kg ≤5 ppmSulphate (SO42-) ≤0. ... meshPacking1. Kraft paper bag or pp bag of 25 kg or 22.7 kg net each2. 3g, 9g, 10g, 18g, ... 50g, 80g, 100g, 200g, 227g, 250g, 500g , 1000g polythene bags in carton3. 454g*25 ... *2/carton, 454g*25/carton, 454g*50/carton, 400g*40/carton, ...