Arrhenius is a lunar impact crater that is located just on the far side of the Moon, near the southwest limb.

To the south-southeast is the worn crater Blanchard, and De Roy lies further to the west.

This crater was named after Swedish chemist Svante Arrhenius by the IAU in 1970.

[1] The outer wall of Arrhenius has been somewhat worn and eroded due to a history of minor impacts, leaving the rim rounded and low.

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Arrhenius.