MATERIAL SAFETY DATA SHEET

PRODUCT NAME: SOUTH HAMPTON NORMAL PENTANE
MARATHON MSDS NO: 0100SOU016


1. Chemical Product and Company Information

9. Physical and Chemical Properties

2. Composition / Information on Ingredients

10. Stability and Reactivity

3. Hazards Identification

11. Toxicological Information

4. First Aid Measures

12. Ecological Information

5. Fire Fighting Measures

13. Disposal Considerations

6. Accidental Release Measures

14. Transportation Information

7. Handling and Storage

15. Regulatory Information

8. Exposure Control / Personal Protection

16. Other Information


1. CHEMICAL PRODUCT AND COMPANY INFORMATION


PRODUCT NAME:                                MANUFACTURER / DISTRIBUTOR:
 SOUTH HAMPTON NORMAL PENTANE                 SOUTH HAMPTON REFINING COMPANY
                                              P O BOX 1636, HIGHWAY 418 WEST
SYNONYMS:                                     SILSBEE TX 77656
DYNAGAS NORMAL PENTANE; NORMAL PENTANE,
SOUTH HAMPTON REFINING; PENTANE, SOUTH       EMERGENCY PHONE NUMBERS:
HAMPTON REFINING; SOUTH HAMPTON NORMAL        (800)424-9300
PENTANE

CHEM FAMILY:  HYDROCARBON MIXTURE            MSDS INFORMATION: (409)385-1400
CHEM FORMULA:
PRODUCT CODE: PENTANE                        MSDS REVISION DATE: 06/28/1990

INFORMATION SUPPLIED BY: NICHOLAS N. CARTER



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2. COMPOSITION / INFORMATION ON INGREDIENTS

PRODUCT INFORMATION:

SOUTH HAMPTON NORMAL PENTANE (CAS # 109-66-0)


                                              PERCENT RANGE  CAS NUMBER
                                              -------------  ---------------
COMPONENTS:
PENTANE                                                      109-66-0
 COMPONENT LISTED AS N-PENTANE


EXPOSURE GUIDELINES

                                          LIMIT           TYPE      SOURCE
                                    ------------------- --------- ----------
PRODUCT:

SOUTH HAMPTON NORMAL PENTANE        NONE ESTABLISHED

COMPONENTS:

PENTANE                               600.00 PPM        8 HR TWA  ACGIH
                                      750.00 PPM        STEL      ACGIH
                                      600.00 PPM        8 HR TWA  OSHA*
                                      750.00 PPM        STEL      OSHA*
  *  THE MANUFACTURER HAS VOLUNTARILY ELECTED
  TO REFLECT EXPOSURE LIMITS CONTAINED IN
  OSHA'S 1989 AIR CONTAMINANTS STANDARD IN ITS
  MSDS'S, EVEN THOUGH CERTAIN OF THOSE EXPOSURE
  LIMITS WERE VACATED IN 1992.


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3. HAZARDS IDENTIFICATION

*************************** EMERGENCY OVERVIEW ***************************


 WARNING STATEMENT:
   DANGER - EXTREMELY FLAMMABLE.
   DO NOT INDUCE VOMITING IF SWALLOWED.
   FOR INDUSTRIAL USE ONLY.

*******************************************************************************

POTENTIAL HEALTH EFFECTS

EYE:
 THIS PRODUCT MAY BE AN EYE IRRITANT.

SKIN:
 THIS PRODUCT MAY CAUSE SKIN IRRITATION UPON PROLONGED OR REPEATED
 CONTACT.

INHALATION:
 NO DATA AVAILABLE FROM MANUFACTURER.

INGESTION:
 SYSTEMIC EFFECTS:  VARIOUS STUDIES HAVE SHOWN A POSSIBLE ASSOCIATION
 WITH EXPOSURE TO THIS PRODUCT AND THE FOLLOWING:
   RESPIRATORY TRACT IRRITATION.
   CENTRAL NERVOUS SYSTEM DEPRESSION IN HIGH CONCENTRATIONS.
   WEAKNESS AND NUMBNESS IN EXTREMITIES.

CARCINOGEN LISTING:
 NO DATA AVAILABLE FROM MANUFACTURER.

MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE:
 NO DATA AVAILABLE FROM MANUFACTURER.

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4. FIRST AID MEASURES

EYE:
 IF THIS PRODUCT COMES IN CONTACT WITH THE EYES, FLUSH WITH LARGE
 QUANTITIES OF WATER FOR AT LEAST 15 MINUTES AND SEEK IMMEDIATE MEDICAL
 ATTENTION.

SKIN:
 IF THIS PRODUCT COMES IN CONTACT WITH THE SKIN, WASH WITH SOAP AND
 LARGE QUANTITIES OF WATER AND SEEK MEDICAL ATTENTION IF IRRITATION
 FROM CONTACT PERSISTS.

