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Caustic soda

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Caustic soda 

Item Property units Test method Value
1 NaOH wt % ASTM D-3875 48.5 min
2 Na2CO3 wt % ASTM D-3875 0.4 max
3 NaCL wt.ppm Spectrophotometry(Denora) 15 max
4 Na2SO4 wt.ppm ASTM D-516/D-4130 15 max
5 Al2O3 wt.ppm standard method 10 max
6 Total Fe as Fe2O3 wt.ppm ASTM D-2790 6 max
7 SiO2 wt.ppm ASTM D-859-88 5 max
8 Total Ca as CaO wt.ppm ASTM D-511 10 max
9 Hg wt.ppm

Mercury analysis

0.5 max
10 Sp.Gr.@15.6’C ------- ASTM D-3875 1.515 min
11 appearance -------

Visual

clear
12 Na CLO3 wt.ppm Vogel analyses 120 max

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