... smoke 2.adpoting advanced technology 3.best service 4.high quality CAS No.:64-18-6HS Code:291511004UN No ... 4%) and liquid formic acid also tends to supercool.Specification: Item Top Grade First Grade Qualified Grade Purity%,≥908585Chroma(Pt-Co)≤1020Dilution ... of formate, formic acid ester, formamide and so on, or also used in medicine, printing and dyeing, dye, leather industry formic acid 85%