Formic acid content 85%min 90%min 94%min (C1-) 0.004%max 0.002% max 0.001%max (SO42-) 0.002% max 0.001%max 0.001%max (Fe3+) 0.0004%max 0.0004%max 0.0004%max Residue 0.02%max 0.015%max 0.015%max Color(Pt-Co),Hazen Units 20max 10max 10max Usage: A. Leather industryTanning, etc. B. Textile industryNatural Rubber. C. Rubber industryCoagulation, etc. D. Paper industry Pulp manufacturing, etc.