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Caustic Soda

Details for Caustic Soda

Caustic Soda


Inorganic chemicals

Caustic Soda
CAS NO: 1310-73-2
EC NO: 215-185-5
Molecular Formula: NaOH
Molecular Weight: 41.0045
InChI: InChI=1/Na.H2O/h;1H2/q+1;/p-1/rHNaO/c1-2/h2H
Product description:
Appearance White flakes/Pellets, colourless viscous liquid.
Boiling point-Lye /Flakes 1390oC/142-148癈
Melting point-Lye / Flakes 318.4癈
Specific Gravity - Lye / Flakes 2.12 at 24癈/4癈
Physical state Solid/Lye
Solubility in water Soluble
pH 14
Odour Odour less
Others Soluble in alcohol, methanol, and glycerol

Chemical Identity
Formula: NaOH CAS No. 1310-73-2
UN No. 1823/1824 Codes/Label-corrosive, Class-8
Hazchem Code: 2R

NaOH (on dry basis) 99.5% (min)
Na2CO3 (on dry basis) 0.4 % (max)
NaCl (on dry basis) 0.1 % (max)
Iron as Fe (on dry basis) 20 PPM (max)
Sulphate as Na2SO4 0.1% (max)
Silicate as SiO2 0.02 % (max)
Copper (Cu) 2.0 PPM (max)
Manganese (Mn) 1.0 PPM (max)
Chlorate & per chlorate as NaCIO3 10 PPM (max)
Water Insoluble matter 0.05 PPM (max)

Permissible Exposure Limit 2 (Ceiling) Mg/m3
TLV (ACGIH) 2 (Ceiling) Mg/m3

Field of Application

Caustic Soda is used in:

  • Pulp and paper (in digestion process for the extraction of Chlorlignin of wood
    and pulp.)
  • Aluminum (for the extraction of Alumina from Bauxite.)
  • Soap (in saponification reaction.).
  • Detergent (in the process of neutralizing LAB.)
  • Petroleum Refining (for naturalizing H2S in light distillates.)
  • Rayon (in viscous section for the extraction of cellulose from the pulp.)
  • Power Plants (in anionic resin regeneration in D.M. Plant.)
  • Pharmaceuticals (in Paracetamol, Analgin, Ranitidine, Ibuprofen, Ciproflaxacin etc.)
Caustic Soda Lye: M.S.R.L./M.S. Road tankers & MS Rail Wagons.
Flakes 50 kg HDPE bags with LDPE Liner.
Synonyms: 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;Solid Sodium hydroxide;Caustic Soda;Sodium Hydrate;Liquid CS;
Molecular Structure: Caustic Soda 1310-73-2
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