Changes attribution in paragraph 2, adds details, remark in paragraphs 4,9

By Marcela Ayres and Bernardo Caram

BRASILIA, Nov 6 (Reuters) - Brazil raised $2.25 billion on Thursday in a new dollar bond sale, its fourth international market operation this year, including sustainable notes as it hosts world leaders for the United Nations climate summit.

In a statement, Brazil's Treasury said it sold $1.5 billion in new sustainable bonds due in 2033 and an additional $750 million through a retap of its 10-year benchmark bond.

The values were first reported by fixed-income news service IFR.

The Treasury added the 8-year bonds were issued with a yield of 5.75%, while the bonds due in 2035 have a 6.2% yield.

The offering marks Brazil's busiest year for external bond sales since 2010, when it also conducted four international issuances.

The Treasury said the new sustainable bonds underscore the government's commitment to sustainability amid rising demand from foreign investors.

The deal, launched on the eve of the COP30 conference in the Amazonian city of Belem, is Brazil's third sustainable bond issuance, following its debut in late 2023.

Brazil has already raised $8.5 billion this year through traditional sovereign bond sales in February, June and September.

"This issue attracted significant interest from investors, with a peak of more than 150 participants in the order book. Demand exceeded the volume issued by about three times," it said.

The government said the issuance also aims to boost liquidity along the sovereign dollar yield curve, provide a benchmark for corporate issuers and help pre-finance upcoming foreign debt maturities.

Citibank, Deutsche Bank and Goldman Sachs led the transaction.

(Reporting by Marcela Ayres and Bernardo Caram; Editing by Aida Pelaez-Fernandez and Aurora Ellis)

((Isabel.Teles@thomsonreuters.com;))