Formic acid content | 85% min | 90% min | 94% min |
(Cl-) | 0.006% max | 0.005% max | 0.005% max |
(SO42-) | 0.02% max | 0.002% max | 0.002% max |
(Fe3+) | 0.0006% max | 0.0005% max | 0.0005% max |
Residue | 0.06% max | 0.020% max | 0.020% max |
Color (Pt-Co),Hazen Units | 30 max | 20 max | 20 max |