They also react with carbon dioxide and carbon tetrachloride, so that normal fire extinguishers are counterproductive when used on alkali metal fires.
ðeɪ ˈɔːlsoʊ ɹɪˈækt wɪð kˈɑːɹbən daɪˈɑːksaɪd ænd kˈɑːɹbən tˈɛtɹɐklˌoːɹaɪd, sˌoʊ ðæt nˈoːɹməl fˈaɪɚɹ ɛkstˈɪŋɡwɪʃɚz ɑːɹ kˌaʊntɚpɹədˈʌktɪv wɛn jˈuːzd ˌɔn ˈælkəlˌaɪ mˈɛɾəl fˈaɪɚz.