Productgradeappearance (20℃~30℃)PH value (1% water test)color (Pt-Co)effective ingredientphenolT830pharmaceuticalcolorless transparent liquid6.0~8.0≤50≥99.5≤25ppmT835refined gradecolorless transparent liquid6.0~8.0≤50≥99.0≤300ppmT840industrial gradelight yellow transparent liquid5.0~7.0≤100≥90.0——