Product ID:METHYL MERCAPTAN
MSDS Date:Jan 24 1989
MSDS Number: EEEJS
Kit Part:=== Responsible Party ===
Company Name:MATHESON TRI-GAS, INC.
Address:959 ROUTE 46 EAST
City:PARSIPPANY
State:NJ
ZIP:07054-0624
Country:US
Info Phone Num:(USA) 973-257-1100, (WHITBY) 905-668-3570, (EDMONTON)
780-471-4036
Chemtrec Ind/Phone:18004249300

Telephone: (USA) 973-257-1100, (WHITBY) 905-668-3570, (EDMONTON)

METHYL MERCAPTAN

CAS: 74-93-1

Fraction By Weight: 100.0%

Reports of Carcinogenicity:NTP:No IARC:No OSHA:No
Health Hazards Acute and Chronic:INHALATION: SHORT TERM EXPOSURE:
irritation, nausea, vomiting, wheezing, irregular heartbeat,
headache, symptoms of drunkenness, bluish skin color, suffocation,
lung congestion, blood disorders, kidney damage, liver damage,
convulsions, coma LONG TERM EXPOSURE: lung damage SKIN CONTACT:
SHORT TERM EXPOSURE: irritation, blisters LONG TERM EXPOSURE: same
as effects reported in short term exposure EYE CONTACT: SHORT TERM
EXPOSURE: irritation, blurred vision LONG TERM EXPOSURE: same as
effects reported in short term exposure INGESTION: SHORT TERM
EXPOSURE: same as effects reported in other routes of exposure,
frostbite LONG TERM EXPOSURE: no information is available
Medical Cond Aggravated by Exposure:

First Aid: INHALATION: If adverse effects occur, remove to
uncontaminated area. Give artificial respiration if not breathing.
If breathing is difficult, oxygen should be administered by
qualified personnel. Get immediate medical attention. SKIN CONTACT:
If frostbite or freezing occur, immediately flush with plenty of
lukewarm water (105-115 F; 41-46 C). DO NOT USE HOT WATER. If warm
water is not available, gently wrap affected parts in blankets. Get
immediate medical attention. EYE CONTACT: Wash eyes immediately
with large amounts of water, occasionally lifting upper and lower
lids, until no evidence of chemical remains. Get medical attention
immediately. INGESTION: If a large amount is swallowed, get medical
attention. ANTIDOTE: amyl nitrite, inhalation; sodium nitrite,
intravenous; pyridoxine, intravenous; urea, intravenous. CAUTION!
Get medical attention immediately.

Flash Point:<0 F (<-18 C) (OC)
Lower Limits:3.9%
Upper Limits:21.8%
Extinguishing Media:alcohol resistant foam Let burn unless leak can be
stopped immediately. Large fires: Use regular foam or flood with
fine water spray.
Fire Fighting Procedures:Move container from fire area if it can be
done without risk. Withdraw immediately in case of rising sound
from venting safety device or any discoloration of tanks due to
fire. Cool containers with water spray until well after the fire is
out. Keep unnecessary people away, isolate hazard area and deny
entry. For tank, rail car or tank truck, evacuation radius:
Evacuation radius: 800 meters (1/2 mile).
Unusual Fire/Explosion Hazard:Severe fire hazard. The vapor is heavier
than air. Vapors or gases may ignite at distant ignition sources
and flash back. Vapor/air mixtures are explosive. Electrostatic
discharges may be generated by flow or agitation resulting in
ignition or explosion.

Neutralizing Agent:

Handling and Storage Precautions:Store and handle in accordance with
all current regulations and standards. Subject to storage
regulations: U.S. OSHA 29 CFR 1910.101. Grounding and bonding
required. Keep separated from incompatible substances. Notify State
Emergency Response Commission for storage or use at amounts greater
than or equal to the TPQ (U.S. EPA SARA Section 302). SARA Section
303 requires facilities storing a material with a TPQ to
participate in local emergency response planning (U.S. EPA 40 CFR
355.30).
Other Precautions:

