University of California  -  MSDS System              PAGE    1
                                                                        05/28/97
Source of MSDS: VWR SCIENTIFIC CORPORATION

          J.T.BAKER INC.  222 RED SCHOOL LANE, PHILLIPSBURG, NJ  08865
              M A T E R I A L   S A F E T Y   D A T A   S H E E T
                 24-HOUR EMERGENCY TELEPHONE -- (908) 859-2151
     CHEMTREC # (800) 424-9300 -- NATIONAL RESPONSE CENTER # (800) 424-8802

D8904 -05                          DRIERITE(R)                           PAGE:
EFFECTIVE:  12/08/93                                          ISSUED: 01/15/94

J.T.BAKER INC., 222 RED SCHOOL LANE, PHILLIPSBURG, NJ 08865

==============================================================================
                     SECTION I - PRODUCT IDENTIFICATION
==============================================================================

PRODUCT NAME:    DRIERITE(R)
COMMON SYNONYMS: CALCIUM SULFATE, ANHYDROUS
CHEMICAL FAMILY: CALCIUM COMPOUNDS
FORMULA:         CASO4
FORMULA WT.:     N/A
CAS NO.:         7778-18-9
NIOSH/RTECS NO.: N/A
PRODUCT USE:     LABORATORY REAGENT
PRODUCT CODES:   L056

==============================================================================
                        PRECAUTIONARY LABELING
==============================================================================
BAKER SAF-T-DATA* SYSTEM
                      HEALTH        -   1   SLIGHT
                      FLAMMABILITY  -   0   NONE
                      REACTIVITY    -   0   NONE
                      CONTACT       -   1   SLIGHT

LABORATORY PROTECTIVE EQUIPMENT

GOGGLES; LAB COAT

                         U.S. PRECAUTIONARY LABELING

                                   CAUTION
MAY CAUSE IRRITATION.
DURING USE AVOID CONTACT WITH EYES, SKIN, CLOTHING.  WASH THOROUGHLY AFTER
HANDLING.  WHEN NOT IN USE KEEP IN TIGHTLY CLOSED CONTAINER.

                             INTERNATIONAL LABELING

AVOID CONTACT WITH EYES.  AFTER CONTACT WITH SKIN, WASH IMMEDIATELY WITH
PLENTY OF WATER.  KEEP CONTAINER TIGHTLY CLOSED.

SAF-T-DATA* STORAGE COLOR CODE: ORANGE (GENERAL STORAGE)

                              CONTINUED ON PAGE:  2


                 University of California  -  MSDS System              PAGE    2
                                                                        05/28/97






          J.T.BAKER INC.  222 RED SCHOOL LANE, PHILLIPSBURG, NJ  08865
              M A T E R I A L   S A F E T Y   D A T A   S H E E T
                 24-HOUR EMERGENCY TELEPHONE -- (908) 859-2151
     CHEMTREC # (800) 424-9300 -- NATIONAL RESPONSE CENTER # (800) 424-8802

D8904 -05                          DRIERITE(R)                           PAGE:
EFFECTIVE:  12/08/93                                          ISSUED: 01/15/94

==============================================================================
                      SECTION II - COMPONENTS
==============================================================================

COMPONENT                         CAS NO.     WEIGHT %   OSHA/PEL   ACGIH/TLV
CALCIUM SULFATE, ANHYDROUS        7778-18-9   98-100     15   MG/M  10   MG/M

DRIERITE(R) IS A REGISTERED TRADEMARK OF W.A. HAMMOND DRIERITE CO.

==============================================================================
                   SECTION III - PHYSICAL DATA
==============================================================================

BOILING POINT: N/A                           VAPOR PRESSURE (MMHG): N/A

MELTING POINT: 1450 C (2642 F)               VAPOR DENSITY (AIR=1): N/A
  (AT 760 MM HG)

SPECIFIC GRAVITY: 2.96                       EVAPORATION RATE: N/A
   (H2O=1)

SOLUBILITY(H20): SLIGHT (0.1-1%)             % VOLATILES BY VOLUME: 0
                                                (21 C)

PH: N/A

ODOR THRESHOLD (P.P.M.): N/A                PHYSICAL STATE: SOLID

COEFFICIENT WATER/OIL DISTRIBUTION: N/A

APPEARANCE & ODOR: CRYSTALS. ODORLESS.

==============================================================================
              SECTION IV - FIRE AND EXPLOSION HAZARD DATA
==============================================================================

FLASH POINT (CLOSED CUP): N/A

AUTOIGNITION TEMPERATURE: N/A

FLAMMABLE LIMITS:   UPPER - N/A        LOWER - N/A

                 University of California  -  MSDS System              PAGE    3
                                                                        05/28/97
FIRE EXTINQUISHING MEDIA
    USE EXTINGUISHING MEDIA APPROPRIATE FOR SURROUNDING FIRE.

