HELIUM

SECTION 2: Hazards identification

EMERGENCY OVERVIEW: Helium is a colorless, odorless gas. The main health hazard associated with releases of this gas is asphyxiation, by displacement of oxygen. SYMPTOMS OF OVER-EXPOSURE BY ROUTE OF EXPOSURE: The most significant route of over-exposure for Helium is by inhalation. INHALATION: High concentrations of this gas can cause an oxygen-deficient environment. Individuals breathing such an atmosphere may experience symptoms which include headaches, ringing in ears, dizziness, drowsiness, unconsciousness, nausea, vomiting, and depression of all the senses. Under some circumstances of over-exposure, death may occur. The following effects associated with various levels of oxygen are as follows: CONCENTRATION SYMPTOM OF EXPOSURE 12-16% Oxygen: Breathing and pulse rate increased, muscular coordination slightly disturbed. 10-14% Oxygen: Emotional upset, abnormal fatigue, disturbed respiration. 6-10% Oxygen: Nausea and vomiting, collapse or loss of consciousness. Below 6%: Convulsive movements, possible respiratory collapse, and death. WARNING The practice of intentionally inhaling helium for a voice altering effect is extremely dangerous and may result in serious injury or death.

Potential health effects

OR RISKS FROM EXPOSURE An Explanation in Lay Terms. Over-exposure to Helium may cause the following health effects: ACUTE: The most significant hazard associated with this gas is inhalation of oxygen-deficient atmospheres. Symptoms of oxygen deficiency include respiratory difficulty, ringing in ears, headaches, shortness of breath, wheezing, headache, dizziness, indigestion, nausea, and, at high concentrations, unconsciousness or death may occur. The skin of a victim of over-exposure may have a blue color. CHRONIC: There are currently no known adverse health effects associated with chronic exposure to this gas. TARGET ORGANS ACUTE Respiratory system CHRONIC: None known.