International Chemical Safety Cards

TRIMETHYL BORATE ICSC: 0593
TRIMETHYL BORATE
Methyl borate
Trimethoxyborine
C3H9BO3 / B(OCH3)3
Molecular mass: 103.9
CAS # 121-43-7
RTECS # ED5600000
ICSC # 0593
UN # 2416
EC # 005-005-00-1
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Flammable. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames, NO sparks, and NO smoking.
Foam, alcohol-resistant foam, powder, carbon dioxide.
EXPLOSION Vapour/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting.
In case of fire: cool drums, etc., by spraying with water but avoid contact of the substance with water.
 
EXPOSURE


INHALATION Cough. Sore throat.
Ventilation.
Fresh air, rest.
SKIN Redness. Burning sensation.
Protective gloves.
Rinse skin with plenty of water or shower.
EYES Redness. Pain.
Safety spectacles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
INGESTION Burning sensation. Abdominal pain.
Do not eat, drink, or smoke during work.
Rinse mouth. Refer for medical attention.
SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in dry sand or inert absorbent and remove to safe place. Do NOT wash away into sewer (extra personal protection: self-contained breathing apparatus).
Fireproof. Separated from strong oxidants, acids. Dry.
Airtight.
Xn symbol
R: 10-21
S: (2-)23-25
UN Hazard Class: 3
UN Packing Group: II
SEE IMPORTANT INFORMATION ON BACK
ICSC: 0593 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards

TRIMETHYL BORATE ICSC: 0593

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PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID.

PHYSICAL DANGERS:
The vapour is heavier than air and may travel along the ground; distant ignition possible.

CHEMICAL DANGERS:
The substance decomposes on heating or on burning producing toxic fumes including boron oxide. Reacts with oxidants causing fire and explosion hazard. Reacts with water, moist air and acids to form highly flammable methanol and boric acid.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV not established.


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its vapour and by ingestion.

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

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes, the skin and the respiratory tract.


PHYSICAL
PROPERTIES
 Boiling point: 68°C
Melting point: -29°C
Relative density (water = 1): 0.915		 Solubility in water: reaction
Relative vapour density (air = 1): 3.6
Flash point: <27°c
ENVIRONMENTAL
DATA
N O T E S
Also consult ICSC # 0057 (methanol) and # 0567 (sodium borate).
NFPA Code: H2; F3; R1
ADDITIONAL INFORMATION


ICSC: 0593 TRIMETHYL BORATE
© IPCS, CEC, 1993
IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use.