Respiratory Protection:The following respirators and maximum use
concentrations are drawn from NIOSH and/or OSHA. 5 ppm Any chemical
cartridge respirator with organic vapor cartridge(s). Any
supplied-air respirator. 12.5 ppm Any supplied-air respirator. Any
powered, air-purifying respirator with organic vapor cartridge(s).
25 ppm Any chemical cartridge respirator with a full facepiece and
organic vapor cartridge(s). Any air-purifying respirator with a
full facepiece and an organic vapor canister. Any powered,
air-purifying respirator with a full facepiece and organic vapor
cartridge(s). Any supplied-air respirator with a full facepiece.
Any self-contained breathing apparatus with a full facepiece. Any
supplied-air respirator with a full facepiece. 150 ppm Any
supplied-air respirator operated in a pressure-demand or other
positive-pressure mode. Escape - Any air-purifying respirator with
a full facepiece and an organic vapor canister. Any appropriate
escape-type, self-contained breathing apparatus. For Unknown
Concentrations or Immediately Dangerous to Life or Health - Any
supplied-air respirator with full facepiece and operated in a
pressure-demand or other positive-pressure mode in combination with
a separate escape supply. Any self-contained breathing apparatus
with a full facepiece.
Ventilation:Provide local exhaust or process enclosure ventilation
system. Ventilation equipment should be explosion-resistant if
explosive concentrations of material are present. Ensure compliance
with applicable exposure limits.
Protective Gloves:Wear insulated gloves.
Eye Protection:Wear splash resistant safety goggles with a faceshield.
Provide an emergency eye wash fountain and quick drench shower in
the immediate work area.
Other Protective Equipment:For the gas: Wear appropriate chemical
resistant clothing. For the liquid: Wear appropriate protective,
cold insulating clothing.
Supplemental Safety and Health
METHYL MERCAPTAN: 10 ppm (20 mg/m3) OSHA ceiling 0.5 ppm (1 mg/m3)
OSHA TWA (vacated by 58 FR 35338, June 30, 1993) 0.5 ppm ACGIH TWA
0.5 ppm (1 mg/m3) NIOSH recommended ceiling 15 minute(s)

Boiling Pt:43 F (6 C)
Melt/Freeze Pt:-189 F (-123 C)
Vapor Pres:1535 mmHg @ 21.1 C
Vapor Density:1.66
Spec Gravity:Not applicable
pH:Not applicable
Evaporation Rate & Reference:Not applicable
Solubility in Water:2.4% @ 20 C
Appearance and Odor:PHYSICAL STATE:gas COLOR:colorless PHYSICAL
FORM:liquid ODOR:garlic odor
Corrosion Rate:

Stability Indicator/Materials to Avoid:Contact with water or moist air
may form flammable and/or toxic gases or vapors.
Stability Condition to Avoid:Avoid heat, flames, sparks and other
sources of ignition. Minimize contact with material. Avoid
inhalation of material or combustion by-products. Keep out of water
supplies and sewers.
Hazardous Decomposition Products:Thermal decomposition products: oxides
of sulfur Thermal decomposition products: oxides of sulfur
Conditions to Avoid Polymerization:Will not polymerize.

Waste Disposal Methods:Dispose in accordance with all applicable
regulations. Subject to disposal regulations: U.S. EPA 40 CFR 262.
Hazardous Waste Number(s): U153.

Toxicological Information:METHYL MERCAPTAN: TOXICITY DATA: 675 ppm
inhalation-rat LC50 LOCAL EFFECTS: Irritant: inhalation, skin, eye
ACUTE TOXICITY LEVEL: Toxic: inhalation TARGET ORGANS: blood,
central nervous system MUTAGENIC DATA: Available.

Disclaimer (provided with this information by the compiling agencies):
This information is formulated for use by elements of the Department
of Defense. The United States of America in no manner whatsoever,
expressly or implied, warrants this information to be accurate and
disclaims all liability for its use. Any person utilizing this
document should seek competent professional advice to verify and
assume responsibility for the suitability of this information to their
particular situation.

Ecological:ECOTOXICITY DATA: FISH TOXICITY: 500 ug/L 5 hour(s)
(Mortality) Spotfin shiner (Notropis spilopterus) INVERTEBRATE
TOXICITY: 50000 ug/L 48 hour(s) (Mortality) Midge (Chironomus sp)

Transport Information:U.S. DOT 49 CFR 172.101: PROPER SHIPPING NAME:
Methyl mercaptan ID NUMBER: UN1064 HAZARD CLASS OR DIVISION: 2.3
LABELING REQUIREMENTS: Poison gas; Flammable gas QUANTITY
LIMITATIONS: PASSENGER AIRCRAFT OR RAILCAR: Forbidden CARGO
AIRCRAFT ONLY: 25 kg

SARA Title III Information: SARA TITLE III SECTION 302 EXTREMELY
HAZARDOUS SUBSTANCES (40 CFR 355.30): METHYL MERCAPTAN: 500LBSTPQ
SARA TITLE III SECTION 304 EXTREMELY HAZARDOUS SUBSTANCES (40 CFR
355.40): METHYL MERCAPTAN: 100LBSRQ SARA TITLE III SARA SECTIONS
311/312 HAZARDOUS CATEGORIES (40 CFR 370.21): ACUTE: Yes
CHRONIC: No FIRE: Yes REACTIVE: No SUDDEN RELEASE: Yes SARA
TITLE III SECTION 313 (40 CFR 372.65): METHYL MERCAPTAN
Federal Regulatory Information:CERCLA SECTIONS 102a/103 HAZARDOUS
SUBSTANCES (40 CFR 302.4): METHYL MERCAPTAN: 100LBSRQ OSHA PROCESS
SAFETY (29CFR1910.119): METHYL MERCAPTAN: 5000LBSTQ
State Regulatory Information: California Proposition 65: Not regulated.