Tributyltin oxide

  • Hexabutyldistannoxane
  • Tri-n-butyltin oxide
  • bis(tributyltin) oxide
Formula
C24H54OSn2
Structure
Description
Clear pale yellow liquid.
Uses
Fungicide and bactericide in underwater and antifouling paints, pesticide.

Registry Numbers and Inventories.
CAS
56-35-9
EC (EINECS/ELINCS)
200-268-0
EC Index Number
050-008-00-3
EC Class
toxic, irritant, dangerous for the environment
R 21 25 36/38 48/23/25 50/53
S 35 36/37/39 45 60 61
RTECS
JN8750000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Organometallic; Mutagen; Reproductive Effector; Primary Irritant
UN (DOT)
3020
Beilstein/Gmelin
745057
EPA OPP
83001
Swiss Giftliste 1
G-2983
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C24H54OSn2
Formula mass
596.08
Boiling point, °C
475
Vapor pressure, mmHg
1E-8 (25 C)
Vapor density (air=1)
20.6
Density
1.170 g/cm3 (20 C)
Solubility in water
Insoluble
Viscosity
4.8 centistokes at 25C
Refractive index
1.49 (20 C)
Partition coefficient, pKow
17.16
Heat of vaporization
71.0 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Wash clothing before reuse.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Absorb spill using an absorbent, non-combustible material such as earth, sand, or vermiculite. Provide ventilation.
Disposal code
9
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide, tin/tin oxides.

Fire.
Flash Point,°C
190
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use flooding quantities of water. Do NOT use straight streams of water. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
This chemical is probably combustible.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Combustion products
Toxic gases and vapors may be released in a fire involving organic tin compounds.
Health
2
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV (as tin): ppm; 0.1 mg/m3 A4, STEL 0.2 mg/m3 A4 (skin) (ACGIH 1997).
Poison_Class
3
Exposure effects
Repeated exposure may cause central nervous system damage.
   Ingestion
Harmful if swallowed. May cause gastrointestinal irritation with nausea, vomiting and diarrhea. Inorganic tin salts may cause systemic effects on the central nervous system, heart and liver.
   Inhalation
May cause respiratory tract irritation.
   Skin
Causes skin irritation. Harmful if absorbed through the skin.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
3020
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
HS Code
2931 00 95