The first package of sanctions, announced by Washington earlier in August, include, in particular, the ban on supplies of dual-purpose electronic devices and components to Russia.
The US State Department and the Treasury have not responded to Sputnik's request to specify the date for the sanctions' introduction.
On August 8, the US administration announced a new round of sanctions against Russia due to its alleged use of chemical weapons in the poisoning of the Skripals in the UK city of Salisbury in March.
READ MORE: Sanctions-Happy US Uninterested in Actual Evidence in Skripal Case
Russia has repeatedly denied involvement in the Skripals case, stressing that London has neither provided evidence nor cooperated with Moscow in investigating the incident.