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TRIMETHYL BORATE
ICSC: 0593
Peer-Review Status: 08.06.2012 Validated
Methyl borate
Trimethoxyborine
Boric acid, trimethyl este 
CAS #: 121-43-7 RTECS #: ED5600000
UN #: 2416
EC #: 005-005-00-1
EINECS #: 204-468-9
    Formula: C3H9BO3 / B(OCH3)3
Molecular mass: 103.9

TYPES OF HAZARD
/ EXPOSURE
ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE-FIGHTING
FIRE Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames, NO sparks and NO smoking.  Use foam, powder, carbon dioxide. 
EXPLOSION Vapour/air mixtures are explosive.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling.  In case of fire: keep drums, etc., cool by spraying with water. NO direct contact with water. 
 
EXPOSURE      
Inhalation Cough. Sore throat.  Use ventilation.  Fresh air, rest. 
Skin Redness. Burning sensation.  Protective gloves.  Rinse skin with plenty of water or shower. 
Eyes Redness. Pain.  Wear safety goggles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Burning sensation. Abdominal pain. See Notes.  Do not eat, drink, or smoke during work.  Rinse mouth. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: filter respirator for organic vapours of low boiling point adapted to the airborne concentration of the substance. Collect leaking liquid in sealable containers. Do NOT wash away into sewer. Absorb remaining liquid in dry sand or inert absorbent. Then store and dispose of according to local regulations.  Airtight. 
EC Classification
Symbol: Xn; R: 10-21; S: (2)-23-25 
UN Classification
UN Hazard Class: 3; UN Pack Group: II 
GHS Classification
Signal: Danger
Highly flammable liquid and vapour
Harmful in contact with skin
May be harmful if swallowed
Causes eye irritation 
flam;flameexcl mark;warn

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H1; F3; R1.  Fireproof. Separated from strong oxidants and strong acids. Dry. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS LIQUID. 

Physical dangers
The vapour is heavier than air and may travel along the ground; distant ignition possible. 

Chemical dangers
Decomposes on burning. This produces toxic fumes including boron oxides. Reacts with oxidants. This generates fire and explosion hazard. Reacts with water, moist air and strong acids. This produces highly flammable methanol and boric acid. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):.
MAK (not established):. 

Routes of exposure
The substance can be absorbed into the body by inhalation, through the skin and by ingestion. 

Inhalation risk
No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20°C. 

Effects of short-term exposure
The substance is irritating to the eyes. The substance may cause effects on the central nervous system and kidneys. This may result in headache, dizziness and impaired functions. 

Effects of long-term or repeated exposure
The substance may have effects on the central nervous system and kidneys. Further see ICSC 0057 and ICSC 0991. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 68°C
Melting point: -29°C
Relative density (water = 1): 0.915
Solubility in water: reaction
Vapour pressure, kPa at 25°C: 18
Relative vapour density (air = 1): 3.6
Flash point: - 7°C
Octanol/water partition coefficient as log Pow: -1.9  
 

NOTES
Also consult ICSC # 0057 (methanol) and # 0991 (boric acid). 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations