... formate and synthetic sodium formate to produce formic acid.1,Application fields of formic acid:a, pharmaceutical industry: Caffeine,Enzinnes,Aminopyrine,Vitamine ... GradeFirst GradeQualified GradePurity%,≥908585Chroma(Pt-Co)≤1020 Dilution test(Acid+water=1+3)%, ≤No cloudQualified Chloride(C1)%, ≤0.0030.0050.020Sulfate ... .00050.0010Residue on evaporation,%, ≤0.0060.0200.080 Formic acid 85% manufacturer