Is Vial of Poison legal in Standard, Modern, and Commander?

Vial of Poison is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Vial of Poison

Q: What type of card is Vial of Poison?

Vial of Poison is an Artifact. Its oracle text reads: "{1}, Sacrifice this artifact: Target creature gains deathtouch until end of turn. (Any amount of damage it deals to a creature is enough to destroy it.) *There are worse ways to die, but not many.*"