... 1.19, viscosity (23 °C) 5.0 mPa · s, freezing point-18 ~ 21.5 °C, PH 3.5 ~ 5.0, it is soluble in water ... standardappearance Light amber or colorless liquid, slightly smell, was found no sediment PH 3.0-5.0 Activity content % 1.5 Proportion (d420) 1. ... , hair gel, wash bath milk, surfactant, and cosmetics preservatives raw material, but should avoid direct contact with the mucous membrane products ...