George William Ingle, 88, a chemist with Monsanto Co. who later worked for a chemical trade association in Washington, died of pneumonia July 6 at a nursing home in Hampden, Mass., where he lived.

Mr. Ingle worked for Monsanto from 1940 to 1974. After working for 28 years in Massachusetts, where he was director of the company's color laboratory in plastics, he was transferred to Washington in 1968 as manager of the technical liaison group.

He joined what is now the American Chemistry Council and was director of international affairs until his retirement in 1985.

He was a former resident of McLean and a member of Immanuel Presbyterian Church in McLean. He was a member of the Phi Beta Kappa Society and the Cosmos Club. He moved back to Massachusetts in 1987.

Mr. Ingle was born in Lynbrook, N.Y. He graduated from Colgate University in Hamilton, N.Y., and later received specialized training at the Institute of Paper Chemistry in Appleton, Wis.

Survivors include his wife of 58 years, Jeannette Ingle of Hampden; four children, Grant M. Ingle of Conway, Mass., William T. Ingle of Magnolia, Mass., Susan Ingle Owen of Falls Church and Jeanne B. Ingle of Hampden; a brother; and three grandchildren.