NTP CHEMICAL REPOSITORY (RADIAN CORPORATION, AUGUST 29, 1991)
                                  POLYSTYRENE


-IDENTIFIERS
 ===========

*CATALOG ID NUMBER: 002084

*CAS NUMBER:    9003-53-6

*BASE CHEMICAL NAME: POLYSTYRENE

*PRIMARY NAME: POLYSTYRENE

*CHEMICAL FORMULA: (C8H8)n

*STRUCTURAL FORMULA: (CH2CH(C6H5))n

*WLN: /1U1R/

*SYNONYMS:
  BENZENE, ETHENYL-, HOMOPOLYMER
  A 3-80
  AFCOLENE
  ATACTIC POLYSTYRENE
  BACTOLATEX
  BAKELITE SMD 3500
  BASF III
  BDH 29-790
  BEXTRENE XL 750
  BICOLASTIC A 75
  BICOLENE H
  BIO-BEADS S-S 2
  BP-KLP BSB-S
  BUSTREN K %00
  BUSTREN U 825
  BUSTREN Y 825
  CADCO 0115
  CARINEX GP
  COPAL Z
  COSDEN 550
  DENKA QP3
  DIAREX 43G
  DORVON
  DOW 456
  DYLENE 8
  DYLITE F
  ESBRITE 2
  ESTYRENE G 15
  FOSTER GRANT 834
  GEDEX
  HOSTYREN N
  KB POLYMER
  LACQREN 506
  LUSTREX HP 77
  POLIGOSTYRENE
  OWISPOL GF
  PELASPAN 333
  PICCOLASTIC A
  POLYFLEX
  POLYSTROL D
  POLYSTRENE BEADS
  PRINTELS
  REXOLITE 1422
  RHODOLINE
  SHELL 300
  STERNITE 30
  STYRAFOIL
  STYRAGEL
  STYRENE POLYMERS
  STYREX C
  STYROCELL PM
  STYROFOAM
  STYRON
  TOPOREX 500
  TROLITUL
  TRYCITE 1000
  UBATOL U 2001
  UN 2211
  UP 1
  UP 2
  VESTOLEN P 5232G
  VESTYRON
  VINAMUL N 710
  VINYLBENZENE POLYMER
  X 600


-PHYSICAL CHEMICAL DATA
 ======================

*PHYSICAL DESCRIPTION: LITERATURE: White powder
                       REPOSITORY: Not available

*MOLECULAR WEIGHT: 50,000-300,000

*SPECIFIC GRAVITY: 1.04-1.65 @ 20/4 C

*DENSITY: Not available

*MP (DEG C): 240 C

*BP (DEG C): Not available

*SOLUBILITIES:
       WATER : Not available

        DMSO : Not available

 95% ETHANOL : Not available

    METHANOL : Not available

     ACETONE : Not available

     TOLUENE : Not available

 OTHER SOLVENTS: Tetrahydrofuran: Soluble
               : Toluene: Soluble
               : Methylene chloride: Soluble
               : Pyridine: Soluble
   BENZENE: Soluble

*VOLATILITY:
    Vapor pressure: Not available
    Vapor density : Not available

*FLAMMABILITY(FLASH POINT):
  Flash point data for this compound are not available.  It is probably
  combustible.  Fires involving this material can be controlled with a
  dry chemical, carbon dioxide or Halon extinguisher.  The autoignition
  temperature is 427 C (800 F).

*UEL: Not available                          LEL: Not available

*REACTIVITY:
  This compound is incompatible with strong oxidizing agents.  It is also
  attacked by hydrocarbon solvents.

*STABILITY:
  This material has an average shelf-life of 6 months.  It turns yellow on
  exposure to light.  Solutions of this chemical in water, DMSO, 95% ethanol
  or acetone should be stable for 24 hours under normal lab conditions (RAD).

*OTHER PHYSICAL DATA:
  Refractive index: 1.60 @ 25 C
  Highly resistant to biological decay.
  Dielectric constant at 100 megacycles: 2.4-2.65


-TOXICITY
 ========

*NIOSH REGISTRY NUMBER: WL6475000

*TOXICITY:
        typ. dose    mode     specie      amount     units     other
          LC50       ihl       mus         120       mg/m3/10M

*AQTX/TLM96: Not available

*SAX TOXICITY EVALUATION:
  THR = An experimental equivocal tumorigenic agent, carcinogen. HIGH via
        inhalation.

