TEHRAN, Iran -- Iran's President Mahmoud Ahmadinejad said Tuesday the latest EU sanctions on the sale of Iranian oil are "the strongest" measures yet imposed on the country.
The embargo, which comes on top of a fresh round of U.S. sanctions targeting Iran's vital oil sector, is the latest move in the West's standoff with Iran over its disputed nuclear program.
In his first comments since the EU ban on the purchase of Iranian oil took effect Sunday, Ahmadinejad said "the sanctions imposed on our country are the strongest ones that have ever been applied against a country."
"Our enemies assume that they are able to corner Iran in a weak position with these sanctions," he said, according to state TV.
But he added that Iran should view the EU ban "as an opportunity to wean the country's budget off its dependence on oil revenues," saying that would "remove the weapon of oil from the enemy's hand forever."
Iran is the second largest OPEC oil producer, producing about 4 million barrels of oil a day. The country relies on oil exports for about 80 percent of its foreign revenues. However, a large portion of Iran's crude production is used domestically.
The EU embargo, combined with the fresh U.S. measures that prohibit the world's banks from completing oil transactions with Iranian banks, significantly ratchet up the pressure on an Iranian economy already squeezed by previous rounds of sanctions.
There are signs that the measures are taking a toll on Iran's already shaky economy. This week, Vice President Mohammad Reza Rahimi said authorities had stockpiled imported goods and hard currency to help cushion the blow to the economy.
The U.S. and EU imposed the sanctions to pressure Iran over its nuclear program, which Washington and its allies suspect is aimed at developing atomic weapons. Iran denies the allegations, and says its program is solely for peaceful purposes, such as producing energy and medical isotopes.
Iran's Foreign Ministry spokesman said the sanctions would not affect Iran's nuclear activities, but they might damage nuclear talks between Iran and the West.
"As long as they wrongly imagine that imposing illegal and illegitimate sanctions would make us back off on our rights and they can talk down to us in negotiations, such an attitude will definitely have a negative impact on the success of the talks," he said.
Low-level technical talks between Iran and the world powers opened Tuesday in Istanbul, Turkey. That follows three rounds of nuclear negotiations between Iran and six world powers that have failed to produce a breakthrough.
<em>In this Saturday, Nov. 12, 2011 photo, Iranian women and a man weave carpet in a workshop in Qom, 78 miles (125 kilometers) south of the capital Tehran, Iran. (AP Photo/Vahid Salemi)</em><br><br> Initial sanctions were imposed after Iranian students stormed the U.S. embassy and took diplomats hostage in 1979. Iranian products cannot be imported into the United States apart from small gifts, information material, food and some carpets.
<em>Former President Bill Clinton addresses the audience during the opening night dinner of the World Summit of Nobel Peace Laureates at the Field Museum Monday, April 23, 2012, in Chicago. (AP Photo/Charles Rex Arbogast)</em><br><br> In 1995, President Bill Clinton issued executive orders preventing U.S. companies from investing in Iranian oil and gas and trading with Iran. The same year, Congress passed a law imposing sanctions on foreign companies investing more than $20 million a year in Iran's energy sector.
<em>In this Thursday, Oct. 30, 2008 file photo, an Iranian money changer holds currency with Ayatollah Ruhollah Khomeini's image in Tehran, Iran. (AP Photo/Hasan Sarbakhshian, File)</em><br><br> In October 2007, Washington imposed sanctions on three Iranian banks and branded the Islamic Revolutionary Guards Corps a proliferater of weapons of mass destruction. The Treasury has since added numerous other Iranian banks to its blacklist. The Treasury has identified about 20 petroleum and petrochemical companies as being under Iranian government control, an action that put them off-limits to U.S. businesses under the trade embargo.
