PARIS, Aug 30 (Reuters) - France will vote against renewing the European licence for weedkiller glyphosate, an official at the environment ministry said, adding to uncertainty over the future of widely-used products such as Monsanto's Roundup in the European Union.
Concerns over glyphosate's risk to human health have prompted investigations by U.S. congressional committees and delayed a relicensing decision in the EU.
"France will vote against the re-authorisation of glyphosate due to the doubts that remain about its dangerousness," a ministry official said.
The European Commission, the EU executive, has proposed extending approval for glyphosate by 10 years after the European Chemical Agency (ECHA) said in a study in March it should not be classified as a cancer-causing substance.
A vote on whether to renew the licence is due on Oct. 4, the French official said. A qualified majority of member states is needed for the renewal to go ahead.
In previous votes, France and Germany have abstained, leading the Commission to extend the licence by 18 months at the end of June 2016 to give the ECHA time to study the chemical further.
French farmers decried the decision and said it would mean the end of the use of glyphosate.
"The truth is that as long as alternative solutions are not available, the removal of glyphosate would sweep away the long-standing efforts of French farmers, their research and development tools," France's largest farm union FNSEA said in a statement. (Reporting by Simon Carraud, Writing by Sybille de La Hamaide; Editing by Mark Potter)