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CAS

624-92-0

File Name: arkema-inc_com---885.asp
                                                              DIMETHYL DISULFIDE
Material Safety Data Sheet
Arkema Inc.
1 PRODUCT AND COMPANY IDENTIFICATION

EMERGENCY PHONE NUMBERS:
Thio and Fine Chemicals
Chemtrec: (800) 424-9300 (24hrs) or (703) 527-3887
Arkema Inc.
Medical: Rocky Mountain Poison Control Center
2000 Market Street
(866) 767-5089 (24Hrs)
Philadelphia, PA 19103
Information Telephone Numbers Phone Number Available Hrs
Customer Service 1-800-628-4453 8:30 to 5:30 EST

Product Name DIMETHYL DISULFIDE
Product Synonym(s) DMDS

Chemical Family Alkyl Sulfide
Chemical Formula C2H6S2
Chemical Name 2,3-Dithiobutane
EPA Reg Num
Product Use Industrial Use Only
Synthesis Intermediate; Sulfiding
Do NOT use this MSDS for Pesticide/ Agricultural Applications.

2 COMPOSITION / INFORMATION ON INGREDIENTS

Ingredient Name CAS RegistryNumber Typical % OSHA
Dimethyl disulfide 624-92-0 99% Y
The substance(s) marked with a "Y" in the OSHA column, are identified as hazardous chemicals according to the
criteria of the OSHA Hazard Communication Standard (29 CFR 1910.1200)

This material is classified as hazardous under Federal OSHA regulation.

The components of this product are all on the TSCA Inventory list.


3 HAZARDS IDENTIFICATION

Emergency Overview
Pale yellow liquid, strong garlic-like odor
WARNING!
FLAMMABLE LIQUID AND VAPOR.
HARMFUL IF SWALLOWED.
HARMFUL IF INHALED.
MAY CAUSE EYE AND SKIN IRRITATION.
MAY CAUSE RESPIRATORY TRACT IRRITATION.
MAY CAUSE CENTRAL NERVOUS SYSTEM EFFECTS
MAY CAUSE NAUSEA, HEADACHE OR DIZZINESS.


Potential Health Effects

Inhalation and skin contact are expected to be the primary routes of occupational exposure to this material. Based on
single exposure animal tests, it is considered to be moderately toxic if swallowed, no more than slightly toxic if
absorbed through skin, slightly toxic if inhaled, and slightly irritating to eyes and skin. This material has a strong
objectionable odor that may cause nausea, headache, or dizziness. The odor threshold is approximately 8 ppb.


Product Code: 000719 Page 1
Revision: 11 Issued: 22 JUN 2007 of 7
DIMETHYL DISULFIDE
Material Safety Data Sheet
Arkema Inc.
Prolonged or repeated contact may remove oils from the skin and may dry skin and cause irritation, redness and rash.
High vapor concentrations may be irritating to the eyes and respiratory tract, and may result in central nervous system
(CNS) effects such as headache, dizziness, nausea, drowsiness and, in severe exposures, loss of consciousness.
These CNS effects may also occur if the material is absorbed through the skin.


4 FIRST AID MEASURES

IF IN EYES, immediately flush with plenty of water. Get medical attention if irritation persists.

IF ON SKIN, immediately wash with soap and plenty of water. Remove contaminated clothing and shoes.
Get medical attention if symptoms occur. Wash clothing before reuse. Thoroughly clean shoes before reuse.

IF SWALLOWED, do NOT induce vomiting. Give water to drink. Get medical attention immediately. NEVER
GIVE ANYTHING BY MOUTH TO AN UNCONSCIOUS PERSON.

IF INHALED, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give
oxygen. Get medical attention.


5 FIRE FIGHTING MEASURES

Fire and Explosive Properties
Auto-Ignition Temperature 300 C (572 F)
Flash Point 16 C Flash Point Method TCC
Flammable Limits- Upper 16
1.1
Lower
Extinguishing Media
Use water spray, carbon dioxide, foam or dry chemical.

