University of California  -  MSDS System              PAGE    1
                                                                        06/10/96
Source of MSDS: VWR SCIENTIFIC CORPORATION

 1. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION

 MANUFACTURER.............:        PREPARATION DATE.:  03/01/91
                                   DATE MSDS PRINTED.:  JUN 11, 1992
   EM SCIENCE
   A DIVISION OF EM INDUSTRIES     INFORMATION PHONE NUMBER.:  609-354-9200
   P.O. BOX 70                     HOURS:  MON. TO FRI. 8:30-5
   480 DEMOCRAT RD.                CHEMTREC EMERGENCY NUMBER:  800-424-9300
   GIBBSTOWN, N.J. 08027           HOURS:  24 HRS A DAY

 CATALOG NUMBER(S):
   CX1600

 CHEMICAL NAME....: CHROMIUM OXIDE
 TRADE NAME.......: CHROMIC OXIDE, CHROME GREEN
 CHEMICAL FAMILY..: OXIDE
 FORMULA..........: CR2O3

 MOLECULAR WEIGHT.: 152.02


 2. COMPOSITION / INFORMATION ON INGREDIENTS

        COMPONENT                          CAS #                 APPR %
 -------------------------------------------------------------------------

 CHROMIUM OXIDE
                                         1308-38-9                100%



 3. HAZARDS IDENTIFICATION

 EMERGENCY OVERVIEW
   HARMFUL IF INHALED OR SWALLOWED.
   IRRITATING TO SKIN, EYES AND MUCOUS MEMBRANES.
 APPEARANCE.................:
   GREEN CRYSTALLINE POWDER




 POTENTIAL HEALTH EFFECTS (ACUTE AND CHRONIC)

 SYMPTOMS OF EXPOSURE:
   DUST INHALATION HARMFUL TO RESPIRATORY PASSAGES AND LUNGS.
   HARMFUL IF SWALLOWED.
                   MSDS (CONTINUED) - CX1600      PAGE # 1






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   IRRITATING ON CONTACT WITH SKIN, EYES OR MUCOUS MEMBRANES.
 MEDICAL COND. AGGRAVATED BY EXPOSURE:
   RESPIRATORY CONDITIONS
 ROUTES OF ENTRY.....................:
   INHALATION, INGESTION
 CARCINOGENICITY.....................:
   IARC CANCER REVIEW: ANIMAL INADEQUATE EVIDENCE


 4. FIRST AID MEASURES

 EMERGENCY FIRST AID:
   GET MEDICAL ASSISTANCE FOR ALL CASES OF OVEREXPOSURE.
   SKIN: WASH THOROUGHLY WITH SOAP AND WATER.
   EYES: IMMEDIATELY FLUSH THOROUGHLY WITH WATER FOR AT LEAST 15
   MINUTES.
   INHALATION: REMOVE TO FRESH AIR; GIVE ARTIFICIAL RESPIRATION IF
   BREATHING HAS STOPPED.
   INGESTION: IF CONSCIOUS, DRINK WATER AND INDUCE VOMITING IMMEDIATELY
   AS DIRECTED BY MEDICAL PERSONNEL. NEVER GIVE ANYTHING BY
   MOUTH TO AN UNCONSCIOUS PERSON.



 5. FIRE FIGHTING MEASURES

 FLASH POINT (F)..........: NONCOMBUSTIBLE
 FLAMMABLE LIMITS LEL (%).: N/A
 FLAMMABLE LIMITS UEL (%).: N/A
 EXTINGUISHING MEDIA......:
   USE ANY SUITABLE FOR ADJACENT MATERIAL.
 FIRE FIGHTING PROCEDURES.:
   WEAR SELF-CONTAINED BREATHING APPARATUS AND PROTECTIVE CLOTHING.
 FIRE & EXPLOSION HAZARDS.:
   NONE INDICATED



 6. ACCIDENTAL RELEASE MEASURES


 SPILL RESPONSE:
   EVACUATE THE AREA OF ALL UNNECESSARY PERSONNEL.
   WEAR SUITABLE PROTECTIVE EQUIPMENT LISTED UNDER EXPOSURE /
   PERSONAL PROTECTION.
   ELIMINATE ANY IGNITION SOURCES UNTIL THE AREA IS DETERMINED TO BE
   FREE FROM EXPLOSION OR FIRE HAZARDS.
   CONTAIN THE RELEASE AND ELIMINATE ITS SOURCE, IF THIS CAN BE DONE
   WITHOUT RISK.
   TAKE UP AND CONTAINERIZE FOR PROPER DISPOSAL AS DESCRIBED UNDER
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   DISPOSAL.
   COMPLY WITH FEDERAL, STATE, AND LOCAL REGULATIONS ON REPORTING
                   MSDS (CONTINUED) - CX1600      PAGE # 2







   RELEASES.  REFER TO REGULATORY INFORMATION FOR REPORTABLE
   QUANTITY AND OTHER REGULATORY DATA.






