Tel: 514-956-7503

                                                                       Fax: 514-956-7504

                                                                     Internet: www.megs.ca

                                                                    Email : support@megs.ca





Montreal               St-Laurent              Tel : 514-956-7503      Fax : 514-956-7504

Ottawa                 Nepean                  Tel : 613-226-4228      Fax : 613-226-4229

Quebec                 Quebec                  Tel : 418-834-7447      Fax : 418-834-3774

   TERT-BUTYL MERCAPTAN- MATERIAL SAFETY DATA SHEET







TABLE OF CONTENTS:

                                                        24 Hour EMERGENCY

1.  Chemical Product and Company Identification

                                                        CONTACT

2.  Composition, Information on Ingredients

3.  Hazards Identification

4.  First Aid Measures

                                                        U.S- CHEMTREC 1-800-

5.  Fire Fighting Measures

                                                        424-9300

6.  Accidental Release Measures

7.  Handling and Storage

8.  Exposure Controls, Personal Protection              CANADA- CANUTEC 613-

9.  Physical and Chemical Properties

                                                        996-6666

10. Stability and Reactivity

11. Toxicological Information

12. Ecological Information

13. Disposal Considerations

14. Transport Information

15. Regulatory Information

16. Other Information









1. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION-----------Up to Table

of Contents



Matheson Tri-Gas, Inc.



The telephone numbers listed below are

emergency numbers, please contact your local

branch for routine inquiries.



           USA                  CANADA

    959 Route 46 East        530 Watson Street

  Parsippany, New Jersey       Whitby, Ontario

     07054-0624 USA           L1N 5R9 Canada

   Phone: 973-257-1100      Phone: 905-668-3570



SUBSTANCE: TERT-BUTYL MERCAPTAN

SYMBOL: C4H10S



TRADE NAMES/SYNONYMS:

2-METHYL-2-PROPANETHIOL; TERT-BUTANETHIOL; TERT-BUTYLTHIOL; 1,1-

DIMETHYLETHANETHIOL; 2-ISOBUTANETHIOL; 2-PROPANETHIOL, 2-METHYL-; C4H10S;

MAT27841; RTECS TZ7660000



CHEMICAL FAMILY: mercaptans



CREATION DATE: Jan 24 1989

REVISION DATE: Mar 16 1999





2. COMPOSITION, INFORMATION ON INGREDIENTS-----------Up to Table of

Contents



COMPONENT: TERT-BUTYL MERCAPTAN



CAS NUMBER: 75-66-1



EC NUMBER (EINECS): 200-890-2



PERCENTAGE: 100.0





3. HAZARDS IDENTIFICATION-----------Up to Table of Contents



NFPA RATINGS (SCALE 0-4): HEALTH=0 FIRE=3 REACTIVITY=0



WHMIS CLASSIFICATION: BD2



EC CLASSIFICATION (CALCULATED):

F Highly Flammable



R 11









EMERGENCY OVERVIEW:



Color: colorless



Physical Form: liquid

Odor: skunk-like odor



Major Health Hazards: No significant target effects reported.



Physical Hazards: Flammable liquid and vapor. Vapor may cause flash fire.



POTENTIAL HEALTH EFFECTS:



INHALATION:

   Short Term Exposure: irritation, lack of sense of smell, nausea, vomiting, diarrhea, difficulty

breathing, headache, symptoms of drunkenness, bluish skin color, lung congestion, kidney

damage, convulsions, coma

   Long Term Exposure: no information on significant adverse effects



SKIN CONTACT:

  Short Term Exposure: irritation

  Long Term Exposure: same as effects reported in short term exposure



EYE CONTACT:

  Short Term Exposure: mild irritation

  Long Term Exposure: no information is available



INGESTION:

   Short Term Exposure: nausea, vomiting, diarrhea, symptoms of drunkenness, bluish skin

color, coma

   Long Term Exposure: no information on significant adverse effects



CARCINOGEN STATUS:

OSHA: N

NTP: N

IARC: N





4. FIRST AID MEASURES-----------Up to Table of Contents

INHALATION:

Remove from exposure immediately. Use a bag valve mask or similar device to perform artificial

respiration (rescue breathing) if needed. Get medical attention.



