 The mighty business empire Tennant founded and the immense wealth generated allowed many of his descendants to marry into the aristocracy, his grandson Charles Clow Tennant (1823–1906) becoming 1st baronet.The chemical business founded by Tennant became known as the United Alkali Company Ltd. and eventually merged with others in 1926 to form the chemical giant Imperial Chemical Industries.The chemical works at Springburn closed in 1964.