Vector Laboratories, Inc.                                                             Vector Laboratories, Inc.

           30 Ingold Road                                                                        30 Ingold Road

           Burlingame, CA 94010                                                                  Burlingame, CA 94010

V E C TO R Tel: (650) 697-3600 Fax: (650) 697-0339                                    V E C TO R Tel: (650) 697-3600 Fax: (650) 697-0339



                          MATERIAL SAFETY DATA SHEET                                                           MATERIAL SAFETY DATA SHEET

                                                                             PAGE 1                                                                                PAGE 2

IDENTIFICATION                                                                        IDENTIFICATION

     PRODUCT NAME Lactose                                                                  PRODUCT NAME Lactose

     CATALOG NO. S-9004                                                                    CATALOG NO. S-9004



HAZARDOUS INGREDIENTS

    MATERIAL No available information at this time. Use caution when                  SPILL OR LEAK PROCEDURES

             when handling this product.                                                   STEPS TO BE TAKEN IF MATERIAL IS RELEASED OR SPILLED Flush to

                                                                                           sewer if allowed or collect on absorbent and dispose in approved land fill.

      % BY WEIGHT 100%

      HAZARD DATA No available information at this time                                     WASTE DISPOSAL METHOD Flush to sewer if allowed.



      CAS#: 64044-51-5                                                                SPECIAL PROTECTION INFORMATION

                                                                                           RESPIRATORY PROTECTION n/a

PHYSICAL DATA                                                                              VENTILATION Use only with adequate ventilation.

     APPEARANCE White powder              MELTING POINT n/a                                PROTECTIVE GLOVES NEEDED Yes

     SOLUBILITY IN WATER soluble          BOILING POINT n/a                                EYE PROTECTION NEEDED Yes

     SPECIFIC GRAVITY n/a                 EVAPORATION RATE n/a

                                                                                      SPECIAL PRECAUTIONS

                                                                                           PRECAUTIONS TO BE TAKEN IN HANDLING AND STORAGE Store in

FIRE AND EXPLOSION HAZARD DATA                                                             refrigerator.

     FLASH POINT n/a                   FLAMMABLE LIMITS IN AIR n/a

     EXTINGUISHING MEDIA Water, foam, carbon dioxide

     SPECIAL FIREFIGHTING PROCEDURES Use respirator. Toxic gases

     can be evolved: carbon monoxide, carbon dioxide.

     UNUSUAL FIRE AND EXPLOSION HAZARDS None                                          The information contained in this Material Safety Data Sheet is believed to be

                                                                                      accurate but it is the responsibility of the user to determine the applicability

                                                                                      of these data to the formulation of necessary safety precautions. Vector

HEALTH HAZARD DATA                                                                    Laboratories Inc. shall not be held responsible for any damage resulting from

    THRESHOLD LIMIT VALUE Information not available                                   the use of the above product or the information contained in this Material Safety

    ACUTE EFFECTS OF OVEREXPOSURE May cause local discomfort if                       Data Sheet.

    place on skin, in eyes, ingested or inhaled.

    EMERGENCY AND FIRST AID PROCEDURES Wash affected area thoroughly

    with water. Irrigate eyes for at least 15 min. If inhaled, remove to fresh air.

    Call a physician.

    SKIN CONTACT May cause local discomfort

    EYE CONTACT May cause irritation

    INHALATION May cause irritation

    INGESTION Harmful if swallowed



REACTIVITY DATA

    STABILITY Stable          MATERIALS TO AVOID n/a

    CONDITIONS TO AVOID

    HAZARDOUS POLYMERIZATION Will not occur

    HAZARDOUS DECOMPOSITION PRODUCTS Carbon monoxide,

    carbon dioxide.







CONTINUED ON NEXT PAGE                                                                Revised: 3/09/04