Caustic soda GB 1886.20-2016 GB 209—2006
National Food Safety Standard food additive sodium hydroxide(GB 1886.20-2016)
industrial used sodium hydroxide (GB 209—2006)
Chemical name Caustic soda; lye, caustic; sodium hydrate; soda lye; white caustic; caustic soda flakes; flake caustic; caustic soda solid; caustic soda pearls; solid caustic soda; Liquid Caustic Soda; Food Additives Sodium Hydroxide; Caustic soda flake;
Molecular formula: NaOH
Molecular weight: 39.997
Model and specification liquid, 30%(food additive ), liquid, IL-DT, II, qualified product(industrial used sodium hydroxide)
Physicochemical property Pure liquid is colorless; relative density (20℃): 1.36g/cm3, non-ignitable; having corrosiveness on copper, iron, glass and ceramics; having corrosion on skin, textiles and paper
Quality standard
National Food Safety Standard food additive sodium hydroxide(GB 1886.20-2016)
Item |
Technical index |
appearance |
bright or light turbid, colorless liquid or with light color |
sodium hydroxide(in NaOH), w/% |
30.0~31.05 |
sodium carbonate(in Na2CO3), w/% |
≤ 0.60 |
arsenic (in As), /(mg/kg) |
≤3.0 |
heavy metal(in Pb), /(mg/kg) |
≤5 |
undissolved substance and organic impurity |
full bright, clean, colorless |
mercury (in Hg), /(mg/kg) |
≤0.1 |
Industrial used liquid sodium hydroxide(GB 209—2006)
Item |
Technical index |
appearance |
sticky liquid |
sodium hydroxide(in NaOH), % |
≥ 30.0 |
sodium carbonate(in Na2CO3), % |
≤ 0.50 |
sodium chloride, % |
≤5.0 |
iron sesquioxide, % |
≤0.008 |
Product usage
As saponifying agent in soap manufacturing industry;
As dewaxing mercerizing agent of gray fabric and neutralizing agent of excessive amounts of acid in dyeing industry;
As causticizing agent in paper making industry;
As leaching agent in leather industry;
As neutralizing agent in water processing;
For production of refined fish oil, cottonseed oil, peanut oil and soybean oil in oil production industry;
As chemical preparation agent in petroleum industry;
Food additive in food industry;
Packaging, transportation and storage Sodium hydroxide should be transported with tank car; shelf life is 1 year; keep it away from acids;