HG/T 5697-2020
p-Sodium sulphonate benzaldehyde
HG/T 5697-2020
HG/T 5697-2020
Chemical reagent Arsenazo Ⅲ
HG/T 5697-2020
Non-ionic surface active agents-Polyalkoxylated derivatives -Determination of hydroxyl value-Phthalic anhydride method
HG/T 5697-2020
Polyglycols for industrial use — Determination of hydroxyl number — Phthalic anhydride esterification method
HG/T 5697-2020
SURFACE ACTIVE AGENTS. POLYGLYCOLS. DETERMINATION OF HYDROXYL NUMBER. PHTHALIC ANHYDRIDE ESTERIFICATION METHOD
HG/T 5697-2020
Test Method for Hydroxyl Groups by Phthalic Anhydride Esterification (Withdrawn 2001)
HG/T 5697-2020
Non-ionic surface active agents — Polyalkoxylated derivatives — Determination of hydroxyl value — Phthalic anhydride method
HG/T 5697-2020
SODIUM CHLORIDE. DETERMINATION OF FLUORIDE CONTENT. PHOTOMETRIC METHOD WITH SODIUM 2-(SULFOPHENYLAZO)-1,8 DIHYDROXYNAPHTHALENE-3,6 DISULFONATE (SPADNS).