"Very good schemes have been devised to endorse investors in the petrochemical sector for Iran to see a giant leap in its petrochemical industry," Abbas Shari-Moqaddam, who is also deputy petroleum minister in petrochemical affairs.
"We invite all Iranian and foreign investors to step in and fund petrochemical projects," the official added.
He said many leading countries in the petrochemical industry are prepared to return to Iran given the promising political outlook by the sanctions relief.
"We are prepared to endorse investors in all the levels of petrochemical development projects," said the official.
Iran and the P5+1 are stuck in intensive talks over the former's nuclear program and lifting of sanctions on Tehran.
The two sides were supposed to conclude the talks by June 30, but have announced they will need some more days for the talks to continue.