According to the Russian government, their country officially complied with the terms of the Chemical Weapons Convention on September 27, 2017.
According to broadcasts from Russian State Media, Russian President Vladimir Putin destroyed the last of Russia's chemical weapons stockpile that were banned by the Chemical Weapons Convention on September 27, 2017, in a highly publicized and choreographed event.
The New York Times
President Vladimir V. Putin of Russia presided over the destruction of his country’s last declared chemical weapons on Wednesday
“We trust that Russia’s efforts on liquidating chemical weapons will serve as an example for other countries,” Putin concluded. He spoke as he hailed the “historic” closing of a chemical arms facility in Russia’s Udmurtia region—the last facility of its kind, according to Putin.
President Vladimir Putin said Russia was destroying its last supplies of chemical weapons on Wednesday, three years ahead of schedule, hailing the development as “an historic event”.
all independently published the story regarding the destruction of the last of the Russian military stockpile of chemical weapons.
The event was described as follows by the New York Times.
State television showed Mr. Putin ordering officials at a destruction center in the central Russian village of Kizner to dismantle the last shells containing lethal chemical agents. The green shells, each unscrewed by a machine in a sealed container, bore the words “Farewell, chemical weapons” painted in white in Russian.
Valery Kapashin, the head of the Russian agency responsible for the storage and destruction of chemical arms, told Mr. Putin by video link to the president’s country home outside Moscow: “Comrade commander-in-chief! The chemical weapons of the Russian Federation have now been entirely eliminated.”
The chemical weapons were destroyed as part of an international agreement between Russia and the United States. From the New York Times article above
Both Russia and the United States — which hold the world’s biggest stockpiles — were supposed to destroy all of their chemical weapons by 2012 under an international agreement, the Chemical Weapons Convention, that they each signed in 1993 and which went into force in 1997. The final deadline for the elimination of chemical weapons was initially set for 2007. But with neither of the two countries close to meeting that goal, the deadline was extended to 2012.
Neither Russia nor the United States met that new deadline either, although Mr. Putin boasted on Wednesday that Russia was three years ahead of a 2020 deadline it had set for itself.
The full text of the original agreement is available here.
A few things to note from the agreement, however.
Countries party to the agreement are self reporting, and not done by inspectors searching the country for weapons. If a country does not declare a chemical weapon cache to inspectors then they do not know about it.
Countries party to the agreement are allowed to manufacture small amounts of chemical weapons (100 grams) for "research, medical or pharmaceutical purposes"
According to some, new chemical agents are not banned under the agreement and are allowed to be produced by countries party to the agreement.