                              CONTINUED ON PAGE:  3






          J.T.BAKER INC.  222 RED SCHOOL LANE, PHILLIPSBURG, NJ  08865
              M A T E R I A L   S A F E T Y   D A T A   S H E E T
                 24-HOUR EMERGENCY TELEPHONE -- (908) 859-2151
     CHEMTREC # (800) 424-9300 -- NATIONAL RESPONSE CENTER # (800) 424-8802

D8904 -05                          DRIERITE(R)                           PAGE:
EFFECTIVE:  12/08/93                                          ISSUED: 01/15/94

==============================================================================
         SECTION IV - FIRE AND EXPLOSION HAZARD DATA (CONTINUED)
==============================================================================

SPECIAL FIRE-FIGHTING PROCEDURES
    FIREFIGHTERS SHOULD WEAR PROPER PROTECTIVE EQUIPMENT AND SELF-CONTAINED
    BREATHING APPARATUS WITH FULL FACEPIECE OPERATED IN POSITIVE PRESSURE
    MODE.

UNUSUAL FIRE & EXPLOSION HAZARDS
    NONE IDENTIFIED.

TOXIC GASES PRODUCED
    SULFUR DIOXIDE

EXPLOSION DATA-SENSITIVITY TO MECHANICAL IMPACT
    NONE IDENTIFIED.

EXPLOSION DATA-SENSITIVITY TO STATIC DISCHARGE
    NONE IDENTIFIED.

==============================================================================
                      SECTION V - HEALTH HAZARD DATA
==============================================================================

THRESHOLD LIMIT VALUE (TLV/TWA):  10 MG/M

SHORT-TERM EXPOSURE LIMIT (STEL): NOT ESTABLISHED

PERMISSIBLE EXPOSURE LIMIT (PEL): NOT ESTABLISHED

TOXICITY OF COMPONENTS

NO INFORMATION IS AVAILABLE
CARCINOGENICITY:   NTP: NO    IARC: NO     Z LIST: NO   OSHA REG: NO

CARCINOGENICITY
    NONE IDENTIFIED.
                 University of California  -  MSDS System              PAGE    4
                                                                        05/28/97

REPRODUCTIVE EFFECTS
    NONE IDENTIFIED.

                              CONTINUED ON PAGE:  4









          J.T.BAKER INC.  222 RED SCHOOL LANE, PHILLIPSBURG, NJ  08865
              M A T E R I A L   S A F E T Y   D A T A   S H E E T
                 24-HOUR EMERGENCY TELEPHONE -- (908) 859-2151
     CHEMTREC # (800) 424-9300 -- NATIONAL RESPONSE CENTER # (800) 424-8802

D8904 -05                          DRIERITE(R)                           PAGE:
EFFECTIVE:  12/08/93                                          ISSUED: 01/15/94

==============================================================================
                 SECTION V - HEALTH HAZARD DATA (CONTINUED)
==============================================================================

EFFECTS OF OVEREXPOSURE

    INHALATION:      IRRITATION OF UPPER RESPIRATORY TRACT

    SKIN CONTACT:    NONE IDENTIFIED

    EYE CONTACT:     IRRITATION

    SKIN ABSORPTION: NONE IDENTIFIED

    INGESTION:       NONE IDENTIFIED

    CHRONIC EFFECTS: NONE IDENTIFIED

TARGET ORGANS
    NONE IDENTIFIED

MEDICAL CONDITIONS GENERALLY AGGRAVATED BY EXPOSURE
    NONE IDENTIFIED

PRIMARY ROUTES OF ENTRY
    INHALATION, EYE CONTACT

EMERGENCY AND FIRST AID PROCEDURES

    INGESTION:    IF SWALLOWED AND THE PERSON IS CONSCIOUS, IMMEDIATELY GIVE
                  LARGE AMOUNTS OF WATER.  GET MEDICAL ATTENTION.

    INHALATION:   IF A PERSON BREATHES IN LARGE AMOUNTS, MOVE THE EXPOSED
                  PERSON TO FRESH AIR.
                 University of California  -  MSDS System              PAGE    5
                                                                        05/28/97

    SKIN CONTACT: IN CASE OF CONTACT, IMMEDIATELY WASH SKIN WITH PLENTY OF
                  SOAP AND WATER FOR AT LEAST 15 MINUTES.

    EYE CONTACT:  IN CASE OF EYE CONTACT, IMMEDIATELY FLUSH WITH PLENTY OF
                  WATER FOR AT LEAST 15 MINUTES.

