DefinitionMercuric chloride is a very poisonous form of Mercury. It is a type of mercury salt. There are different types of mercury poisonings. This article discusses poisoning from swallowing mercuric chloride.See also:Button battery poisoningDry cell battery poisoningMercuric oxide poisoningMercury poisoning (general overview)This is for information only and not for use in the treatment or management of an actual poison exposure. If you have an exposure, you should call your local emergency number (such as 911) or the National Poison Control Center at 1-800-222-1222.Poisonous IngredientMercuric chlorideWhere FoundMercuric chloride may be found in some:AntisepticsDry cell batteriesNote: This list may not be all inclusive.SymptomsAbdominal pain(severe)Breathing difficulty - severeDecreased