EMS CATALOG NO: GOLD

                                                                    CONJUGATES

                                                              DATE:    12/17/2000

                                                           PAGE NUMBER: One of 3





                          MATERIAL SAFETY DATA SHEET



The information contained herein is based on data considered accurate. However, no

warranty is expressed or implied regarding the accuracy of these data or the results to be

obtained from the use thereof.



Electron Microscopy Sciences assumes no responsibility for personal injury or property

damage to vendees, users or third parties caused by the material. Such vendees or users

assume all risks associated with the use of the material.





ELECTRON MICROSCOPY SCIENCES

321 MORRIS ROAD

P.O. BOX 251

FORT WASHINGTON, PA 19034           24 HOUR EMERGENCY PHONE NUMBER

(215) 646-1566                            CHEMTREC: (800) 424-9300

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                FOR PRODUCT AND SALES INFORMATION

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       CONTACT ELECTRON MICROSCOPY SCIENCES OFFICE ABOVE.



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                       PRODUCT IDENTIFICATION

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                               Gold Conjugates

PRODUCT NAME:



APPEARANCE AND ODOR:                 Liquid



COMPONENTS:                     Glycerol  20%

                                Sodium Azide 0.1%

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                         HEALTH HAZARD DATA

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ACUTE EFFECTS:



      May be harmful by inhalation, ingestion, or skin absorption. May

      cause irritation. Exposure to Gold Compound can cause contact

      dermatitis. The toxicological properties have not been

      thoroughly investigated.



FIRST AID:



      If swallowed, wash out mouth with water provided person is

      conscious. Call a physician.



      In case of skin contact, flush with copious amounts of water for

      at least 15 minutes. Remove contaminated clothing and shoes.

      Call a Physician.



      In case of contact with eyes, flush with copious amounts of water

      for at least 15 minutes. Assure adequate flushing by separating

      the eyelids with fingers. Call a physician.

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                          TOXICITY HAZARDS

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      Data not available.

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                  FIRE AND EXPLOSION HAZARD DATA

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EXTINGUISHING MEDIA:



      Noncombustible. Use extinguishing media appropriate to

      surrounding fire conditions.



SPECIAL FIRE FIGHTING PROCEDURES:



      Wear self-contained breathing apparatus and protective clothing

      to prevent contact with skin and eyes.



REACTIVITY DATA: Stable

HAZARDOUS POLYMERIZATION: Will not occur









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                        SPILL OR LEAK PROCEDURES

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STEPS TO BE TAKEN IF MATERIAL IS RELEASED OR SPILLED:



      Wear respirator, chemical safety goggles, rubber boots and heavy

      rubber gloves. Absorb on sand or vermiculite and place in closed

      container for disposal. Ventilate area and wash spill site after

      material pickup is complete.



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                       WASTE DISPOSAL METHOD

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      Dissolve or mix the material with a combustible solvent and burn

      in a chemical incinerator equipped with an afterburner and

      scrubber. Observe all Federal, State, and Local laws.



PRECAUTIONS TO BE TAKEN IN HANDLING AND STORAGE:



      NIOSH/MSHA-approved respirator.

      Mechanical exhaust required.

      Compatible chemical-resistant gloves.

      Chemical safety goggles.

      CAUTION: Avoid contact and inhalation.