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FORMALDEHYDEICSC: 0275
Methyl aldehyde
Methylene oxide
Methanal
June 2012
CAS #: 50-00-0
UN #: (see Notes)
EC Number: 200-001-8

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Extremely flammable.  Gas/air mixtures are explosive. Risk of explosion on contact with strong oxidants, strong acids or strong bases.  NO open flames, NO sparks and NO smoking.  Closed system, ventilation, explosion-proof electrical equipment and lighting. NO contact with incompatible materials: See Chemical Dangers  Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out. In other cases extinguish with powder, carbon dioxide.  In case of fire: keep drums, etc., cool by spraying with water. 

 AVOID ALL CONTACT!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Sore throat. Burning sensation behind the breastbone. Headache. Shortness of breath.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer immediately for medical attention. 
Skin Redness.  Protective gloves.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Seek medical attention if you feel unwell. 
Eyes Watering of the eyes. Redness. Pain. Blurred vision.  Wear safety goggles or eye protection in combination with breathing protection.  Rinse with plenty of water (remove contact lenses if easily possible). Refer immediately for medical attention. 
Ingestion      

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Personal protection: gas-tight chemical protection suit including self-contained breathing apparatus. Remove all ignition sources. Turn off gas at source if possible. Remove gas with fine water spray. 

According to UN GHS Criteria

flam;flameskull;toxiccancer;health haz
DANGER
Extremely flammable gas
Fatal if inhaled
Causes serious eye irritation
May cause cancer if inhaled
May cause an allergic skin reaction
May cause respiratory irritation 

Transportation
UN Classification
 

STORAGE
Fireproof. Cool. Separated from incompatible materials. See Chemical Dangers. 
PACKAGING
 
FORMALDEHYDE ICSC: 0275
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS GAS WITH PUNGENT ODOUR. 

Physical dangers
The gas mixes well with air, explosive mixtures are easily formed. 

Chemical dangers
The substance polymerizes in contact with alkalies and if dissolved in water. Upon heating, toxic fumes are formed. Reacts violently with strong oxidants, strong acids and strong bases. This generates explosion hazard. 

Formula: H2CO
Molecular mass: 30.0
Boiling point: -20°C
Melting point: -92°C
Relative density (water = 1): 0.8
Solubility in water: very good
Relative vapour density (air = 1): 1.08
Auto-ignition temperature: 430°C
Explosive limits, vol% in air: 7-73
Octanol/water partition coefficient as log Pow: 0,35  


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation. 

Effects of short-term exposure
The substance is severely irritating to the eyes and respiratory tract. Inhalation of high concentrations may cause lung oedema, but only after initial corrosive effects on the eyes and the upper respiratory tract have become manifest. 

Inhalation risk
A harmful concentration of this gas in the air will be reached very quickly on loss of containment. 

Effects of long-term or repeated exposure
Repeated or chronic inhalation of the vapour may cause chronic inflammation of the upper respiratory tract. Repeated or prolonged contact may cause skin sensitization. This substance is carcinogenic to humans. 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 0.1 ppm as TWA; 0.3 ppm as STEL; (SEN); A1 (confirmed human carcinogen).
MAK: 0.37 mg/m3, 0.3 ppm; peak limitation category: I(2); carcinogen category: 4; pregnancy risk group: C; germ cell mutagen group: 5; sensitization of skin (SH) 

ENVIRONMENT
 

NOTES
Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered.
No UN number is presented because formaldehyde is not transported as a gas. It is usually transported as a solution.
See ICSC 0695. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: T; R: 23/24/25-34-40-43; S: (1/2)-26-36/37/39-45-51 

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    See Also:
       Toxicological Abbreviations
       Formaldehyde (EHC 89, 1989)
       Formaldehyde (HSG 57, 1991)
       Formaldehyde  (SIDS)
       Formaldehyde (CICADS 40, 2002)
       Formaldehyde (IARC Summary & Evaluation, Volume 62, 1995)
       Formaldehyde (IARC Summary & Evaluation, Volume 88, 2006)