Air pollution

Ozone

Properties of ozone is described below

PHYSICAL STATE; APPEARANCE:
COLOURLESS OR BLUISH GAS , WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:
The gas is heavier than air.

CHEMICAL DANGERS:
The substance decomposes on warming producing oxygen , which increases fire hazard. The substance is a strong oxidant and reacts violently with combustible and reducing materials. Reacts with alkenes, aromatics such as aniline, and ethers, bromine, nitrogen compounds and rubber producing shock-sensitive compounds. Attacks metals except gold and platinum.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (light work) 0.1 ppm as TWA; TLV: (moderate work) 0.08 ppm as TWA; TLV: (heavy work) 0.05 ppm as TWA; A4; (ACGIH 2004).
OSHA PEL: TWA 0.1 ppm (0.2 mg/m³)
NIOSH REL: C 0.1 ppm (0.2 mg/m³)
NIOSH IDLH: 5 ppm

ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.

INHALATION RISK:
A harmful concentration of this gas in the air will be reached very quickly on loss of containment.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes and the respiratory tract. Inhalation of the gas may cause lung oedema (see Notes). Inhalation of the gas may cause asthmatic reactions (see Notes). The liquid may cause frostbite. The substance may cause effects on the central nervous system , resulting in headache and impaired vigilance and performance.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Lungs may be affected by repeated or prolonged exposure to the gas.

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For more information see website:
http://www.cdc.gov/niosh/ipcsneng/neng0068.html