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TRIBUTYLTIN OXIDE
ICSC: 1282
Peer-Review Status: 26.03.1998 Validated
Hexabutyldistannoxane
Tri-n-butyltin oxide
TBTO 
CAS #: 56-35-9 RTECS #: JN8750000
UN #: 3020
EC #: 050-008-00-3
EINECS #: 200-268-0
    Formula: C24H54OSn2
Molecular mass: 596.07

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible.  NO open flames.  In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION      
 
EXPOSURE   PREVENT GENERATION OF MISTS! STRICT HYGIENE!   
Inhalation Abdominal cramps. Cough. Diarrhoea. Laboured breathing. Nausea. Sore throat. Vomiting. Symptoms may be delayed. See Notes.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Refer for medical attention. 
Skin MAY BE ABSORBED! Redness. Delayed skin burns.  Protective gloves. Protective clothing.  Rinse and then wash skin with water and soap. Refer for medical attention . 
Eyes Redness. Pain.  Wear safety spectacles, face shield or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal cramps. Diarrhoea. Nausea. Vomiting.  Do not eat, drink, or smoke during work. Wash hands before eating.  Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Give one or two glasses of water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Carefully collect remainder. Then store and dispose of according to local regulations. Do NOT wash away into sewer.  Severe marine pollutant. 
EC Classification
Symbol: T, N; R: 21-25-36/38-48/23/25-50/53; S: (1/2)-35-36/37/39-45-60-61; Note: A 
UN Classification
UN Hazard Class: 6.1; UN Pack Group: II 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61GT6-II.  Provision to contain effluent from fire extinguishing. 

IMPORTANT DATA
Physical State; Appearance
LIQUID. 

Physical dangers
No data. 

Chemical dangers
Decomposes on burning. This produces toxic fumes. 

Occupational exposure limits
TLV (as Sn): 0.1 mg/m³ as TWA; 0.2 mg/m³ as STEL; (skin); A4 (not classifiable as a human carcinogen); (ACGIH 2004).
MAK: 0.0021 ppm, 0.05 mg/m³; Peak limitation category: I(1); Pregnancy risk group: C; (DFG 2004). 

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

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly. 

Effects of short-term exposure
The substance is severely irritating to the eyes and skin. Inhalation of of the aerosol may cause lung oedema. See Notes. The substance may cause effects on the thymus. This may result in depression of the immune function. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 173°C
Melting point: <-45°C
Relative density (water = 1): 1.17 (20°C)
Solubility in water: poor
Vapour pressure, Pa at 20°C: 0.001
Flash point: 190°C c.c.
Octanol/water partition coefficient as log Pow: 3.19  
The substance is very toxic to aquatic organisms. Bioaccumulation of this chemical may occur along the food chain, for example in fish and molluscs. This substance does enter the environment under normal use. Great care, however, should be taken to avoid any additional release, for example through inappropriate disposal. 

NOTES
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort.
Rest and medical observation is therefore essential.
Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered.
Card has been partly updated in October 2004 and April 2005.
See sections Occupational Exposure Limits, EU classification, Emergency Response. 

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
       Tributyltin oxide (CICADS 14, 1999)