Industrial sulphuric acid

industrial sulphuric acid
This standard is for industrial sulphuric acid. 
Molecular formula : H2SO4
Relative density :98.08
Item Index 
Special sulfuric acid Concentrated sulfuric acid 
Superior grade Top grade Qualified Superior grade Top grade Qualified 
sulfuric acid(H2SO4) content: % ≥ 92.5 or 98.0 92.5 or 98.0 92.5 or 98.0 92.5 or 98.0
free sulfur trioxide (SO3)Content, % ≥ 20.0 20.0 20.0
ash content % ≤ 0.02 0.03 0.03 0.10 0.03 0.03 0.10
ferrum(Fe) content, % ≤ 0.005 0.010 0.010 0.010 0.010 0.030
arsenic(As) content, % ≤ 8*10-5 0.0001 0.005 0.0001 0.0001
lead (Pb) content, % ≤ 0.001 0.01 0.01
mercury (Hg) content, % ≤ 0.0005
nitric oxide(in N) conten, % ≤ 0.0001
sulfur dioxide(SO2) conten, % ≤ 0.01
chlorine (Cl) content , % ≤ 0.001
transparency, mm ≥ 160 50 50
chromaticity ml ≤ 1.0 2.0 2.0

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