SODIUM METHYL MERCAPTIDE
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 SODIUM METHYL MERCAPTIDE
Product Synonym(s)
Chemical Family Alkyl Mercaptan
Chemical Formula CH4S.Na
Chemical Name Methanethiol, sodium salt
EPA Reg Num
Product Use Organic Synthesis
2 COMPOSITION / INFORMATION ON INGREDIENTS
Ingredient Name CAS RegistryNumber Typical % OSHA
Sodium methyl mercaptide 5188-07-8 21 Y
Water 7732-18-5 79 N
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
Clear liquid with mercaptan odor
DANGER!
FLAMMABLE LIQUID AND VAPOR.
CAUSES EYE AND SKIN BURNS. MAY CAUSE BLINDNESS.
MAY BE HARMFUL IF SWALLOWED.
MAY CAUSE BLOOD EFFECTS AFTER REPEATED EXPOSURE
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 slightly toxic if swallowed, no more than moderately toxic if
absorbed through skin and corrosive to skin and eyes. Studies in laboratory animals indicate this material may cause
blood effects.
Product Code: 000982 Page 1
Revision: 7 Issued: 27 OCT 2005 of 6
SODIUM METHYL MERCAPTIDE
Material Safety Data Sheet
Arkema Inc.
4 FIRST AID MEASURES
IF IN EYES, immediately flush with plenty of water for at least 15 minutes. Get medical attention immediately.
IF ON SKIN, immediately flush with plenty of water. Remove contaminated clothing and shoes. Get medical
attention. Wash clothing before reuse. Destroy contaminated shoes.
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 NE
Flash Point 27 C Flash Point Method
Flammable Limits- Upper NE
NE
Lower
Extinguishing Media
Use water spray, carbon dioxide, foam or dry chemical.
Fire Fighting Instructions
Water may be ineffective. Use water spray or water fog to cool surrounding surfaces and prevent fire damage
or rupture of containers. Fire fighters and others who may be exposed to products of combustion should wear
full fire fighting 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:
Sulfur oxides
Oxides of carbon
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.
7 HANDLING AND STORAGE
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SODIUM METHYL MERCAPTIDE
Material Safety Data Sheet
Arkema Inc.
7 HANDLING AND STORAGE
Handling
Do not get in eyes, on skin or on clothing.
Keep container closed.
Use only with adequate ventilation.
Wash thoroughly after handling.
Keep away from heat, sparks and flame.
Do not taste or swallow.
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
Engineering Controls
Investigate engineering techniques to reduce exposures. Provide ventilation if necessary to minimize
exposures. 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 a face shield, chemical goggles, and have eye flushing
equipment immediately available.
Skin Protection
Wear appropriate chemical resistant protective clothing and chemical resistant gloves to prevent skin
contact. Neoprene Gloves should be worn when handling this material. Wear chemical goggles, a face
shield, and chemical resistant clothing such as a rubber apron when splashing may occur. Rinse immediately
if skin is contaminated. Remove contaminated clothing promptly and wash before reuse. Clean protective
equipment before reuse. Provide a safety shower at any location where skin contact can occur. Wash skin
thoroughly after handling.
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. Full facepiece
equipment is recommended and, if used, replaces need for face shield and chemical goggles. 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
Product Code: 000982 Page 3
Revision: 7 Issued: 27 OCT 2005 of 6
SODIUM METHYL MERCAPTIDE
Material Safety Data Sheet
Arkema Inc.
8 EXPOSURE CONTROLS / PERSONAL PROTECTION
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.
Airborne Exposure Guidelines for Ingredients
The components of this product have no established Airborne Exposure Guidelines
-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
Clear liquid with mercaptan odor
Appearance/Odor
pH 11
Specific Gravity NE
Vapor Pressure NE
Vapor Density 2.3
Melting Point NE
Freezing Point 5 C (41 F) Approx.
Boiling Point NE
Solubility In Water Completely soluble
Solubility in Other Materials Alcohols
Evaporation Rate NE
Percent Volatile NE
Viscosity 6.02 cP @ 20 C
Molecular Weight 71.09
Other Physical Data Crystallization point: 0 C
10 STABILITY AND REACTIVITY
Stability
This material is chemically stable under normal and anticipated storage and handling conditions.
Hazardous Polymerization
Does not occur.
Incompatibility
Avoid contact with acids and strong oxidizing agents.
Hazardous Decomposition Products
Contact with acids releases methyl mercaptan, which is toxic and flammable and contact with oxidizing agents
releases sulfur dioxide.
11 TOXICOLOGICAL INFORMATION
Product Code: 000982 Page 4
Revision: 7 Issued: 27 OCT 2005 of 6
SODIUM METHYL MERCAPTIDE
Material Safety Data Sheet
Arkema Inc.
11 TOXICOLOGICAL INFORMATION
Toxicological Information
Data on this material and/or its components are summarized below. Sodium Methyl Mercaptide
Single exposure (acute) studies indicate that this material is slightly toxic if swallowed [rat LD50 559 - 581
mg/kg), no more than moderately toxic if absorbed through skin (rat LD50 >400 mg/kg) and corrosive to rabbit
skin.
No skin allergy was observed in guinea pigs following repeated exposure. No genetic changes were observed
in standard tests using bacteria, animal cells or animals, changes were observed in human cells. Following
repeated oral exposure, liver, spleen, and blood effects were observed in rats but no adverse reproductive or
developmental effects.
12 ECOLOGICAL INFORMATION
Ecotoxicological Information
This material is moderately toxic to Daphnia magna (48-hr EC50 1.32-2.46 mg/l), freshwater fish (96-hr LC50
1.8 mg/l), and algae (72-hr EbC50=6.3 mg/ml;ErC50=15 mg/l).
Chemical Fate Information
Data on this material and/or its components are summarized below.
This material is readily biodegradable (64% after 21-days).
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.
14 TRANSPORT INFORMATION
DOT Name Corrosive liquids, flammable, n.o.s.
DOT Technical Name (Sodium methyl mercaptide)
DOT Hazard Class 8; 3
UN Number UN 2920
DOT Packing Group PG I
RQ No
DOT Special Information Subsidiary: Flammable (3)
15 REGULATORY INFORMATION
Hazard Categories Under Criteria of SARA Title III Rules (40 CFR Part 370)
Immediate (Acute) Health Y Fire Y
Reactive N
Delayed (Chronic) Health Y
Sudden Release of Pressure N
The components of this product are all on the TSCA Inventory list.
Product Code: 000982 Page 5
Revision: 7 Issued: 27 OCT 2005 of 6
SODIUM METHYL MERCAPTIDE
Material Safety Data Sheet
Arkema Inc.
Ingredient Related Regulatory Information:
CERCLA RQ SARA TPQ
SARA Reportable Quantities
Water NE
Sodium methyl mercaptide NE
16 OTHER INFORMATION
Revision Information
Revision Number 7
27 OCT 2005
Revision Date
Supercedes Revision Dated 19-OCT-2004
Revision Summary
Revised sections 3, and 11.
Key
NE= Not Established NA= Not Applicable (R) = Registered Trademark
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.
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Revision: 7 Issued: 27 OCT 2005 of 6
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