[hammock]

>Krokodile (russian battery-acid-heroin)

I had to look up how it's made after you said that. What I found:

The simple and cheap domestic production process involves boiling 80-400mg of codeine with a diluting agent (mostly paint thinner that may contain lead, zinc or ferrous agents), gasoline, hydrochloric acid, iodine, and red phosphorous (which is scraped from the striking surfaces on matchboxes). In this process, desomorphine is generated from codeine (3-methylmorphine) via two intermediate steps (alpha-chlorocodide and desocodeine). The process takes 10-45 minutes. The final product is a suspension that contains desomorphine as the psychoactive core, along with all other agents involved in the production process.

[debo_]

Krokodile was a common catch-all slang word for drugs of unknown origin when I was a teenager.

[Obscurity4340]

> chlorocodide

This really is evocative of "crocodile", very interesting coincidence between that and the skin damage caused by iv use of the drug