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DI-n-BUTYLTIN OXIDE ICSC: 0256
Date of Peer Review: April 1994

Dibutyltin oxide
Dibutyloxostannane
Dibutyloxotin
CAS # 818-08-6 C8H18OSn/(C4H9)2SnO
RTECS # WH7175000 Molecular mass: 248.9
UN # 3146
EC Index # 050-008-00-3
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Water spray. Powder. Carbon dioxide.
EXPLOSION Finely dispersed particles form explosive mixtures in air.
Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding).

EXPOSURE
PREVENT DISPERSION OF DUST! STRICT HYGIENE! AVOID EXPOSURE OF (PREGNANT) WOMEN!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Headache. Ringing in the ears, memory loss, disorientation.
Local exhaust or breathing protection.
Fresh air, rest. Refer for medical attention.
Skin MAY BE ABSORBED! Skin burns. Pain. (Further see Inhalation).
Protective gloves.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
Eyes Redness. Pain.
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 take to a doctor.
Ingestion (Further see Inhalation).
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Give a slurry of activated charcoal in water to drink. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Do NOT wash away into sewer. Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Personal protection: P3 filter respirator for toxic particles.
Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
EU 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, 1]
UN Classification
UN Hazard Class: 6.1

EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GT3-II-S
Separated from food and feedstuffs.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
DI-n-BUTYLTIN OXIDE ICSC: 0256
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
WHITE POWDER.

PHYSICAL DANGERS:
Dust explosion possible if in powder or granular form, mixed with air. If dry, it can be charged electrostatically by swirling, pneumatic transport, pouring, etc.

CHEMICAL DANGERS:
The substance decomposes on heating producing toxic fumes of tin, tin oxides.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (as Sn) 0.1 ppm as TWA, 0.2 ppm as STEL; (skin); A4 (not classifiable as a human carcinogen); (ACGIH 2004).
MAK: (as Sn) (Inhalable fraction) 0.1 mg/m; Peak limitation category: II(2); skin absorption (H); Pregnancy risk group: D; (DFG 2004).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, through the skin and by ingestion.

INHALATION RISK:
Evaporation at 20C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the eyes, the skin and the respiratory tract. The substance may cause effects on the central nervous system, resulting in impaired functions. Exposure may result in death. The effects may be delayed. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The substance may have effects on the liver, resulting in liver impairment. Animal tests show that this substance possibly causes malformations in human babies.
PHYSICAL PROPERTIES
Decomposes below melting point at 210C (see Notes)
Relative density (water = 1): 1.6
Solubility in water: none
Auto-ignition temperature: 279C
ENVIRONMENTAL DATA
This substance may be hazardous to the environment; special attention should be given to algae and crustacea.
NOTES
Different values are found in literature. Depending on the degree of exposure, periodic medical examination is suggested. The symptoms of poisoning do not become manifest until days. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, EU classification, Emergency Response.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor 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
IPCS, CEC 2005
See Also:
        Di-n-butyltin oxide (CHEMINFO)