Air pollution

 Methanal

Properties of methanal is described below

PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID

PHYSICAL DANGERS:


CHEMICAL DANGERS:
Reacts with acids , alkali metals and strong oxidants .

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.3 ppm (Ceiling value); A2; SEN; (ACGIH 2004).
MAC: 0.3 ppm 0.37 mg/m³; Sh;
Peak limitation category: I(2); Carcinogen category: 4; Germ cell mutagen group: 5; Pregnancy risk group: C;
(DFG 2004).

ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, through the skin and by ingestion.

INHALATION RISK:
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is severely irritating to the eyes , the skin and is irritating to the respiratory tract .

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact may cause skin sensitization. Repeated or prolonged inhalation exposure may cause asthma-like symptoms. This substance is carcinogenic to humans.

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For more information see website: 
http://www.cdc.gov/niosh/ipcsneng/neng0695.html