The US has said Russia used a chemical weapon to try to assassinate ex-spy Sergei Skripal in Britain, and it is to impose new sanctions.
The State Department said the sanctions will be imposed on Russia because it used a chemical weapon in violation of international law.
Former Russian spy Sergei Skripal and his daughter were poisoned by Novichok, a military-grade nerve agent, in Salisbury in March.
Britain has accused Russia of being behind the attack, which the Kremlin vehemently denies.
Since the March attack, two other British nationals with no ties to Russia have been poisoned by the substance.
Following a 15-day congressional notification period, the sanctions will take effect on or around August 22, according to a statement from the State Department.