SKIN CONTACT:

Remove contaminated clothing, jewelry, and shoes immediately. Wash with soap or mild

detergent and large amounts of water until no evidence of chemical remains (at least 15-20

minutes). Get medical attention, if needed.



EYE CONTACT:

Wash eyes immediately with large amounts of water or normal saline, occasionally lifting upper

and lower lids, until no evidence of chemical remains. Get medical attention immediately.



INGESTION: Never make an unconscious person vomit or drink fluids. Give sodium bicarbonate

solution. When vomiting occurs, keep head lower than hips to help prevent aspiration. If person is

unconscious, turn head to side. Get medical attention immediately.



ANTIDOTE: amyl nitrite, inhalation; sodium nitrite, intravenous; pyridoxine, intravenous; urea,

intravenous. CAUTION! Get medical attention immediately.



NOTE TO PHYSICIAN: For ingestion, consider gastric lavage.

5. FIRE FIGHTING MEASURES-----------Up to Table of Contents



FIRE AND EXPLOSION HAZARDS:

Severe explosion hazard. Vapor/air mixtures are explosive. The vapor is heavier than air. Vapors

or gases may ignite at distant ignition sources and flash back.



EXTINGUISHING MEDIA:

regular dry chemical, carbon dioxide, water, regular foam, alcohol resistant foam



Large fires: Use regular foam or flood with fine water spray.



FIRE FIGHTING:

Move container from fire area if it can be done without risk. Cool containers with water spray until

well after the fire is out. Stay away from the ends of tanks. For fires in cargo or storage area: Cool

containers with water from unmanned hose holder or monitor nozzles until well after fire is out. If

this is impossible then take the following precautions: Keep unnecessary people away, isolate

hazard area and deny entry. Let the fire burn. Withdraw immediately in case of rising sound from

venting safety device or any discoloration of tanks due to fire. For tank, rail car or tank truck:

Evacuation radius: 800 meters (1/2 mile). Do not attempt to extinguish fire unless flow of material

can be stopped first. Flood with fine water spray. Do not scatter spilled material with high-

pressure water streams. Cool containers with water spray until well after the fire is out. Apply

water from a protected location or from a safe distance. Avoid inhalation of material or

combustion by-products. Stay upwind and keep out of low areas. Water may be ineffective.



FLASH POINT:

<-20 F (<-29 C) (CC)



FLAMMABILITY CLASS (OSHA):

IB





6. ACCIDENTAL RELEASE MEASURES-----------Up to Table of Contents



OCCUPATIONAL RELEASE:

Avoid heat, flames, sparks and other sources of ignition. Stop leak if possible without personal

risk. Reduce vapors with water spray. Small spills: Absorb with sand or other non-combustible

material. Collect spilled material in appropriate container for disposal. Large spills: Dike for later

disposal. Remove sources of ignition. Keep unnecessary people away, isolate hazard area and

deny entry.





7. HANDLING AND STORAGE-----------Up to Table of Contents



Store and handle in accordance with all current regulations and standards. Subject to storage

regulations: U.S. OSHA 29 CFR 1910.106. Grounding and bonding required. Keep separated

from incompatible substances.





8. EXPOSURE CONTROLS, PERSONAL PROTECTION-----------Up to Table of

Contents



EXPOSURE LIMITS:



TERT-BUTYL MERCAPTAN:

No occupational exposure limits established.



VENTILATION: Provide local exhaust ventilation system. Ventilation equipment should be

explosion-resistant if explosive concentrations of material are present. Ensure compliance with

applicable exposure limits.



EYE PROTECTION: Wear splash resistant safety goggles. Provide an emergency eye wash

fountain and quick drench shower in the immediate work area.



CLOTHING: Wear appropriate chemical resistant clothing.



GLOVES: Wear appropriate chemical resistant gloves.



RESPIRATOR: Under conditions of frequent use or heavy exposure, respiratory protection may

be needed. Respiratory protection is ranked in order from minimum to maximum. Consider

warning properties before use.