Fire Fighting Instructions
Use water spray to cool containers exposed to fire. Contain run-off from fire. Fire fighters and others who may
be exposed to products of combustion should wear full fire fighting turn out gear (full Bunker Gear) and self-
contained breathing apparatus (pressure demand NIOSH approved or equivalent). Fire fighting equipment
should be thoroughly decontaminated after use.
Fire and Explosion Hazards
When burned, the following hazardous products of combustion can occur:
Oxides of carbon
Sulfur oxides
Hydrogen sulfide

6 ACCIDENTAL RELEASE MEASURES

In Case of Spill or Leak
Ventilate the area. Contain spill by building a dike using absorbent material. Consult with environmental
engineer or professional to determine if neutralization is appropriate and for handling procedures for residual
materials. Do not use solid bleach for neutralization, as fire or violent reaction can occur. Collect the liquid
and solid absorbent into a drum approved for waste disposal. Flush area with water. Consult a regulatory
specialist to determine appropriate state or local reporting requirements, for assistance in waste
characterization and/or hazardous waste disposal and other requirements listed in pertinent environmental
permits.




Product Code: 000719 Page 2
Revision: 11 Issued: 22 JUN 2007 of 7
DIMETHYL DISULFIDE
Material Safety Data Sheet
Arkema Inc.

7 HANDLING AND STORAGE

Handling
Keep away from heat, sparks and flame.
Keep container closed.
Use only with adequate ventilation.
Do not taste or swallow.
Do not breathe vapor.
Avoid contact with eyes, skin and clothing.
Wash thoroughly after handling.


CONTAINER HAZARDOUS WHEN EMPTY. Emptied container retains vapor and product residue. Follow
labeled warnings even after container is emptied. RESIDUAL VAPORS MAY EXPLODE ON IGNITION. DO
NOT CUT, DRILL GRIND OR WELD ON OR NEAR THIS CONTAINER. Improper disposal or reuse of this
container may be dangerous and/or illegal.
Storage
Store in well ventilated area away from heat and sources of ignition such as flame, sparks and static
electricity. Ensure that all storage and handling equipment is properly rated, grounded and installed to satisfy
electrical classification requirements. Static electricity may accumulate and create a fire hazard. All storage
containers, including containers such as drums, cylinders and IBC鈥檚, must be bonded and grounded during
filling and emptying operations. Store away from oxidizers and reactive materials. Keep container tightly
closed. Observe all federal, state and local regulations and National Fire Protection Association (NFPA)
Codes which pertain to the specific local conditions of storage and use, including OSHA 29 CFR 1910.106
and NFPA 30, 70, 77, and 497.


8 EXPOSURE CONTROLS / PERSONAL PROTECTION

Other Protective Equipment
The following personal protection equipment (PPE) recommendation is for use of Dimethyl disulfide (DMDS)
as an Industrial Chemical.
Engineering Controls
Investigate engineering techniques to reduce exposures below airborne exposure limits. Provide ventilation
if necessary to control exposure levels below airborne exposure limits (see below). If practical, use local
mechanical exhaust ventilation at sources of air contamination such as open process equipment. Consult
ACGIH ventilation manual or NFPA Standard 91 for design of exhaust systems.
Eye / Face Protection
Where there is potential for eye contact, wear chemical goggles and have eye flushing equipment available.

Skin Protection
Butyl rubber, Nitrile gloves should be worn when handling this material. Wear face shield and chemical
resistant clothing such as a rubber apron when splashing may occur. Wash contaminated clothing and
clean protective equipment before reuse. Rinse contaminated skin promptly. Wash skin thoroughly after
handling. Wash the outside of gloves before removing.
Respiratory Protection
Avoid breathing vapor or mist. When airborne exposure limits are exceeded (see below), use NIOSH
approved respiratory protection equipment appropriate to the material and/or its components. Consult
respirator manufacturer to determine appropriate type equipment for given application. Observe respirator
use limitations specified by NIOSH or the manufacturer. For emergency and other conditions where
exposure limit may be significantly exceeded, use an approved full face positive-pressure, self-contained
breathing apparatus or positive-pressure airline with auxiliary self-contained air supply. Respiratory
protection programs must comply with 29 CFR 搂 1910.134.


Product Code: 000719 Page 3
Revision: 11 Issued: 22 JUN 2007 of 7
DIMETHYL DISULFIDE
Material Safety Data Sheet
Arkema Inc.

