Technical requirements for industrial grade sulfuric acid products:

Industrial sulfuric acid should meet the following requirements

Project indicators

Special sulfuric acid, concentrated sulfuric acid, fuming sulfuric acid

Excellent products, first-class products, qualified products, first-class products, qualified products

Sulfuric acid (H2SO4) content,% ≥ 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 0.10

Iron (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 0.01

Mercury (Hg) content,% ≤ 0.0005

Nitrogen oxide (calculated as N) content,% ≤ 0.0001

Sulfur dioxide (SO2) content,% ≤ 0.01

Chlorine (Cl) content,% ≤ 0.001

Transparency, mm ≥ 160 50 50

Chromaticity, ml ≤ 1.0 2.0 2.0

Industrial grade sulfuric acid