(Bloomberg) – Hanwha Total Petrochemical Co. bought alternative supply after a fire on board an Iranian oil tanker that was destined for the South Korean company.

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Crew members of the vessel were still missing following a collision in the East China Sea with another ship that's left it in danger of sinking.

The Sanchi is still ablaze and may explode after colliding on Saturday with the bulk carrier CF Crystal about 160 nautical miles off the coast of Shanghai, Chinese state media reported, with images showing the ship shrouded in thick black smoke. China, South Korea and the U.S. sent vessels and planes to search for Sanchi's missing crew — 30 Iranians and two Bangladeshis, the Associated Press reported.

Poisonous gases

One of the 32 missing sailors was found dead, Tasnim News Agency reported, citing Mohammad Rastad, the head of Iran's Ports and Maritime Organization. The ship was throwing off poisonous gases, hindering rescue efforts, Tasnim said, citing Sirous Kian-Ersi, managing director of National Iranian Tanker Co.

Sanchi was ferrying 1 million barrels of condensate — a hydrocarbon liquid that's used to make petrochemicals — to Daesan, according to a Hanwha Total spokesman. The firm plans to use its stockpiles as a replacement for the supply, and is considering whether to make additional purchases, he said, asking not to be identified because of internal policy.

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