... 8, PH >8 stability when dropped, stored at room temperature for a year, when 50 °C storage half a year, few ... liquid, slightly smell, was found no sediment PH 3.0-5.0 Activity content % 2.5 ±01 Proportion (d420) 1.19±0.02 Heavy ... should avoid direct contact with the mucous membrane products used for.Method of use: formula to join this product, the operation ...