Carbogen is

Dear Ankit Maheshwary,

Carbogen, also called Meduna's Mixture after its inventor Ladislal Meduna is a mixture of carbon dioxide and oxygen gas. Meduna's original formula was 30% CO₂ and 70% oxygen, but the term carbogen can refer to any mixture of these two gases, from 1.5% to 50% CO₂.

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