Product Identification

Product Name

Hexabutyldistannoxane

Synonyms

Bis(tributyltin) oxide
Hexabutyldistannoxane
Tri-n-butyltin oxide

CAS

56-35-9

Formula

C24H54OSn2

Molecular Weight

596.08000000000004

EINECS

200-268-0

RTECS

JN8750000

RTECS Class

Agricultural Chemical and Pesticide; Tumorigen; Organometallic; Mutagen; Reproductive Effector; Primary Irritant

Beilstein/Gmelin

745057

EC Index Number

050-008-00-3

EC Class

toxic, irritant, dangerous for the environment

Physical and Chemical Properties

Appearance

Clear pale yellow liquid.

Solubility in water

Insoluble

Boiling Point

475

Vapor Pressure

1E-8 (25 C)

Density

1.170 g/cm3 (20 C)

Partition Coefficient

17.16

Heat Of Vaporization

71.0 kJ/mol

Usage

Fungicide and bactericide in underwater and antifouling paints, pesticide.

Vapor Density

20.6

Refractive Index

1.49 (20 C)

First Aid Measures

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.

Handling and Storage

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.

Hazards Identification

Inhalation

May cause respiratory tract irritation.

Skin

Causes skin irritation. Harmful if absorbed through the skin.

Eyes

Causes eye irritation.

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.

Hazards

When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.

EC Risk Phrase

R 21 25 36/38 48/23/25 50/53

EC Safety Phrase

S 35 36/37/39 45 60 61

UN (DOT)

3020

Exposure Controls/Personal Protection

Personal 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.

Exposure Effects

Repeated exposure may cause central nervous system damage.

Exposure limit(s)

TLV (as tin): ppm; 0.1 mg/m3 A4, STEL 0.2 mg/m3 A4 (skin) (ACGIH 1997).

Poison Class

3

Fire Fighting Measures

Flash Point

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.

Accidental Release Measures

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.

Stability and Reactivity

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.

Combustion Products

Toxic gases and vapors may be released in a fire involving organic tin compounds.

Transport Information

UN Number

3020

Hazard Class

6.1

Packing Group

I; II; III

HS Code

2931 00 95