INHALATION:
 IF BREATHING DIFFICULTIES, DIZZINESS, OR LIGHTHEADEDNESS OCCUR WHEN
 WORKING IN AREAS WITH HIGH VAPOR CONCENTRATIONS, VICTIM SHOULD SEEK
 AIR FREE OF VAPORS.  IF VICTIM EXPERIENCES CONTINUED BREATHING
 DIFFICULTIES, ADMINISTER OXYGEN UNTIL MEDICAL ASSISTANCE CAN BE REND-
 ERED.  IF BREATHING STOPS, BEGIN ARTIFICIAL RESPIRATION AND SEEK
 IMMEDIATE MEDICAL ATTENTION.

INGESTION:
 IF THIS PRODUCT IS SWALLOWED, DO NOT INDUCE VOMITING.  SEEK IMMEDIATE
 MEDICAL ADVICE AND/OR ATTENTION.

NOTES TO PHYSICIAN:
 NO DATA AVAILABLE FROM MANUFACTURER.

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5. FIRE FIGHTING MEASURES

FLAMMABLE PROPERTIES:
   FLASH POINT:         < 0 F
   AUTOIGNITION TEMP:   NO DATA AVAILABLE FROM MANUFACTURER.
   EXPLOSIVE LIMITS (% BY VOLUME IN AIR)
       LOWER:           NO DATA AVAILABLE FROM MANUFACTURER.
       UPPER:           NO DATA AVAILABLE FROM MANUFACTURER.


FIRE AND EXPLOSION HAZARDS:
 KEEP WORK AREAS FREE OF HOT METAL SURFACES AND OTHER SOURCES OF
 IGNITION.

EXTINGUISHING MEDIA:
 USE FOAM, CO2, OR DRY CHEMICAL FIRE FIGHTING APPARATUS.

SPECIAL FIRE FIGHTING INSTRUCTIONS:
 THE USE OF SELF-CONTAINED BREATHING APPARATUS IS RECOMMENDED FOR FIRE
 FIGHTERS.  WATER MAY BE UNSUITABLE AS AN EXTINGUISHING AGENT, BUT
 HELPFUL IN KEEPING ADJACENT CONTAINERS COOL.  AVOID SPREADING BURNING
 LIQUID WITH WATER USED FOR COOLING.

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6. ACCIDENTAL RELEASE MEASURES


 KEEP SOURCES OF IGNITION AND HOT METAL SURFACES ISOLATED FROM THE
 SPILL.  FLUSH SPILLED MATERIAL INTO SUITABLE RETAINING AREAS OR CON-
 TAINERS WITH LARGE QUANTITIES OF WATER.  SMALL AMOUNTS OF SPILLED
 MATERIAL MAY BE ABSORBED INTO AN APPROPRIATE ABSORBENT.

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7. HANDLING AND STORAGE


 KEEP PRODUCT CONTAINERS COOL, DRY, AND AWAY FROM SOURCES OF IGNITION.
 USE AND STORE THIS PRODUCT WITH ADEQUATE VENTILATION.

 OTHER PRECAUTIONS:  PERSONNEL SHOULD AVOID INHALATION OF VAPORS.
 PERSONAL CONTACT WITH PRODUCT SHOULD BE AVOIDED.  SHOULD CONTACT BE
 MADE, REMOVE SATURATED CLOTHING AND FLUSH AFFECTED AREAS WITH WATER.

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8. EXPOSURE CONTROL / PERSONAL PROTECTION

ENGINEERING CONTROLS:

 GENERAL MECHANICAL VENTILATION MAY BE SUFFICIENT TO KEEP PRODUCT VAPOR
 CONCENTRATIONS WITHIN SPECIFIED TIME-WEIGHTED TLV RANGES.  IF GENERAL
 VENTILATION PROVES INADEQUATE TO MAINTAIN SAFE VAPOR CONCENTRATIONS,
 SUPPLEMENTAL LOCAL EXHAUST MAY BE REQUIRED.  OTHER SPECIAL PRECAUTIONS
 SUCH AS RESPIRATORY MASKS OR ENVIRONMENTAL CONTAINMENT DEVISES MAY BE
 REQUIRED IN EXTREME CASES.


PERSONAL PROTECTIVE EQUIPMENT

RESPIRATORY PROTECTION:
 THE USE OF RESPIRATORY PROTECTION DEPENDS ON VAPOR CONCENTRATIONS
 ABOVE THE TIME-WEIGHTED TLV:  USE AN NIOSH APPROVED CARTRIDGE RESPIR-
 ATOR OR GAS MASK.