Any chemical cartridge respirator with organic vapor cartridge(s).

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.

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.





9. PHYSICAL AND CHEMICAL PROPERTIES-----------Up to Table of Contents



PHYSICAL STATE: liquid



COLOR: colorless



ODOR: skunk-like odor



MOLECULAR WEIGHT: 90.18



MOLECULAR FORMULA: (C-H3)3-C-S-H3-C-S-H



BOILING POINT: 147 F (64 C)



FREEZING POINT: 34 F (1 C)



VAPOR PRESSURE: 304 mmHg



VAPOR DENSITY (air=1): 3.1



SPECIFIC GRAVITY (water=1): 0.8002



WATER SOLUBILITY: slightly soluble



PH: Not available



VOLATILITY: Not available



ODOR THRESHOLD: Not available



EVAPORATION RATE: Not available

COEFFICIENT OF WATER/OIL DISTRIBUTION: Not available



SOLVENT SOLUBILITY:

Soluble: alcohol, ether, liquid hydrogen sulfide





10. STABILITY AND REACTIVITY-----------Up to Table of Contents



REACTIVITY:

Stable at normal temperatures and pressure.



CONDITIONS TO AVOID:

Avoid heat, flames, sparks and other sources of ignition. Containers may rupture or explode if

exposed to heat. Keep out of water supplies and sewers.



INCOMPATIBILITIES:

acids, oxidizing materials



HAZARDOUS DECOMPOSITION:

Thermal decomposition products: hydrogen sulfide, oxides of sulfur, carbon



POLYMERIZATION:

Will not polymerize.





11. TOXICOLOGICAL INFORMATION-----------Up to Table of Contents



TERT-BUTYL MERCAPTAN:



IRRITATION DATA:

84 mg eyes-rabbit



TOXICITY DATA:

22200 ppm/4 hour(s) inhalation-rat LC50; 4729 mg/kg oral-rat LD50



ACUTE TOXICITY LEVEL:

Moderately Toxic: ingestion

Slightly Toxic: inhalation





12. ECOLOGICAL INFORMATION-----------Up to Table of Contents

Not available





13. DISPOSAL CONSIDERATIONS-----------Up to Table of Contents



Subject to disposal regulations: U.S. EPA 40 CFR 262. Hazardous Waste Number(s): D001.

Dispose in accordance with all applicable regulations.





14. TRANSPORT INFORMATION-----------Up to Table of Contents

U.S. DOT 49 CFR 172.101. SHIPPING NAME-UN NUMBER; HAZARD CLASS;

PACKING GROUP; LABEL:

Butyl mercaptans-UN2347; 3; II; Flammable liquid





15. REGULATORY INFORMATION-----------Up to Table of Contents



U.S. REGULATIONS:

 TSCA INVENTORY STATUS: Y



 TSCA 12(b) EXPORT NOTIFICATION: Not listed.



CERCLA SECTION 103 (40CFR302.4): N



SARA SECTION 302 (40CFR355.30): N



SARA SECTION 304 (40CFR355.40): N



SARA SECTION 313 (40CFR372.65): N



SARA HAZARD CATEGORIES, SARA SECTIONS 311/312 (40CFR370.21):

 ACUTE: N

 CHRONIC: N

 FIRE: Y

 REACTIVE: N

 SUDDEN RELEASE: N



OSHA PROCESS SAFETY (29CFR1910.119): N



STATE REGULATIONS:

 California Proposition 65: N



EUROPEAN REGULATIONS:



EC NUMBER (EINECS): 200-890-2



EC RISK AND SAFETY PHRASES:





16. OTHER INFORMATION-----------Up to Table of Contents









Matheson Tri-Gas makes no express or implied warranties, guarantees or representations

regarding the product or the information herein, including but not limited to any implied

warranty of merchantability or fitness for use. Matheson Tri-Gas shall not be liable for any

personal injury, property or other damages of any nature, whether compensatory,

consequential, exemplary, or otherwise, resulting from any publication, use or reliance

upon the information herein.



©Copyright 1984-1999 MDL Information Systems. ©Copyright 2000 Matheson Tri-Gas. All rights

reserved.