Dr. William H. Bachrach 76, a supervisory medical officer in charge of gastroenterological drug products at the Food and Drug Administration, died of cardiac arrest Sept. 20 at his home in Rockville.

Dr. Bachrach had worked at the FDA since 1981 and also had worked there from 1974 to 1976. He was on the faculty at George Washington University medical school. From 1976 to 1981 he was chief of gastroenterology at the Baylor College of Medicine in Houston.

Before 1974 he had a private practice in gastroenterology in Los Angeles and was on the faculty at the University of California at Los Angeles medical school.

He was born in Nova Scotia. He graduated from Northwestern University, where he also received his medical degree. During World War II he served in the Army Air Forces.

His first wife, Gertrude Bachrach, died in 1962.

Survivors include his wife, Ann Bachrach of Rockville; three children by his first marriage, Osher M. Bachrach of Norman, Okla., Jonathan David Bachrach of New York City and Judith Bachrach of Los Angeles; a daughter by his second marriage, Miriam A. Bachrach of Franklin Park, N.J., and five grandchildren.

FRED McWHORTER JONES,

73, a retired housing official with the Army Corps of Engineers, died of cancer Sept. 19 at Northern Virginia Doctors Hospital.

Mr. Jones, who lived in Falls Church, was born in Meadow Bluff, W.Va. He attended Marshall College and Bridgewater College and he moved to the Washington area in the 1930s.

He began his career with the Corps of Engineers in the late 1930s and retired in 1976 with 38 years of service.

He was a specialist who arranged housing for troops and families at Army posts in this country and around the world.

Mr. Jones was a member of the Army Real Estate Association.

His first wife, Mabel Jones, died about 1962.

Survivors include his wife, Colleen Jones of Falls Church; three children by his first marriage, William E. Jones of Poquoson, Va., Patricia Hines of Arlington and Shirley Strong of Palm Bay, Fla.; two stepsons, Joseph M. Nowland of South Miami, Fla., and Robert C. Nowland of Herndon; four stepdaughters, Judith A. Miller, also of Herndon, Kathleen M. Ryan of Chardon, Ohio, Suzanne Hibbard of Lewiston, N.Y, and Mary C. Nowland of Vienna; 18 grandchildren, and four great-grandchildren.

WILFRED W. (BILL) KOHN,

72, who worked for the Arlington Electronic Wholesalers for 15 years before retiring in 1985 as general manager, died of emphysema Sept. 17 at Northern Virginia Doctors Hospital. He lived in Arlington.

Mr. Kohn was a native of Nebraska and attended the University of Nebraska. He lived in Massachusetts, where he worked in the electronics industry, before moving here in the mid-1960s.

He was a sales representative with the old Washington Electronic Wholesalers before joining the Arlington company.

Survivors include his wife of 45 years, Elizabeth Maria Kohn of Arlington; two sons, Jeffrey, of Cheverly, and William M., of Fairfax; a daughter, Valerie Kohn of Washington; a sister, Esther Lucy of Iowa, and four grandchildren.

MARGARET ANN FORRENCE,

29, an accounts executive with Merrill Lynch Pierce Fenner & Smith Inc., the securities brokerage firm, died Sept. 21 at George Washington University Hospital of thromboembolic disease, a vascular disorder. She lived in Washington.

Miss Forrence was born in Belleville, N.J., and graduated from Cornell University.

In 1980 she moved to the Washington area and joined Merrill Lynch, where she worked until her death.

She had taught aerobics classes at the YMCA of Metropolitan Washington.

Survivors include her parents, Betsey and Leonard Forrence of Emmitsburg, Md.; three sisters, Jennifer Forrence of New Haven, Conn., Sharon Forrence of Washington, and Catherine Forrence of Baltimore; a brother, Michael Forrence of Sebastian, Fla., and a grandmother, Alice Johnson of Washington.