0000950131-99-004854 10-Q 3 19990630 19990812 STEPAN CO 0000094049 2840 361823834 DE 1231 10-Q 34 001-04462 99685684 EDENS & WINNETKA RDS NORTHFIELD IL 60093 7084467500 EDENS & WINNETKA ROAD NORTHFIELD IL 60093 STEPAN CHEMICAL CO /DE/ 19840108 10-Q 1 000095013199004854-001-seq1-10-q.txt FORM 10-Q EX-3.A.1 2 000095013199004854-002-seq2-ex-3-a-1.txt AMENDMENT TO ARTICLES OF INCORPORATION OF STEPAN EX-27 3 000095013199004854-003-seq3-ex-27.txt FINANCIAL DATA SCHEDULE