EXHIBIT 21 LIST OF SUBSIDIARIES Subsidiaries of Ashland Inc. ("AI") at October 1, 1998, included the companies listed below. Ashland has numerous unconsolidated affiliates, which are primarily accounted for on the equity method, and majority-owned consolidated subsidiaries in addition to the companies listed below. Such affiliates and subsidiaries are not listed below since they would not constitute a significant subsidiary considered in the aggregate as a single entity. Jurisdiction of Immediate Company Incorporation Parent* APAC-Alabama, Inc.................................................... Delaware AHI APAC-Arkansas, Inc................................................... Delaware AHI APAC-Carolina, Inc................................................... Delaware AHI APAC-Florida, Inc.................................................... Delaware AHI APAC-Georgia, Inc.................................................... Georgia AHI APAC Holdings, Inc. ("AHI").......................................... Delaware AI APAC, Inc............................................................ Delaware AHI APAC-Kansas, Inc..................................................... Delaware AHI APAC-Mississippi, Inc................................................ Delaware AHI APAC-Missouri, Inc................................................... Delaware AHI APAC-Oklahoma, Inc................................................... Delaware AHI APAC-Tennessee, Inc.................................................. Delaware AHI APAC-Texas, Inc...................................................... Delaware AHI APAC-Virginia, Inc................................................... Delaware AHI Arch Coal, Inc....................................................... Delaware AI 55% Ashland Canada Inc................................................... Ontario, Canada AIHI Ashland Chemical Hispania, S.A....................................... Spain AI Ashland France S.A................................................... France AIHI 85% - AI 15% Ashland International Holdings , Inc. ("AIHI")....................... Delaware AI Ashland Italia S.p.A................................................. Italy AIHI 43.50% - AI 56.50% Ashland Nederland B.V................................................ Netherlands AIHI Ashland UK Limited................................................... United Kingdom AIHI Ash Property, Inc.................................................... Ohio AI Ashmont Insurance Company, Inc. ("AIC").............................. Vermont AI Bluegrass Insurance Company Limited.................................. Bermuda AIC Marathon Ashland Petroleum LLC....................................... Delaware AI 38% Valvoline (Australia) Pty. Ltd....................................... Australia AIHI Vecom International B.V.............................................. Netherlands AIHI - --------------- *100% of the voting securities are owned by the immediate parent except as otherwise indicated.