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hydrogen sulfide noun

  /ˈhaɪdɹədʒ(ə)n ˈsʌlfaɪd/ , /ˈhaɪdɹədʒən ˈsʌlfaɪd/
  • (inorganic compound) A toxic gas, H2S, smelling like rotten eggs and used in analytical chemistry and industry.
 Schwefelwasserstoff
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