HYDROGEN SULFIDE (10 PPM - 1000 PPM) IN AIR

SECTION 2: Hazards identification

EMERGENCY OVERVIEW This product is a colorless gas, which has a rotten-egg odor. The odor cannot be relied on as an adequate warning to the presence of this product, because olfactory fatigue occurs after over-exposure to Hydrogen Sulfide. Over-exposure to this gas can cause skin or eye irritation, nausea, dizziness, headaches, collapse, unconsciousness, coma, and death. Additionally, releases of this product may produce oxygen-deficient atmospheres and may cause asphyxiation.

Principle Routes of Exposure

Skin Contact Skin Absorption Eye Contact Inhalation Ingestion Yes No Yes No

Potential health effects

Exposure Limits Irritant Sensitization Reproductive Hazard Mutagen Yes No Yes Carcinogenicity --NTP No IARC No OSHA No EYE EFFECTS: Contact may cause eye irritation with associated redness, swelling, and tears. 1 SKIN EFFECTS: Contact may cause skin irritation. INGESTION EFFECTS: Ingestion unlikely. Gas at room temperature. INHALATION EFFECTS: Over-exposure to Hydrogen Sulfide can cause dizziness, headache, and nausea. Over-exposure to this gas could result in respiratory arrest, coma, or unconsciousness. Continuous inhalation of low concentrations of Hydrogen Sulfide may cause olfactory fatigue, so that the odor is no longer an effective warning to the presence of this gas. At 0.3 ppm to 30 ppm the odor is unpleasant. At 50 ppm eye irritation occurs and dryness of the nose and throat. At 100- 150 ppm a temporary loss of smell occurs. Exposures of 200- 250 ppm for more than 4 hours can cause death.

Medical Conditions Generally Aggravated by Exposure

Individuals with impaired pulmonary function may be at increased risk form exposure. NFPA HAZARD CODES HMIS HAZARD CODES RATING SYSTEM Health: 3 Health: 3 0= No Hazard Flammability: 0 Flammability: 0 1= Slight Hazard Reactivity: 0 Reactivity: 0 2= Moderate Hazard 3= Serious Hazard 4= Severe Hazard