8 EXPOSURE CONTROLS / PERSONAL PROTECTION


Airborne Exposure Guidelines for Ingredients
Exposure Limit Value

Dimethyl disulfide
ACGIH Skin designator - Y
ACGIH TWA - 0.5 ppm
-Only those components with exposure limits are printed in this section.
-Skin contact limits designated with a "Y" above have skin contact effect. Air sampling alone is insufficient to accurately quantitate
exposure. Measures to prevent significant cutaneous absorption may be required.
-ACGIH Sensitizer designator with a value of "Y" above means that exposure to this material may cause allergic reactions.
-WEEL-AIHA Sensitizer designator with a value of "Y" above means that exposure to this material may cause allergic skin reactions.


9 PHYSICAL AND CHEMICAL PROPERTIES

Pale yellow liquid, strong garlic-like odor
Appearance/Odor
pH NE
Specific Gravity 1.063 @ 20 C
Vapor Pressure 0.42 psia
Vapor Density 3.25
Melting Point NA
Freezing Point -84.7 C (-120.5 F)
Boiling Point 107-110 C (225-232 F)
Solubility In Water Insoluble @ 20 C
Solubility in Other Materials Alcohols, hydrocarbons
Evaporation Rate NE
Percent Volatile 100
Viscosity 0.62 cP @ 20 C
Molecular Weight 94.20
n-Octanol/Water Partition Coefficient 1.77
Other Physical Data Odor Threshold: 8-10 ppb approximately
Henry鈥檚 Constant: 122.5 Pa.M3/mole
Refractive Index: 1.526 @ 20 C



10 STABILITY AND REACTIVITY


Stability
This material is chemically stable under normal and anticipated storage and handling conditions.

Incompatibility
Contact with combustible materials may enhance the risk of fire. Alkali, Acid, solid bleach (strong oxidizer) may
cause violent and fire. Keep away from heat and sources of ignition.
Hazardous Decomposition Products
Thermal decompostion giving flammable and toxic products: Hydrogen sulfide, methyl mercaptan, dimethyl
sulfide.



11 TOXICOLOGICAL INFORMATION



Product Code: 000719 Page 4
Revision: 11 Issued: 22 JUN 2007 of 7
DIMETHYL DISULFIDE
Material Safety Data Sheet
Arkema Inc.

11 TOXICOLOGICAL INFORMATION

Toxicological Information
Data on this material and/or its components are summarized below.

Single exposure (acute) studies indicate:
Oral - Moderately Toxic to Rats (290 mg/kg < LD50 < 500 mg/kg)
Dermal - No More than Slightly Toxic to Rabbits (LD50 >2,000 mg/kg)
Inhalation - Slightly Toxic to Rats (4-hr LC50 1310 ppm)
Eye Irritation - Slightly Irritating to Rabbits (7.2/110)
Skin Irritation - Slightly Irritating to Rabbits (4-hr exposure, 2.9/8.0) No mortality was seen in rabbits following a
single application to the skin, although rapid onset of eye irritation, central nervous system and respiratory signs
were noted. These effects disappeared within a day after application. No skin allergy was observed in guinea
pigs following repeated exposure. Following repeated application to the skin of rabbits, severe skin irritation and
necrosis, transient lethargy, increased mortality, spasms, and effects on the heart and red blood cells were
observed. Following repeated inhalation exposure, irritation of the eyes, nose and respiratory tract were the
most significant effects reported. Reduced body weights, slight effects on blood cells and some clinical
chemistry parameters, and microscopic changes in the nose and spleen were also observed in some studies.
No neurotoxic effects were observed. No birth defects were observed in the offspring of rats and rabbits
exposed by inhalation during pregnancy, but slight effects on the development of offspring and adverse effects
on the mothers were reported in the study with rats. No adverse effects were observed when rats were
exposed by inhalation for two successive generations. No genetic changes were observed in standard tests
using bacteria, animal cells, or animals.

12 ECOLOGICAL INFORMATION

Ecotoxicological Information
Data on this material and/or its components are summarized below.