*CARCINOGENICITY:
  Tumorigenic Data:
    TDLo: imp-rat  19 mg/kg
  Review: IARC Cancer Review: Animal Inadequate Evidence
          IARC: Not classifiable as a human carcinogen (Group 3) [610]

*MUTATION DATA:
       test          lowest dose
    -----------   -----------------
    Not available

*TERATOGENICITY (Reproductive Effects Data): Not available

*STANDARDS, REGULATIONS & RECOMMENDATIONS:
  OSHA: None
  ACGIH: None
  NIOSH Criteria Document: None
  NFPA Hazard Rating: Health (H): None
                      Flammability (F): None
                      Reactivity (R): None

*OTHER TOXICITY DATA:
  Review: Toxicology Review
  Status: Reported in EPA TSCA Inventory, 1983
          Meets criteria for proposed OSHA Medical Records Rule


-OTHER DATA (Regulatory)
 =======================

*PROPER SHIPPING NAME (IATA): Polystyrene beads, expandable

*UN/ID NUMBER: UN2211

*HAZARD CLASS: 9             SUBSIDIARY RISK: None    PACKING GROUP: III

*LABELS REQUIRED: Miscellaneous

*PACKAGING: PASSENGER: PKG. INSTR.: 908             MAXIMUM QUANTITY: 100 kg
            CARGO    : PKG. INSTR.: 908             MAXIMUM QUANTITY: 200 kg

*SPECIAL PROVISIONS: None

*USES:
  This material is used in the manufactyure of plastics; synthetic rubber;
  resins; insulation; packaging; refrigerator doors; machine housings;
  electrical equipment; toys; thermal insulation; radiator leak stopper
  (as spheres); and as ion-exchange resin.

-HANDLING PROCEDURES
 ===================

*ACUTE/CHRONIC HAZARDS:
  This material may be irritating to eyes and mucous membranes.  In high
  concentrations it may be narcotic.  When heated to decomposition it emits
  acrid smoke and fumes.

*MINIMUM PROTECTIVE CLOTHING: Not available

*RECOMMENDED GLOVE MATERIALS:
 Recommended Glove Type For Use With Neat (Undiluted) Chemical:
      Recommendations based on permeation test results are made for handling
 the neat (undiluted) chemical.  If this chemical makes direct contact with
 your glove, or if a tear, puncture or hole develops, replace them at once.

 Suggested Glove Type(s) (RAD): No information available

*RECOMMENDED RESPIRATOR:
      Where the neat test chemical is weighed and diluted, wear a NIOSH-
 approved half face respirator equipped with an organic vapor/acid gas
 cartridge (specific for organic vapors, HCl, acid gas and SO2) with a
 dust/mist filter.

*STORAGE PRECAUTIONS:
      You should store this chemical under refrigerated conditions
 and away from all organic compounds.

*OTHER:
      Since this chemical is a known or suspected carcinogen you should contact
 a physician for advice regarding the possible long term health effects and
 potential recommendation for medical monitoring.  Recommendations from the
 physician will depend upon the specific compound, the exposure level and the
 route of exposure.

*SPILLS AND LEAKAGE:
      If you spill this chemical, FIRST REMOVE ALL SOURCES OF IGNITION, then
 dampen the solid spill material with toluene,  then transfer the dampened
 material to a suitable container.  Use absorbent paper dampened with toluene
 to pick up any remaining material.  Your contaminated clothing and absorbent
 paper should be sealed in a vapor-tight plastic bag for eventual disposal.
 Solvent-wash all contaminated surfaces with toluene followed by washing with
 a soap and water solution.  Do not reenter the contaminated area until
 the Safety Officer (or other responsible person) has verified that the area
 has been properly cleaned.

*DISPOSAL AND WASTES TREATMENT:
 Not available


-EMERGENCY PROCEDURES
 ====================

*SKIN CONTACT:
      IMMEDIATELY flood affected skin with water while removing and isolating
 all contaminated clothing.  Gently wash all affected skin areas thoroughly
 with soap and water.
      If symptoms such as redness or irritation develop, IMMEDIATELY call a
 physician and be prepared to transport the victim to a hospital for treatment.

*INHALATION:
      IMMEDIATELY leave the contaminated area; take deep breaths of fresh air.
 If symptoms (such as wheezing, coughing, shortness of breath, or burning in
 the mouth, throat, or chest) develop, call a physician and be prepared to
 transport the victim to a hospital.
      Provide proper respiratory protection to rescuers entering an unknown
 atmosphere.  Whenever possible, Self-Contained Breathing Apparatus (SCBA)
 should be used; if not available, use a level of protection greater than or
 equal to that advised under Respirator Recommendation.

