MOSCOW, Aug 22 (Reuters) - The Russian rouble was flat

against the dollar but strengthened against China's yuan on

Thursday in a market that remained thin, ahead of foreign

currency sales by exporting companies at August-end that are

expected to support the rouble.

By 0745 GMT, the rouble was flat at 91.50 to the

dollar, according to LSEG data.

Trading in major currencies shifted to the over-the-counter

(OTC) market, obscuring pricing data, after Western sanctions on

the Moscow Exchange and its clearing agent, the National

Clearing Centre, were introduced on June 12.

One-day rouble-dollar futures, which trade on the Moscow

Exchange and serve as guidance for the OTC market rates, were

down 0.11% at 89.87.

The central bank's official exchange rate, which it

calculates using OTC data, was set at 90.69 to the dollar.

According to an analysis of the OTC market, the rouble

strengthened by 0.4% to 12.06 against the Chinese yuan, which

has become the most traded foreign currency in Moscow.

It was down 0.1% at 102.11 against the euro,

according to LSEG data.

Brent crude oil, a global benchmark for Russia's

main export, was down 0.2% at $75.94 a barrel as investors

worried about the global demand outlook.

(Reporting by Gleb Bryanski; Editing by Janane Venkatraman

)