<em>This photo shows a branch of Iranian Bank Tejarat in Tehran on January 24, 2012 upon which the US Treasury announced sanctions claiming all of the Islamic Republic's major state-owned banks have now been subjected to punitive measures. (ATTA KENARE/AFP/Getty Images)</em><br><br> Congress approved tough new unilateral sanctions on June 24, 2010, aimed at squeezing Iran's energy and banking sectors. The new law imposed penalties on companies that supply Iran with refined petroleum products worth more than $5 million a year. It also effectively deprived foreign banks of access to the U.S. financial system if they did business with Iranian banks or the Revolutionary Guards.
<em>Oil workers gather by an oil well operated by Venezuela's state-owned oil company PDVSA in Morichal, Venezuela, on July 28, 2011. (RAMON SAHMKOW/AFP/Getty Images)</em><br><br> In May 2011, the United States announced new sanctions on Venezuela's state oil company, PDVSA, and six other smaller oil and shipping firms for trading with Iran in violation of the U.S. ban, prompting fury from Hugo Chavez's government.
<em>Members of Iran's paramilitary Basij militia parade in front of the former US embassy in Tehran on November 25, 2011 to mark the national Basij week. (ATTA KENARE/AFP/Getty Images)</em><br><br> On June 11, it announced new sanctions on the Revolutionary Guards, the Basij Resistance Force, and Iran's law enforcement forces. The sanctions froze any of the targets' assets under U.S. jurisdiction and barred U.S. persons and institutions from dealing with them.
<em>Secretary of State Hillary Clinton and Treasury Secretary Timothy Geithner (L) announce new sanctions against Iran at the State Department on November 21, 2011 in Washington, DC. (Photo by Mark Wilson/Getty Images)</em><br><br> On Nov. 21 the United States named Iran as an area of "primary money-laundering concern", a step designed to dissuade non-U.S. banks from dealing with it. The United States also blacklisted 11 entities suspected of aiding its nuclear programmes and expanded sanctions to target companies that aid its oil and petrochemical industries.
<em>US President Barack Obama (C) greets guests after speaking on nuclear security, touching on subjects from terrorism to Iran and North Korea, during a visit to Hankuk University of Foreign Studies in Seoul on March 26, 2012. (SAUL LOEB/AFP/Getty Images)</em><br><br> On Dec. 31, 2011, President Barack Obama signed into law a defense funding bill that imposed sanctions on financial institutions dealing with Iran's central bank, which is the main conduit for oil revenues. Sanctioned institutions would be frozen out of the U.S. financial markets.
<em>Hostesses stand in front of the construction site of the Saudi Basic Industries Corp. (SABIC) Technology Centre and Greater China Headquarters in Shanghai, China Friday, April 6, 2012. (AP Photo/Eugene Hoshiko)</em><br><br> On Jan. 13, 2012 the United States extended sanctions to Chinese state-run energy trader Zhuhai Zhenrong Corp, which it said was Iran's largest supplier of refined petroleum products. It also imposed sanctions on Singapore's Kuo Oil Pte Ltd and United Arab Emirates-based FAL Oil Company Ltd.
<em>Members of Iranian Revolutionary Guards attend a ceremony at the mausoleum of the late revolutionary founder Ayatollah Khomeini, commemorating 33rd anniversary of his return from exile after 14 years, and the 1979 Islamic Revolution which toppled pro-US Shah Mohammad Reza Pahlavi, just outside Tehran, Iran, Wednesday, Feb. 1, 2012. (AP Photo/Vahid Salemi)</em><br><br> The United States exempted Japan and 10 European Union nations from financial sanctions on March 20 because they had significantly cut purchases of Iranian oil, but Iran's top customers China and India remain at risk of such steps. On March 28 the Treasury set additional sanctions against Iranian engineering firms with ties to the Revolutionary Guards, as well as individuals and shipping companies with ties to the Islamic Republic of Iran Shipping Lines (IRISL).
<em>In this Sept. 27, 2000 file photo, an Iranian oil worker repairs a pipe at an oil refinery in Tehran. (AP Photo/Vahid Salemi, File)</em><br><br> On May 21 the Senate approved the latest tightening of sanctions on Iran's oil trade.
