Contents

• 0.5 ppm – 1 st Alarm, amber flashing light;
• 1.0 ppm – 2 nd Alarm, red flashing light.
• Its vapor density is 2.5 (250% heavier than air), so its tendency is to stay closer to the ground
and in low lying areas;
• Precautions for safe handling and storage include: Do not take internally; Avoid contact with
skin, eyes and clothing; Upon contact with skin or eyes, wash off with water; Do not breathe gas
or vapor. Store in a cool, dry well-ventilated place, and do not store at temperatures above
140°F;
• When working at a facility that uses chlorine, know in advance:
• The locations where chlorine is stored and used at the facility;
• The facility alarms for notification of a chlorine leak, and the thresholds at which those
alarms operate;
• The location(s) of wind socks at the facility, to determine the wind direction (always travel
perpendicular to the wind direction and avoid low-lying areas, to avoid contact with
leaking chlorine gas);
• The designated assembly area(s) at the facility for a head count in the event of a chlorine
leak.
• Signs, Symptoms and Effects of Acute Exposure:
• Inhaled – Toxic if inhaled. Inhalation of this material is irritating to the nose, mouth, throat
and lungs. It may cause inflammation to the respiratory tract with the production of lung
edema, which can result in shortness of breath, wheezing, choking chest pain, and
impairment of lung function;
• Eyes – Irritation can occur following eye exposure to the gas with redness, pain, blurred
vision, and tearing. Contact with liquid chlorine may cause burns with impairment of
vision and corneal damage;
• Skin – Dermal exposure can cause irritation characterized by redness, swelling and scab
formation. Contact with liquid chlorine may cause burns with prolonged contact causing
destruction of the dermis with impairment of the skin at site of contact to regenerate;
• Ingestion – Ingestion is not a major route of exposure because chlorine is a gas at room
temperature (see the MSDS for specific effects).
• First aid for exposure to chlorine includes:
• Inhalation – Move person to fresh air; If person is not breathing, call 911 or local ambulance,
then give artificial respiration, preferable by mouth-to-mouth, if possible; Call injury
management number for treatment advice (800) 756-1130);
• Eyes – Hold eyes open and rinse slowly and gently with water for 15-20 minutes; Remove
contact lenses, if present, after the first 5 minutes, then continue rinsing eyes; Call injury
management number for treatment advice (800) 756-1130);
• Skin – Take off contaminated clothing; Rinse skin immediately with plenty of water for 15-
20 minutes; Call injury management number for treatment advice (800) 756-1130);
• Ingestion – Call a poison control center (800-222-1222) immediately for treatment advice
(then the injury management number to direct to nearest medical care (800) 756-1130).
• There are respirators available for emergency use for escaping areas where a chlorine leak has
occurred. Their use is voluntary. However, if they are used:
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