... QualityFirst QualityQualifierColor (Pt-Co) ≤31530Density ( 50 οC ) , g/cm31.13-1.161.13-1.171.13-1 ... .18Chlorine Assay, %41-4340-44Viscosity ( 50 οC ) , mPa· s140-450≤500≤650Refractive Index1.500- ... QualityFirst QualityQualifierColor (Pt-Co) ≤100250600Density ( 50 οC ) , g/cm31.23-1.251.23-1.271.22-1. ... 27Chlorine Assay, %51-5350-5450-54Viscosity ( 50 οC ) , mPa· s150-250≤300-Refractive Index1.510- ...