<em>In this Jan. 19, 2012 file photo, fishing boats are seen in front of oil tankers on the Persian Gulf waters, south of the Strait of Hormuz, offshore the town of Ras Al Khaimah in United Arab Emirates. (AP Photo/Kamran Jebreili)</em><br><br> On Aug. 12, 2010 the EU banned the creation of joint ventures with enterprises in Iran engaged in the oil and natural gas industries. Member states must prohibit the provision of insurance and re-insurance to the government of Iran. The import and export of arms and equipment that could contribute to uranium enrichment, or have a "dual use", is banned. The sanctions forbid the sale, supply or transfer of energy equipment and technology used by Iran for exploration and production or for refining or liquefying natural gas. The EU expects the effects of the sanctions to increase over time as existing parts wear out.
<em>EU foreign policy chief Catherine Ashton speaks during a media conference after a meeting of EU foreign ministers at the EU Council building in Brussels on Monday, Jan. 23, 2012. (AP Photo/Virginia Mayo)</em><br><br> In May 2011, EU foreign ministers added 100 new entities to a list of companies and people affected, including those owned or controlled by IRISL. Last October, the EU imposed sanctions on 29 people, extending the list targeting individuals associated with human rights violations to 61. On Dec. 1, the EU added 180 Iranians and entities to a sanctions blacklist that imposes asset freezes and travel bans on those involved in the nuclear program.
<em>In this March 13, 2008 file photo, gold coins and bars are shown at California Numismatic Investments in Inglewood, Calif. (AP Photo/Nick Ut, File)</em><br><br> On Jan. 23, 2012 the EU placed an immediate ban on all new contracts to import, purchase or transport Iranian crude oil and petroleum products. EU countries with existing contracts to buy oil and petroleum products were allowed to honor them until July 1. The EU also agreed to freeze the assets of Iran's central bank and ban trade in gold and other precious metals with the bank and state bodies.
<em>British Ambassador to the UN Mark Lyall Grant (C) speaks during a vote on broader military and financial sanctions on Iran over its suspect nuclear program during a UN Security Council at the UN headquarters June 9, 2010 in New York. (EMMANUEL DUNAND/AFP/Getty Images)</em><br><br> The Security Council has imposed four sets of sanctions on Iran, in December 2006, March 2007, March 2008 and June 2010. The first covered sensitive nuclear materials and froze the assets of Iranian individuals and companies linked with the nuclear program.
<em>A military truck carries a Sejil rocket as it is paraded during the annual Army Day military parade in Tehran on April 17, 2012. (ATTA KENARE/AFP/Getty Images)</em><br><br> The second included new arms and financial sanctions. It extended an asset freeze to 28 more groups, companies and individuals engaged in or supporting sensitive nuclear work or the development of ballistic missiles.
<em>Iranian President Mahmoud Ahmadinejad adjusts his goggles as he tours an exhibition on laser technology in Tehran on February 7, 2010. (ATTA KENARE/AFP/Getty Images)</em><br><br> The third, in 2008, increased travel and financial curbs on individuals and companies. It expanded a partial ban on trade in items with both civilian and military uses to cover sales of all such technology to Iran.
<em>A street money exchanger, puts US dollars in a plastic bag, in Ferdowsi St. in downtown Tehran, Iran, Wednesday, Dec. 21, 2011. (AP Photo/Vahid Salemi)</em><br><br> A Security Council resolution passed on June 9, 2010, called for measures against new Iranian banks abroad if a connection to the nuclear or missile programmes was suspected.
<em>Soldiers of the Iranian Revolutionary Guard walk past a satirical drawing of Statue of Liberty on the wall of the former US Embassy in Tehran, Iran, Friday, Nov. 25, 2011. (AP Photo/Vahid Salemi)</em><br><br> It expanded a U.N. arms embargo against Tehran and blacklisted three firms controlled by IRISL and 15 belonging to the Revolutionary Guards. The resolution called for the setting up of a cargo inspection regime.