Application carbon black feed stock cbfs is the heavy hydrocarbon mix mostly c9 to c15 fraction and higher bottom product of naphtha cracker unit. Cbfs is the key raw ingredient employed in produce carbon black. Carbon black feed stock cbfs is primarily used for manufacture of carbon black, Cbfs may serve as a fuel, Particularly fro boiler operations and together with other fuels such as f. O. /lshs and other similar fuels within the same category category . Cbfs in the base ingredient for manufacture of carbon black, Designed for utilization in by the tyre industry. A small portion of This solution is frequently employed by processors to make various downstream chemicals like white oil, Agarbatti oil etc. This product is also used for manufacture of rubber process oils. There are two distinct categories of cbfs viz. High bmci type and general type. Bmci bureau of mines co, Relation index effectively measures the degree yield of carbon black. The higher the number, The better the yield of carbon black. Sulphur content in cbfs reduces the effect of bmci value. Cbfs carbon black feed stock is produced by thermal cracking of naptha at reliance hazira plant. Safekeeping and transportation cbfs may be kept in storage in mild steel tankers / tanks and requires class c petroleum storage license.