ICSC 0515 - 4-THIAPENTANAL

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4-THIAPENTANAL	ICSC: 0515 (September 1997)
beta-(Methylmercapto) propionaldehyde beta-(Methylthio) propionaldehyde Methional

CAS #: 3268-49-3

UN #: 2785

EC Number: 221-882-5

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Combustible. Above 58°C explosive vapour/air mixtures may be formed.	NO open flames. NO contact with hot surfaces. Above 58°C use a closed system and ventilation.	Use water spray, powder, alcohol-resistant foam, carbon dioxide. In case of fire: keep drums, etc., cool by spraying with water. Combat fire from a sheltered position.

PREVENT GENERATION OF MISTS! STRICT HYGIENE!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough. Sore throat.	Use ventilation, local exhaust or breathing protection.	Fresh air, rest. Refer for medical attention.
Skin	Redness.	Protective gloves. Protective clothing.	Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention .
Eyes	Redness. Pain.	Wear safety goggles 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		Do not eat, drink, or smoke during work.	Rinse mouth. Do NOT induce vomiting. Refer for medical attention .

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Ventilation. Collect leaking and spilled liquid in sealable containers as far as possible.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 6.1; UN Pack Group: III
STORAGE
Separated from strong oxidants, strong bases, strong acids and food and feedstuffs.
PACKAGING
Do not transport with food and feedstuffs.

4-THIAPENTANAL

ICSC: 0515

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS LIQUID WITH PUNGENT ODOUR. Physical dangers The vapour is heavier than air and may travel along the ground; distant ignition possible. Chemical dangers Decomposes on burning. Decomposes on contact with hot surfaces. This produces toxic fumes. Reacts with strong oxidants, strong acids and strong bases.	Formula: C₄H₈OS / CH₃SCH₂CH₂CHO Molecular mass: 104.3 Boiling point: 165°C Melting point: -75°C Relative density (water = 1): 1.03 Solubility in water, g/100ml at 37.8°C: 17.5 Vapour pressure, Pa at 20°C: 100 Relative vapour density (air = 1): 3.60 Flash point: 58-63°C Auto-ignition temperature: 255°C Explosive limits, vol% in air: 1.3-26.1 Octanol/water partition coefficient as log Pow: -0.16

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID WITH PUNGENT ODOUR.

Physical dangers
The vapour is heavier than air and may travel along the ground; distant ignition possible.

Chemical dangers
Decomposes on burning. Decomposes on contact with hot surfaces. This produces toxic fumes. Reacts with strong oxidants, strong acids and strong bases.

Formula: C₄H₈OS / CH₃SCH₂CH₂CHO
Molecular mass: 104.3
Boiling point: 165°C
Melting point: -75°C
Relative density (water = 1): 1.03
Solubility in water, g/100ml at 37.8°C: 17.5
Vapour pressure, Pa at 20°C: 100
Relative vapour density (air = 1): 3.60
Flash point: 58-63°C
Auto-ignition temperature: 255°C
Explosive limits, vol% in air: 1.3-26.1
Octanol/water partition coefficient as log Pow: -0.16

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation. Effects of short-term exposure The substance is severely irritating to the eyes, skin and respiratory tract.	Inhalation risk No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20°C. Effects of long-term or repeated exposure Repeated or prolonged contact may cause skin sensitization.

EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is severely irritating to the eyes, skin and respiratory tract.

Inhalation risk
No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20°C.

Effects of long-term or repeated exposure
Repeated or prolonged contact may cause skin sensitization.

OCCUPATIONAL EXPOSURE LIMITS

ENVIRONMENT

NOTES

ADDITIONAL INFORMATION

EC Classification

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