               SARA/TITLE III HAZARD CATEGORIES AND LISTS

ACUTE: YES CHRONIC: YES FLAMMABILITY: NO  PRESSURE: NO  REACTIVITY: NO

EXTREMELY HAZARDOUS SUBSTANCE: NO

                              CONTINUED ON PAGE:  5




          J.T.BAKER INC.  222 RED SCHOOL LANE, PHILLIPSBURG, NJ  08865
              M A T E R I A L   S A F E T Y   D A T A   S H E E T
                 24-HOUR EMERGENCY TELEPHONE -- (908) 859-2151
     CHEMTREC # (800) 424-9300 -- NATIONAL RESPONSE CENTER # (800) 424-8802

D8904 -05                          DRIERITE(R)                           PAGE:
EFFECTIVE:  12/08/93                                          ISSUED: 01/15/94

==============================================================================
                 SECTION V - HEALTH HAZARD DATA (CONTINUED)
==============================================================================

CERCLA HAZARDOUS SUBSTANCE:    NO
SARA 313 TOXIC CHEMICALS:      NO
TSCA INVENTORY:                YES

==============================================================================
                        SECTION VI - REACTIVITY DATA
==============================================================================

STABILITY: STABLE                   HAZARDOUS POLYMERIZATION: WILL NOT OCCUR

CONDITIONS TO AVOID:    AIR, MOISTURE, DUSTING

INCOMPATIBLES:          STRONG ACIDS, ALUMINUM

DECOMPOSITION PRODUCTS: OXIDES OF SULFUR

==============================================================================
                  SECTION VII - SPILL & DISPOSAL PROCEDURES
==============================================================================

STEPS TO BE TAKEN IN THE EVENT OF A SPILL OR DISCHARGE
    WEAR SUITABLE PROTECTIVE CLOTHING.  CAREFULLY SWEEP UP AND REMOVE.

DISPOSAL PROCEDURE
    DISPOSE IN ACCORDANCE WITH ALL APPLICABLE FEDERAL, STATE, AND LOCAL
    ENVIRONMENTAL REGULATIONS.
                 University of California  -  MSDS System              PAGE    6
                                                                        05/28/97

==============================================================================
                SECTION VIII - INDUSTRIAL PROTECTIVE EQUIPMENT
==============================================================================

VENTILATION:            USE GENERAL OR LOCAL EXHAUST VENTILATION TO MEET TLV
                        REQUIREMENTS.

RESPIRATORY PROTECTION: NONE REQUIRED WHERE ADEQUATE VENTILATION CONDITIONS
                        EXIST.  IF AIRBORNE CONCENTRATION EXCEEDS TLV, A
                        DUST/MIST RESPIRATOR IS RECOMMENDED.  IF CONCENTRATION
                        EXCEEDS CAPACITY OF RESPIRATOR, A SELF-CONTAINED
                        BREATHING APPARATUS IS ADVISED.

EYE/SKIN PROTECTION:    SAFETY GOGGLES, RUBBER GLOVES ARE RECOMMENDED.

                              CONTINUED ON PAGE:  6





          J.T.BAKER INC.  222 RED SCHOOL LANE, PHILLIPSBURG, NJ  08865
              M A T E R I A L   S A F E T Y   D A T A   S H E E T
                 24-HOUR EMERGENCY TELEPHONE -- (908) 859-2151
     CHEMTREC # (800) 424-9300 -- NATIONAL RESPONSE CENTER # (800) 424-8802

D8904 -05                          DRIERITE(R)                           PAGE:
EFFECTIVE:  12/08/93                                          ISSUED: 01/15/94

==============================================================================
              SECTION IX - STORAGE AND HANDLING PRECAUTIONS
==============================================================================

SAF-T-DATA* STORAGE COLOR CODE: ORANGE (GENERAL STORAGE)

STORAGE REQUIREMENTS
    KEEP CONTAINER TIGHTLY CLOSED.  SUITABLE FOR ANY GENERAL CHEMICAL STORAGE
    AREA.

==============================================================================
         SECTION X - TRANSPORTATION DATA AND ADDITIONAL INFORMATION
==============================================================================

DOMESTIC (D.O.T.)

PROPER SHIPPING NAME:  CHEMICALS, N.O.S. (NON-REGULATED)

INTERNATIONAL (I.M.O.)

PROPER SHIPPING NAME:  CHEMICALS, N.O.S. (NON-REGULATED)
                 MARINE POLLUTANTS: NO

AIR (I.C.A.O.)

