ICSC 1586 - DIMETHYL DISULFIDE

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DIMETHYL DISULFIDE	ICSC: 1586 (June 2015)
Methyl disulfide Disulfide, dimethyl- DMDS

CAS #: 624-92-0

UN #: 2381

EC Number: 210-871-0

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire. Above 10°C explosive vapour/air mixtures may be formed.	NO open flames, NO sparks and NO smoking. Above 10°C use a closed system, ventilation and explosion-proof electrical equipment.	Use water spray, powder, foam, carbon dioxide. In case of fire: keep drums, etc., cool by spraying with water.

PREVENT GENERATION OF MISTS!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough. Sore throat. Headache. Nausea. Dizziness. Drowsiness.	Use ventilation, local exhaust or breathing protection.	Fresh air, rest. Refer for medical attention.
Skin	EASILY ABSORBED! Redness. Further see Inhalation.	Protective gloves. Protective clothing.	Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention .
Eyes	Redness. Pain.	Wear safety goggles.	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.	Rinse mouth. Do NOT induce vomiting. Give nothing to drink. Refer for medical attention .

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Remove all ignition sources. Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Ventilation. Do NOT wash away into sewer. Do NOT let this chemical enter the environment. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb liquid in sand or inert absorbent. Carefully collect remainder in sealable containers. Store and dispose of according to local regulations.	According to UN GHS Criteria DANGER Highly flammable liquid and vapour Toxic if inhaled Harmful if swallowed Causes serious eye irritation May cause respiratory irritation May cause drowsiness or dizziness May be harmful if swallowed and enters airways Very toxic to aquatic life with long lasting effects Transportation UN Classification UN Hazard Class: 3; UN Subsidiary Risks: 6.1; UN Pack Group: II
STORAGE
Fireproof. Well closed. Separated from oxidants. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing.
PACKAGING

DIMETHYL DISULFIDE

ICSC: 1586

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance LIQUID WITH CHARACTERISTIC ODOUR. Physical dangers The vapour mixes well with air, explosive mixtures are easily formed. Chemical dangers Decomposes on burning. This produces toxic and corrosive fumes including sulfur oxides. Reacts violently with oxidants. This generates fire and explosion hazard.	Formula: C₂H₆S₂ Molecular mass: 94.2 Boiling point: 110°C Melting point: -85°C Relative density (water = 1): 1.06 Solubility in water, g/l at 20°C: 2.5 (poor) Vapour pressure, kPa at 25°C: 3.8 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.08 Flash point: 10°C c.c. Auto-ignition temperature: >300°C Explosive limits, vol% in air: 1.1-16 Octanol/water partition coefficient as log Pow: 1.77 Relative vapour density (air = 1): 3.2 Viscosity: 0.58 mm²/s at 20°C

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
LIQUID WITH CHARACTERISTIC ODOUR.

Physical dangers
The vapour mixes well with air, explosive mixtures are easily formed.

Chemical dangers
Decomposes on burning. This produces toxic and corrosive fumes including sulfur oxides. Reacts violently with oxidants. This generates fire and explosion hazard.

Formula: C₂H₆S₂
Molecular mass: 94.2
Boiling point: 110°C
Melting point: -85°C
Relative density (water = 1): 1.06
Solubility in water, g/l at 20°C: 2.5 (poor)
Vapour pressure, kPa at 25°C: 3.8
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.08
Flash point: 10°C c.c.
Auto-ignition temperature: >300°C
Explosive limits, vol% in air: 1.1-16
Octanol/water partition coefficient as log Pow: 1.77
Relative vapour density (air = 1): 3.2
Viscosity: 0.58 mm²/s at 20°C

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation, through the skin and by ingestion. Effects of short-term exposure The substance is irritating to the eyes and respiratory tract. The substance is mildly irritating to the skin. If swallowed the substance may cause vomiting and could result in aspiration pneumonitis. The substance may cause effects on the central nervous system.	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

EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is irritating to the eyes and respiratory tract. The substance is mildly irritating to the skin. If swallowed the substance may cause vomiting and could result in aspiration pneumonitis. The substance may cause effects on the central nervous system.

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

OCCUPATIONAL EXPOSURE LIMITS
TLV: 0.5 ppm as TWA; (skin)

ENVIRONMENT
It is strongly advised not to let the chemical enter into the environment. The substance is very toxic to aquatic organisms. The substance may cause long-term effects in the aquatic environment.

NOTES

ADDITIONAL INFORMATION

EC Classification
Symbol: F, Xn, N; R: 11-20/22-36/37-43-50/53; S: 16-26-33-36/37-60-61

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