SKIN PROTECTION:
 THE USE OF IMPERMEABLE GLOVES ADVISED TO PREVENT SKIN IRRITATION IN
 SENSITIVE INDIVIDUALS.

EYE PROTECTION:
 SAFETY GLASSES, CHEMICAL GOGGLES, AND/OR FACE SHIELDS ARE RECOMMENDED
 TO SAFEGUARD AGAINST POTENTIAL EYE CONTACT, IRRITATION OR INJURY.

OTHER PROTECTIVE EQUIPMENT:
 IMPERMEABLE APRONS ARE ADVISED WHEN WORKING WITH THIS PRODUCT.  THE
 AVAILABILITY OF EYE WASHES AND SAFETY SHOWERS IN WORK AREAS IS
 RECOMMENDED.

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9. PHYSICAL AND CHEMICAL PROPERTIES


BOILING POINT:               96 - 100 F
MELTING POINT:               NO DATA AVAILABLE FROM MANUFACTURER.
SPECIFIC GRAVITY (H20=1):    LIGHTER THAN WATER
PACKING DENSITY (KG/M3):     NO DATA AVAILABLE FROM MANUFACTURER.
% SOLUBILITY IN WATER:       NEGLIGIBLE
VAPOR DENSITY (AIR=1):       > AIR
VAPOR PRESSURE:              NO DATA AVAILABLE FROM MANUFACTURER.
PH INFORMATION:              NO DATA AVAILABLE FROM MANUFACTURER.
% VOLATILES BY VOL:          100
EVAPORATION RATE:            FASTER THAN ETHER
APPEARANCE:                  CLEAR WITH LITTLE OR NO COLOR
ODOR:                        SLIGHT CHARACTERISTIC ODOR
ODOR THRESHOLD (PPM):        NO DATA AVAILABLE FROM MANUFACTURER.

ADDITIONAL PROPERTIES:
 WEIGHT PER GALLON:  5.22 POUNDS

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10. STABILITY AND REACTIVITY

STABILITY:
 THE MATERIAL IS STABLE AT 70 F, 760MM PRESSURE

CONDITIONS TO AVOID:
 NO DATA AVAILABLE FROM MANUFACTURER.

HAZARDOUS DECOMPOSITION PRODUCTS:
 THERMAL DECOMPOSITION IN THE PRESENCE OF AIR MAY
 YIELD CARBON MONOXIDE AND/OR CARBON DIOXIDE.

INCOMPATIBLE MATERIALS:
 (MATERIALS TO AVOID) - THIS PRODUCT IS INCOMPATIBLE
 WITH STRONG OXIDIZING AGENTS, STRONG ACIDS OR BASES, SELECTED AMINES.

HAZARDOUS POLYMERIZATION:
 WILL NOT OCCUR

CONDITIONS TO AVOID:
 NO DATA AVAILABLE FROM MANUFACTURER.

ADDITIONAL COMMENTS:
 NO DATA AVAILABLE FROM MANUFACTURER.

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11. TOXICOLOGICAL INFORMATION


 NORMAL PENTANE:
   LD50 - DATA NOT AVAILABLE
   LC50 - >6106.6 PPM - MICE

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12. ECOLOGICAL INFORMATION


 NO DATA AVAILABLE FROM MANUFACTURER.

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13. DISPOSAL CONSIDERATIONS


 DISPOSE OF PRODUCT IN ACCORDANCE WITH APPLICABLE LOCAL, COUNTY, STATE
 AND FEDERAL REGULATIONS.

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14. TRANSPORTATION INFORMATION


 DOT FLAMMABILITY CLASSIFICATION:  FLAMMABLE LIQUID
 DOT PROPER SHIPPING NAME:  PENTANE

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15. REGULATORY INFORMATION


 NO DATA AVAILABLE FROM MANUFACTURER.

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16. OTHER INFORMATION

NFPA CLASSIFICATION          HMIS CLASSIFICATION               HAZARD RATING

HEALTH:      1               HEALTH:                           0 - LEAST
FIRE:        4               FIRE:                             1 - SLIGHT
REACTIVITY:  1               REACTIVITY:                       2 - MODERATE
OTHER:                       PERSONAL PROTECTION:              3 - HIGH
                                                               4 - EXTREME

COMMENTS:
 COMMON NAME:  PENTANE
 GENERIC NAME:  VOLATILE SOLVENT
 CHEMICAL NAME:  N-PENTANE

 DISTRIBUTED BY DYNAGAS AND CHEMICALS
   6787 PICCADILLY
   HOUSTON, TX  77061

 HEALTH EMERGENCIES - CALL LOS ANGELES POISON CONTROL CENTER - 24 HOURS
 (213) 664-2121

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Updated: Friday, June 29, 2001