PROPER SHIPPING NAME:  CHEMICALS, N.O.S. (NON-REGULATED)
                 University of California  -  MSDS System              PAGE    7
                                                                        05/28/97

U.S. CUSTOMS HARMONIZATION NUMBER: 38220000000

==============================================================================

NOTE:  WHEN HANDLING LIQUID PRODUCTS, SECONDARY PROTECTIVE CONTAINERS MUST BE
USED FOR CARRYING.
-N/A = NOT APPLICABLE, OR NOT AVAILABLE;
N/E = NOT ESTABLISHED.-
THE INFORMATION IN THIS MATERIAL SAFETY DATA SHEET MEETS THE
REQUIREMENTS OF THE UNITED STATES OCCUPATIONAL SAFETY AND HEALTH ACT AND
REGULATIONS PROMULGATED THEREUNDER (29 CFR 1910.1200 ET. SEQ.) AND THE
CANADIAN WORKPLACE HAZARDOUS MATERIALS INFORMATION SYSTEM.  THIS DOCUMENT
IS INTENDED ONLY AS A GUIDE TO THE APPROPRIATE PRECAUTIONARY HANDLING OF
THE MATERIAL BY A PERSON TRAINED IN, OR SUPERVISED BY A PERSON TRAINED
IN, CHEMICAL HANDLING.  THE USER IS RESPONSIBLE FOR DETERMINING THE
PRECAUTIONS AND DANGERS OF THIS CHEMICAL FOR HIS OR HER PARTICULAR
APPLICATION.  DEPENDING ON USAGE, PROTECTIVE CLOTHING INCLUDING EYE AND
FACE GUARDS AND RESPIRATORS MUST BE USED TO AVOID CONTACT WITH MATERIAL
OR BREATHING CHEMICAL VAPORS/FUMES.
EXPOSURE TO THIS PRODUCT MAY HAVE SERIOUS ADVERSE HEALTH EFFECTS.  THIS
CHEMICAL MAY INTERACT WITH OTHER SUBSTANCES.  SINCE THE POTENTIAL USES
                              CONTINUED ON PAGE:  7



          J.T.BAKER INC.  222 RED SCHOOL LANE, PHILLIPSBURG, NJ  08865
              M A T E R I A L   S A F E T Y   D A T A   S H E E T
                 24-HOUR EMERGENCY TELEPHONE -- (908) 859-2151
     CHEMTREC # (800) 424-9300 -- NATIONAL RESPONSE CENTER # (800) 424-8802

D8904 -05                          DRIERITE(R)                           PAGE:
EFFECTIVE:  12/08/93                                          ISSUED: 01/15/94

==============================================================================

ARE SO VARIED, BAKER CANNOT WARN OF ALL OF THE POTENTIAL DANGERS OF USE
OR INTERACTION WITH OTHER CHEMICALS OR MATERIALS.  BAKER WARRANTS THAT
THE CHEMICAL MEETS THE SPECIFICATIONS SET FORTH ON THE LABEL.
BAKER DISCLAIMS ANY OTHER WARRANTIES, EXPRESSED OR IMPLIED WITH REGARD
TO THE PRODUCT SUPPLIED HEREUNDER, ITS MERCHANTABILITY OR ITS FITNESS
FOR A PARTICULAR PURPOSE.
THE USER SHOULD RECOGNIZE THAT THIS PRODUCT CAN CAUSE SEVERE INJURY AND
EVEN DEATH, ESPECIALLY IF IMPROPERLY HANDLED OR THE KNOWN DANGERS OF USE
ARE NOT HEEDED.  READ ALL PRECAUTIONARY INFORMATION.  AS NEW DOCUMENTED
GENERAL SAFETY INFORMATION BECOMES AVAILABLE, BAKER WILL PERIODICALLY
REVISE THIS MATERIAL SAFETY DATA SHEET.
NOTE: CHEMTREC, CANUTEC, AND NATIONAL RESPONSE CENTER EMERGENCY TELEPHONE
NUMBERS ARE TO BE USED ONLY IN THE EVENT OF CHEMICAL EMERGENCIES INVOLVING
A SPILL, LEAK, FIRE, EXPOSURE, OR ACCIDENT INVOLVING CHEMICALS. ALL
NON-EMERGENCY QUESTIONS SHOULD BE DIRECTED TO CUSTOMER SERVICE
(1-800-JTBAKER) FOR ASSISTANCE.
---
COPYRIGHT 1994  J.T.BAKER INC.
* TRADEMARKS OF J.T.BAKER INC.
===
                 University of California  -  MSDS System              PAGE    8
                                                                        05/28/97
APPROVED BY QUALITY ASSURANCE DEPARTMENT.

                               --  LAST PAGE  --


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