Sr
No
Characterstics Requirements as per IS 252 : 1991 Average Quality (As such basis)
On 100% basis 47.5% Caustic Lye (on as such basis)* 32% Caustic Lye (as such basis)* 32% Caustic Lye 47.5% Caustic Soda Lye
1 Sodium Hydroxide (as NaOH) Percent by mass, min. 99.5% 47.5% 32% 32% 47.5%
2 Sodium Carbonate (as Na2CO3) Percent
by mass, max.
0.40 0.19 0.13 0.13 0.19
3 Chlorides (as NaCl) ppm, max. 1000 475 320 30 50
4 Sulphates (as Na2SO4) ppm, max. 1000 475 320 N.D. N.D.
5 Silicates (as SiO2) ppm, max. 200 96 64 08 10
6 Iron (as Fe) ppm, max. 20 9.5 6.4 0.5 1.0
7 Copper (as Cu) ppm, max. 2 0.95 0.64 N.D. N.D.
8 Manganese (as Mn) ppm, max. 1 0.48 0.32 N.D. N.D.
9 Chlorates and Perchlorates (as NaClO3) ppm, max 10 4.8 3.2
10 Matter Insoluble in water Percent by mass, max. 0.05 0.024 0.016 Nil Nil

Note : N.D. = Not Detectable

* Requirement of 47.5% and 32% Caustic Soda Lye is derived from the specification of 100% Caustic Soda Lye

PRODUCT END USAGE

  • Paper & Paper Pulp
  • Soap & Detergents
  • Textile, Dye Stuff Industry
  • Aluminium Industry
  • Linear Alkyl Benzine (LAB)
  • Viscose & Rayon etc
  • Water Demineralisation (Power House & Fertilizer Plants)