 7. HANDLING AND STORAGE

 HANDLING & STORAGE:
   KEEP CONTAINER CLOSED AND PROTECTED FROM PHYSICAL DAMAGE.
   STORE IN A WELL-VENTILATED AREA.
   DO NOT BREATHE DUST.
   DO NOT GET IN EYES, ON SKIN, OR ON CLOTHING.



 8. EXPOSURE CONTROLS / PERSONAL PROTECTION

 ENGINEERING CONTROLS AND PERSONAL PROTECTIVE EQUIPMENT:

 VENTILATION, RESPIRATORY PROTECTION, PROTECTIVE CLOTHING, EYE PROTECTION
   RESPIRATORY PROTECTION: IF WORKPLACE EXPOSURE LIMIT(S) OF PRODUCT
   OR ANY COMPONENT IS EXCEEDED (SEE TLV/PEL), A NIOSH/MSHA APPROVED
   AIR SUPPLIED RESPIRATOR IS ADVISED IN ABSENCE OF PROPER
   ENVIRONMENTAL CONTROL.  OSHA REGULATIONS ALSO PERMIT OTHER
   NIOSH/MSHA RESPIRATORS (NEGATIVE PRESSURE TYPE) UNDER SPECIFIED
   CONDITIONS (SEE YOUR SAFETY EQUIPMENT SUPPLIER). ENGINEERING
   AND/OR ADMINISTRATIVE CONTROLS SHOULD BE IMPLEMENTED TO REDUCE
   EXPOSURE.
   MATERIAL MUST BE HANDLED OR TRANSFERRED IN AN APPROVED FUME HOOD
   OR WITH EQUIVALENT VENTILATION.
   PROTECTIVE GLOVES SHOULD BE WORN TO PREVENT SKIN CONTACT
   (NEOPRENE OR EQUIVALENT)
   SAFETY GLASSES WITH SIDE SHIELDS SHOULD BE WORN AT ALL TIMES.

 WORK / HYGENIC PRACTICES:
   WASH THOROUGHLY AFTER HANDLING.
   DO NOT TAKE INTERNALLY.
   EYE WASH AND SAFETY EQUIPMENT SHOULD BE READILY AVAILABLE.

 ---------------------------------------------------------------------------

 EXPOSURE GUIDELINES

                 University of California  -  MSDS System              PAGE    4
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  OSHA - PEL:
                        TWA              STEL                CL
  COMPONENT         PPM     MG/M3    PPM     MG/M3    PPM     MG/M3   SKIN
 ---------------------------------------------------------------------------

 CHROMIUM OXIDE
                   MSDS (CONTINUED) - CX1600      PAGE # 3







                            0.5 CR


 ---------------------------------------------------------------------------

  ACGIH - TLV:
                        TWA              STEL                CL
  COMPONENT       PPM       MG/M3    PPM    MG/M3   PPM       MG/M3   SKIN
 ---------------------------------------------------------------------------

 CHROMIUM OXIDE
                           0.5 CR


 9. PHYSICAL AND CHEMICAL PROPERTIES

 BOILING POINT (C 760 MMHG).: 3000C
 MELTING POINT (C)..........: 2435C
 SPECIFIC GRAVITY (H20 = 1).: 5.22
 VAPOR PRESSURE (MM HG).....: N/A     20C
 PERCENT VOLATILE BY VOL (%): NONE
 VAPOR DENSITY (AIR = 1)....: N/A
 EVAPORATION RATE (BUAC = 1): N/A
 SOLUBILITY IN WATER (%)....: INSOLUBLE
 APPEARANCE.................:
   GREEN CRYSTALLINE POWDER