This material is moderately toxic to Daphnia (48-hr LC50 1.8 mg/l), trout (96-hr LC50 0.97 mg/l), and bobwhite
quail (oral LD50 342 mg/kg and inhalation 4-hr LC50 478 ppm). It is slightly toxic to zebrafish (96-hr LC50 5
mg/l) and algae (72-hr EC50 14-26 mg/l), and practically non-toxic to earthworm (14d LC50 32 mg/kg soil,
NOEC=22 mg/kg soil).
Chemical Fate Information
Data on this material and/or its components are summarized below.

This material is not readily biodegradable (<10% after 28-days; OECD 301 D) and has a low potential to
bioaccumulate (log Pow 1.77). It has low sorption to soil and sediments (log Koc 2.34). It is degraded in air by
OH radicals (half-life 0.66-hrs) and is hydrolytically stable.

13 DISPOSAL CONSIDERATIONS

Waste Disposal
Incineration is the recommended method for disposal observing all local, state and federal regulations. Note:
Chemical additions to, processing of, or otherwise altering this material may make this waste management
information incomplete, inaccurate, or otherwise inappropriate. Furthermore, state and local waste disposal
requirements may be more restrictive or otherwise different from federal laws and regulations.




Product Code: 000719 Page 5
Revision: 11 Issued: 22 JUN 2007 of 7
DIMETHYL DISULFIDE
Material Safety Data Sheet
Arkema Inc.

14 TRANSPORT INFORMATION

DOT Name Dimethyl Disulfide
DOT Technical Name
DOT Hazard Class 3(6)
UN Number UN2381
DOT Packing Group PG II
RQ
DOT Special Information Primary Hazard - FLAMMABLE
Subsidiary Hazard - TOXIC


15 REGULATORY INFORMATION

Hazard Categories Under Criteria of SARA Title III Rules (40 CFR Part 370)
Immediate (Acute) Health Y Fire Y
Reactive
Delayed (Chronic) Health N N
Sudden Release of Pressure N
The components of this product are all on the TSCA Inventory list.


Ingredient Related Regulatory Information:
CERCLA RQ SARA TPQ
SARA Reportable Quantities
Dimethyl disulfide NE

Massachusetts Right to Know
This product does contain the following chemicals(s), as indicated below, currently on the Massachusetts Right to Know Substance
List.
Dimethyl disulfide
New Jersey Right to Know
This product does contain the following chemical(s), as indicated below, currently on the New Jersey Right-to-Know Substances List.
Dimethyl disulfide
Pennsylvania Environmental Hazard
This product does contain the following chemical(s), as indicated below, currently on the Pennsylvania Environmental Hazard List.
Dimethyl disulfide
Pennsylvania Right to Know
This product does contain the following chemical(s), as indicated below, currently on the Pennsylvania Hazardous Substance List.
Dimethyl disulfide

16 OTHER INFORMATION


Revision Information

Revision Number 11
22 JUN 2007
Revision Date
Supercedes Revision Dated 08-MAY-2007
Revision Summary
Use statements added

Key
NE= Not Established NA= Not Applicable (R) = Registered Trademark


Product Code: 000719 Page 6
Revision: 11 Issued: 22 JUN 2007 of 7
DIMETHYL DISULFIDE
Material Safety Data Sheet
Arkema Inc.




Miscellaneous
Product Use:
Industrial Use Only. Do NOT use this MSDS for Pesticide/Agricultural Applications.


Arkema Inc. believes that the information and recommendations contained herein (including data and
statements) are accurate as of the date hereof. NO WARRANTY OF FITNESS FOR ANY PARTICULAR
PURPOSE, WARRANTY OF MERCHANTABILITY, OR ANY OTHER WARRANTY, EXPRESSED OR
IMPLIED, IS MADE CONCERNING THE INFORMATION PROVIDED HEREIN. The information provided
herein relates only to the specific product designated and may not be valid where such product is used in
combination with any other materials or in any process. Further, since the conditions and methods of use are
beyond the control of Arkema Inc., Arkema Inc. expressly disclaims any and all liability as to any results
obtained or arising from any use of the product or reliance on such information.




Product Code: 000719 Page 7
Revision: 11 Issued: 22 JUN 2007 of 7

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