ICSC 0256 - DI-n-BUTYLTIN OXIDE

[List of Chemicals] [Risk Notes] [Risk Phrases] [Safety Phrases] [Danger Symbols]

DI-n-BUTYLTIN OXIDE

ICSC: 0256
_{April 1994}

Dibutyltin oxide
Dibutyloxostannane
Dibutyloxotin

CAS No: 818-08-6
RTECS No: WH7175000
UN No: 3146
EC No: 050-008-00-3

C₈H₁₈OSn / (C₄H₉)₂SnO
Molecular mass: 248.9

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.	T Symbol N Symbol R: 21-25-36/38-48/23/25-50/53 S: (1/2-)35-36/37/39-45-60-61 Note: A, 1 UN Hazard Class: 6.1	Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.

EMERGENCY RESPONSE	SAFE STORAGE
Transport Emergency Card: TEC (R)-61GT3-II-S	Separated from food and feedstuffs.

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/m³; 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 20°C 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	ENVIRONMENTAL DATA
Decomposes below melting point at 210°C (see Notes) Relative density (water = 1): 1.6 Solubility in water: none Auto-ignition temperature: 279°C	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.

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004

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