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Caustic Soda Flakes


Ref: IS 252 : 2013(Ammend No. 2,2018)
CL Ref Test Parameters Test Method Specific Requirements
3.1 Form and Description
3.1.1 The Material is free from foreign matter dirt and other impurities
3.2 Relative Density at 25ºC    
3.3 & 3.4 Sodium Carbonate (as Na2CO3) % m/m, Max A-3 0.4
3.3 & 3.4 Sodium Hydroxide (as NaOH) % m/m, Min A-4 97.0
3.3 & 3.4 Chlorides (as Cl-) % m/m, Max A-5 0.03
3.3 & 3.4 Sulphates (as SO4) % m/m, Max A-6 0.03
3.3 & 3.4 Silicate (as SiO2) % m/m, Max A-7 0.02
3.3 & 3.4 Iron (as Fe) ppm, Max A-8 20.0
3.3 & 3.4 Copper (as Cu) ppm, Max A-9 2.0
3.3 & 3.4 Manganeese (as Mn) ppm, Max A-10 1.0
3.3 & 3.4 Chlorate & perchlorates (as NaClO3) ppm, Max A-11 10.0
3.3 & 3.4 Matter Insoluble in Water % m/m, Max A-12 0.05
3.3 & 3.4 Total Mercury (as Hg) ppm, Max A-13 0.02
3.3 & 3.4 Sodium Hydroxide (as NaOH)% m/m on dry basis, Min A-14 99.5

 

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