Iranian FM: Final Deal Will Decide Fate of Enriched Uranium — Dilution Only Option Inside Iran

The Iranian Red Line

Iranian Foreign Minister Abbas Araghchi has signaled a hardening of Tehran's negotiating position regarding its nuclear stockpile. In statements made on Wednesday, Araghchi clarified that the question of uranium enrichment and the existing stockpile of enriched materials is a matter for the "final agreement" and not for preliminary concessions. Crucially, he reiterated a long-standing Iranian red line: that any material enriched to 60%—a level technically close to weapons-grade—must remain within the country. If international regulators or negotiating partners require a reduction in the enrichment level, Araghchi insisted that the only path forward is to dilute the material domestically rather than shipping it abroad.

Context of the Nuclear Stockpile

This development comes at a critical juncture in regional diplomacy. According to reports reviewed by The Zioneer Intelligence Desk, the International Atomic Energy Agency (IAEA) estimated that Iran possessed approximately 440.9 kg of uranium enriched to 60% as of mid-2025. The fate of this material has been a central point of contention in talks involving the United States and Israel. While some prior reports suggested that a memorandum of understanding (MOU) might leave the resolution of the stockpile to a second-stage deal, Araghchi’s latest comments suggest that Iran is unwilling to entertain the physical removal of the material from its territory, a key demand often voiced by Western security officials.

Analysis of the Dilution Proposal

By insisting on dilution inside Iran, Tehran seeks to maintain physical control over its nuclear assets while offering a technical reversal of the enrichment process. From a security perspective, this presents a significant challenge for international inspectors. Dilution involves mixing highly enriched uranium with natural or depleted uranium to lower its concentration. However, if the material remains in Iran, the infrastructure to re-enrich it quickly—often referred to as "breakout capacity"—remains intact. This differs fundamentally from the removal of the material, which would physically strip the regime of its immediate path to a nuclear weapon.

Strategic Implications for Israel

For Israel, the insistence on domestic dilution is likely to be viewed with skepticism. Jerusalem has historically argued that any deal leaving the nuclear infrastructure and material within Iran fails to provide a permanent solution to the threat. As the diplomatic picture continues to develop, the focus will shift to whether the Trump administration and other global powers will accept domestic dilution as a sufficient safeguard or if they will continue to push for the total removal of the 60% stockpile. Araghchi's statement effectively places the ball back in the court of the international community, framing the nuclear stockpile as a final-stage bargaining chip rather than a prerequisite for de-escalation.