Symptoms and Signs of Caustic Ingestion Initial symptoms of caustic ingestion include drooling and dysphagia. In severe cases, pain, vomiting, and sometimes bleeding develop immediately in the mouth, throat, chest, or abdomen. Airway burns may cause coughing, tachypnea, or stridor.

It is often used in the petroleum and food industries. The GHS symbol for caustic or corrosive chemicals shows test tubes pouring liquid onto a flat surface and also onto a human hand. Both are being eaten away by the liquid, indicating the dangerous chemical action.

A Danger Caustic Sign is a hazard warning message type of chemical information sign which is used around areas where caustic substances are present to warn others of the dangers posed from the caustics and Danger Caustic Signage conveys the message "Danger caustic" which means to provide a danger message to people about the area which has caustic substances present.

A Warning Caustic Sign is a hazard warning message type of sign which is used for being displayed around areas where people need to be warned about the dangers posed from and caustic hazards and conveys the message "Warning Caustic"