rikkivedynä

I want to write a precise wiki-style article, but I need to confirm what you mean by "rikkivedynä." The Finnish term can refer to different concepts in different contexts, and I don’t want to present incorrect information.

Could you specify which sense you have in mind?

- Do you mean hydrogen sulfide (H2S), sometimes described in Finnish as a sulfur hydride?

- Or a specific device, concept, or usage in a particular field (for example chemistry, industry, or folklore)?

- Or is it a regional or historical term with a particular definition?

If you can indicate the intended meaning, I’ll draft a neutral, concise article in plain text (under 300 words) in a wiki style.