*EYE CONTACT:
      First check the victim for contact lenses and remove if present.  Flush
 victim's eyes with water or normal saline solution for 20 to 30 minutes while
 simultaneously calling a hospital or poison control center.
      Do not put any ointments, oils, or medication in the victim's eyes without
 specific instructions from a physician.
      IMMEDIATELY transport the victim after flushing eyes to a hospital even if
 no symptoms (such as redness or irritation) develop.

*INGESTION:
      DO NOT INDUCE VOMITING.  If the victim is conscious and not convulsing,
 give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a
 hospital or poison control center.  Be prepared to transport the victim to a
 hospital if advised by a physician.
      If the victim is convulsing or unconscious, do not give anything by mouth,
 ensure that the victim's airway is open and lay the victim on his/her side with
 the head lower than the body.  DO NOT INDUCE VOMITING.  IMMEDIATELY transport
 the victim to a hospital.

*SYMPTOMS:
  Symptoms of exposure to this compound may include skin, eyes and mucous
  membranes.


-SOURCES
 =======
*SOURCES:
 Lewis, R.J., Sr. and R.L. Tatken, Eds.  Registry of Toxic Effects
    of Chemical Substances.  Microfiche Ed.  National Institute for
    Occupational Safety and Health.  Cincinnati, OH.  Quarterly
    Updates.  WL6475000.

 Windholz, M., Ed.  The Merck Index.  10th Ed.  Merck and Co.
    Rahway, NJ.  1983.  p. 1270, #8732.

 Sax, N.I.  Dangerous Properties of Industrial Materials.  6th Ed.
    Van Nostrand Reinhold.  New York.  1984.  p. 2474.

 Information Handling Services.  Material Safety Data Sheets
    Service.  Microfiche Ed.  Bimonthly Updates.  #5833-679, B-03.

 Hawley, G.G., Ed.  The Condensed Chemical Dictionary.  10th Ed.
    Van Nostrand Reinhold.  New York.  1981.  p. 838.

 U.S. Environmental Protection Agency, Office of Toxic Substances.
    Toxic Substances Control Act Chemical Substances Inventory,
    Initial Inventory.  6 Vols.  U.S. Environmental Protection
    Agency.  Washington, D.C.  1979.  Listed.

 Occupational Health Services, Inc.  Hazardline.  Occupational
    Health Services, Inc.  New York.  1983.  Listed.

 Oak Ridge National Laboratory.  Environmental Mutagen Information
    Center (EMIC), Bibliographic Data Base.  Oak Ridge National
    Laboratory.  Oak Ridge, TN.  Not listed.

 Oak Ridge National Laboratory.  Environmental Teratogen Information
    Center (ETIC), Bibliographic Data Base.  Oak Ridge National
    Laboratory.  Oak Ridge, TN.  Not listed.

 Lenga, Robert E.  The Sigma-Aldrich Library of Chemical Safety Data.
    Edition 1.  Sigma-Aldrich Corporation.  Milwaukee, WI.  1985.
    p. 1524C.

 Aldrich Chemical Company.  Aldrich Catalog/Handbook of Fine
    Chemical.  Aldrich Chemical Co., Inc.  Milwaukee, WI.
    1986.  p. 1114, #20,252-5.

 Occupational Safety and Health Administration.  Tentative
    OSHA Listing of Confirmed and Suspected Carcinogens by
    Category.  Occupational Safety and Health Administration.
    Washington, DC.  1979.  Not listed.

 International Agency for Research on Cancer, World Health
    Organization.  IARC Monographs on the Evaluation of
    Carcinogenic Risk of Chemicals to Man.  International
    Agency for Research on Cancer.  Geneva.  1971-1982.  Vol. 19, p. 245.

 Clayton, G.D. and F.E. Clayton, Eds.  Patty's Industrial Hygiene
    and Toxicology.  Vol. 2.  Third Revised Edition.  John Wiley
    and Sons.  New York.  1981.  Vol. IIc, pp. 4337-4340.

 [610] Clansky, Kenneth B., Ed.  Suspect Chemicals Sourcebook:  A Guide to
          Industrial Chemicals Covered Under Major Federal Regulatory and
          Advisory Programs.  Roytech Publications, Inc.  Burlingame, CA.
          1990.  Section 3, p. 127.

 [620] United States National Toxicology Program.  Chemical Status Report.
          NTP Chemtrack System.  Research Triangle Park, NC.  November 6, 1990.
          Not listed.

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