May 21 (Reuters) - Singapore's government is aiming to raise up to $1.9 billion in a 30-year green bond, according to a term sheet viewed by Reuters.

The long-dated bond has an initial price guidance of about 3.46%, the term sheet showed.

The Monetary Authority of Singapore, which is issuing the bond of behalf of Singapore's government, did not immediately respond to a request for comment from Reuters.

The 30-year bond will raise between S$2.1 billion and S$2.5 billion ($1.56 billion-$1.9 billion), according to the term sheet.

Singapore last year raised S$700 million ($519.56 million) in a 50-year green bond which was the city's first green bond issuance. Proceeds from that deal were used to fund infrastructure investments, local media reported at the time.

Money raised from the 30-year bond will be used on projects covered under the city's green investment framework, the term sheet said.

The deal is being led by Citigroup, DBS Bank, HSBC, Standard Chartered Bank and United Overseas Bank (UOB). ($1 = 1.3473 Singapore dollars) (Reporting by Scott Murdoch and Yantoultra Ngui; Editing by Muralikumar Anantharaman and Subhranshu Sahu)