He made his senior debut for Ireland in January 1974 against France at Parc des Princes and helped the men in green win the Five Nations Championship that year.
His only Test try came in a 22-15 home victory over Scotland in February 1980.
Keane was regarded as one of Irish rugby's great characters and in 1984 he became only the third Irish forward to win 50 international caps, after Willie John McBride and Fergus Slattery.
Holding a masters degree in dairy science, he worked for many years in the Irish Department of Agriculture, and released his autobiography, 'Rucks, Mauls and Gaelic Football', in 2005.
He is survived by his wife Anne and daughters, Sarah and Anne Marie.
"Quite simply, Irish rugby has lost one of its most genuine characters and legends of the game," said Irish Rugby Football Union president Caleb Powell.
"Moss had ability on the field that no-one could doubt from his record at club, provincial and international level.
"Lansdowne, Munster, Ireland and the British and Irish Lions all benefited from his presence and ensured that his reputation will live long in the memories of not only Irish rugby, but world rugby."
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