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Sodium hydroxide 99%
addtime：2010-4-27　　from：　　　Reads：4754

Sodium hydroxide by a hydronium-film process
(98%, 99% flake caustic soda /piece/pearl)
Molecular formula: NaOH
Molecular weight:  40
Appearance: white and bright, slight color allowed
 
Properties 
 
     Strong humidity-absorbability, easy soluble in water, corrosivity, and produce a salt by a neutralizing with an acid.
Usage 
 
      Especially for papermaking, soap, textile,printing & dyeing, synthetic fiber, pesticide,petrochemical,pharmacy, food and power industries.
 
Package 
 
      woven bag lined with plastic bag,25kg per bag.
 
Storage and transport
 
      China Dangerous Code:82001,UN No.caustic soda solid 1823, caustic soda liquid 1824, LMDG Page: caustic soda solid 8225,caustic soda liquid 8226.Marks for package: Corrosive. Packing: ll. Caustic sodium hydroxide should be stored in dry warehouse, make sure the package is intact, and avoid pollution,damp and mixed with acid.
 
Safety
      Sodium hydroxide is strong corrosivity,so operator must wear labor protection, such as shielding spectacles and rubber gloves.
Exexutive Standard:GB 11212-89
 
Superior grade
First grade
Sodium hydroxide % ≥
 99.5
99.0 
 Sodium sulfate  % ≤
 0.02
 0.04
 Sodium chloride %≤
 0.45
0.50 
 Ferric oxide % ≤
 0.004
 0.005
 Silicon dioxide %≤
 0.004
 0.006
 Sodium sulfate %≤
 0.050
 0.070
 Copper % ≤
 0.0002
 0.0003
 Calcium % ≤
 0.005
 0.008
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