A State Department official said the sanctions could have a significant impact on trade with Russian Federation.
The surprise measures were announced by the State Department, which said that the Kremlin "has used chemical or biological weapons in violation of worldwide law or has used lethal chemical or biological weapons against its own nationals".
The official said a second batch of "more draconian" sanctions would be imposed after 90 days unless Russian Federation gives "reliable assurances" that it will no longer use chemical weapons and allow on-site inspections by the United Nations or other worldwide observer groups.
China continues 'fair and lawful' business in Iran, despite US sanctions
Trump tweeted on Tuesday: "These are the most biting sanctions ever imposed, and in November they ratchet up to yet another level".
The U.S. announced new sanctions on Russia Wednesday, saying it's made a final determination that Vladimir Putin's government was responsible for the March 4 nerve-agent attack on former double agent Sergei Skripal and his daughter in the United Kingdom.
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.
They were seriously ill but later made a full recovery after spending several weeks in hospital.
They were found in a serious condition on a bench in The Maltings shopping centre, and the discovery of the substance sparked a city-wide investigation with police having to cordon off large areas, including where they had eaten dinner that evening.
Sunita Williams among 9 astronauts to fly into space from United States soil
Doug Hurley - Marine Corps Colonel, piloted the Endeavor for STS-127 and the Atlantis for STS-135, the program's last mission. Since then, they have been in a race to see which company would fly first in what's become a sort of modern-day space race.
President Trump remains at his Bedminster golf club and had no public events on Wednesday.
Two more people - Dawn Sturgess and Charlie Rowley - were subsequently treated for exposure to novichok after Ms Sturgess reportedly picked up a discarded perfume bottle thought to have contained the agent.
In late March, Trump ordered 60 more Russian diplomats expelled from the United States as part of a global response to the attack - a response that included similar expulsions of diplomats from other nations checking Russia.
Rowley and Sturgess were hospitalised after being exposed to the deadly nerve agent June 30.
Snap continues to pay for Snapchat's unpopular redesign
Snap, which has never had a profitable quarter, went public in March 2017 with a $17 (roughly Rs. 1,200) share price. Snapchat users spend 30 minutes per day on average using the app, and generated over 3 billion snaps per day.