ICSC 0256 - DI-n-BUTYLTIN OXIDE

DI-n-BUTYLTIN OXIDE	ICSC: 0256 (April 2017)
Dibutyloxostannane Dibutyloxotin Dibutyltin oxide

CAS #: 818-08-6

UN #: 3146

EC Number: 212-449-1

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Combustible. Gives off irritating or toxic fumes (or gases) in a fire. Finely dispersed particles form explosive mixtures in air.	NO open flames. Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust. Prevent build-up of electrostatic charges (e.g., by grounding).	Use water spray, powder, carbon dioxide.

AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Headache. Confusion.	Use local exhaust or breathing protection.	Fresh air, rest. Refer for medical attention.
Skin	Redness. 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.	Wear 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	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. Refer for medical attention .

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.	According to UN GHS Criteria DANGER Fatal if swallowed Causes skin and eye irritation May cause damage to the nervous system Very toxic to aquatic life with long lasting effects Transportation UN Classification UN Hazard Class: 6.1
STORAGE
Cool. Separated from food and feedstuffs, oxidants and bases. Provision to contain effluent from fire extinguishing.
PACKAGING
Unbreakable packaging. Put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.

DI-n-BUTYLTIN OXIDE

ICSC: 0256

PHYSICAL & CHEMICAL INFORMATION
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 Decomposes on heating. This produces toxic fumes of tin and tin oxides. Reacts under certain circumstances with oxidants and bases.	Formula: C₈H₁₈OSn/(C₄H₉)₂SnO/(C₈H₁₈SnO)_x Molecular mass: 248.9 Molecular mass: see Notes Boiling point: 161.9°C Melting point: 105°C Relative density (water = 1): 1.5 Solubility in water, mg/l at 20°C: 3.9-4.2 (very poor) Vapour pressure, Pa at 25°C: 0.000004 Auto-ignition temperature: 279°C Octanol/water partition coefficient as log Pow: 5.33 (calculated)

PHYSICAL & CHEMICAL INFORMATION

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
Decomposes on heating. This produces toxic fumes of tin and tin oxides. Reacts under certain circumstances with oxidants and bases.

Formula: C₈H₁₈OSn/(C₄H₉)₂SnO/(C₈H₁₈SnO)_x
Molecular mass: 248.9 Molecular mass: see Notes
Boiling point: 161.9°C
Melting point: 105°C
Relative density (water = 1): 1.5
Solubility in water, mg/l at 20°C: 3.9-4.2 (very poor)
Vapour pressure, Pa at 25°C: 0.000004
Auto-ignition temperature: 279°C
Octanol/water partition coefficient as log Pow: 5.33 (calculated)

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation and by ingestion. Effects of short-term exposure The substance is irritating to the eyes, skin and respiratory tract. The substance may cause effects on the nervous system. This may result in impaired functions. Exposure could cause death.	Inhalation risk A harmful concentration of airborne particles can be reached quickly when dispersed. Effects of long-term or repeated exposure

EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation and by ingestion.

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. The substance may cause effects on the nervous system. This may result in impaired functions. Exposure could cause death.

Inhalation risk
A harmful concentration of airborne particles can be reached quickly when dispersed.

Effects of long-term or repeated exposure

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). EU-OEL: (as Sn): 2 mg/m³ as TWA. MAK: (as Sn): 0.004 mg/m³, 0.02 ppm; peak limitation category: I(1); skin absorption (H); carcinogen category: 4; pregnancy risk group: B

ENVIRONMENT
The substance is very toxic to aquatic organisms. The substance may cause long-term effects in the aquatic environment. 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
Molecular mass can vary because Dibutyltin oxide can occur in a partial polymerized form, on which its stability depends. Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken.

ADDITIONAL INFORMATION

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, 1

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    See Also:
       Toxicological Abbreviations