 10. STABILITY AND REACTIVITY

 STABILITY...............: YES
 HAZARDOUS POLYMERIZATION:
   DOES NOT OCCUR

 HAZARDOUS DECOMPOSITION.:
   NONE INDICATED

 CONDITIONS TO AVOID.....:
   DUSTING

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 MATERIALS TO AVOID......:
   ( )WATER
   ( )ACIDS
   ( )BASES
   ( )CORROSIVES
   ( )OXIDIZERS
   ( )OTHER :



 11. TOXICOLOGICAL INFORMATION

                   MSDS (CONTINUED) - CX1600      PAGE # 4





 TOXICITY DATA:
   NONE ESTABLISHED
 TOXICOLOGICAL FINDINGS:
   TESTS ON LABORATORY ANIMALS INDICATE MATERIAL MAY PRODUCE
   ADVERSE MUTAGENIC EFFECTS AND CAUSE TUMORS.
   CITED IN REGISTRY OF TOXIC EFFECTS OF SUBSTANCES (RTECS)



 12. DISPOSAL CONSIDERATIONS

 EPA WASTE NUMBERS: D007
 TREATMENT:
   SPECIFIED TECHNOLOGY - CONTACT YOUR LOCAL PERMITTED WASTE
   DISPOSAL SITE (TSD) FOR PERMISSIBLE TREATMENT SITES.
   ALWAYS CONTACT A PERMITTED WASTE DISPOSER (TSD) TO ASSURE
   COMPLIANCE WITH ALL CURRENT LOCAL, STATE AND FEDERAL REGULATIONS.





 13. TRANSPORT INFORMATION

 DOT PROPER SHIPPING NAME...:
   (NON-REGULATED)
 DOT ID NUMBER..............: (NONE)



 14. REGULATORY INFORMATION

 TSCA INVENTORY.............:
   THE CAS NUMBER OF THIS PRODUCT IS LISTED ON THE TSCA INVENTORY.


                         SARA                 SARA             CERCLA
  COMPONENT              EHS                 EHS TPQ             RQ
                 University of California  -  MSDS System              PAGE    6
                                                                        06/10/96
                        (302)                 (LBS)            (LBS)
 --------------------------------------------------------------------------

 CHROMIUM OXIDE



 --------------------------------------------------------------------------

                        OSHA               SARA              DEMINIMIS
  COMPONENT          FLOOR LIST            313             FOR SARA 313
                                                                (%)
 --------------------------------------------------------------------------

                   MSDS (CONTINUED) - CX1600      PAGE # 5







 CHROMIUM OXIDE
                         Y


 15. OTHER INFORMATION

 COMMENTS:
   NONE
 NFPA HAZARD RATINGS:
   HEALTH         : 2
   FLAMMABILITY   : 0
   REACTIVITY     : 0
   SPECIAL HAZARDS:

 REVISION HISTORY:
   12/01/84  10/27/87  12/13/90


  = REVISED SECTION
   N/A = NOT AVAILABLE
   N/E = NONE ESTABLISHED

   THE STATEMENTS CONTAINED HEREIN ARE OFFERED FOR INFORMATIONAL PURPOSES
   ONLY AND ARE BASED UPON TECHNICAL DATA THAT EM SCIENCE BELIEVES TO BE
   ACCURATE. IT IS INTENDED FOR USE ONLY BY PERSONS HAVING THE NECESSARY
   TECHNICAL SKILL AND AT THEIR OWN DESCRETION AND RISK. SINCE CONDITIONS
   AND MANNER OF USE ARE OUTSIDE OUR CONTROL, WE MAKE NO WARRANTY, EXPRESS
   OR IMPLIED, OF MERCHANTABILITY, FITNESS OR OTHERWISE.


   PORTIONS COPYRIGHT ARIEL RESEARCH CORPORATION, 1991.
   RESTRICTED USE CONDITIONS APPLY. SELECTED REGULATORY
   INFORMATION IN THIS MSDS HAS BEEN DERIVED FROM ARIEL
   RESEARCH CORPORATION'S INTERNATIONAL CHEMICAL REGULATORY
                 University of California  -  MSDS System              PAGE    7
                                                                        06/10/96
   MONITORING SYSTEM (ICRMS). USE OF THIS DATA IS PROVIDED
   SUBJECT TO THE TERMS OF THE LICENSE AGREEMENT BETWEEN EM
   INDUSTRIES AND ARIEL RESEARCH CORPORATION. FURTHER
   DISTRIBUTION IS PROHIBITED WITHOUT AUTHORIZATION.


                         MSDS - CX1600      PAGE # 6