Most common nitrites (NO2-) (like NaNO2, used as food
preservative) are inorganic compounds. However, some common
important organic nitrites include Methyl nitrite and Ethyl
nitrite.
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It is a cought syrup with opium (camphorated opium tincture,
glycyrrhiza fluid extract and antimony potassium tartrate +:6 ethyl
nitrite spirit). It is sell in 7-11 in Bangkok.