**** SECTION 1 - CHEMICAL PRODUCT AND COMPANY IDENTIFICATION ****

MSDS Name: Fluorescein, Disodium Salt
Catalog Numbers:
    AC173240000, AC173241000, AC173245000
Synonyms:
    Water Soluable Fluorescein; Resorcinol Phthalein Sodium; Acid Yellow
    73
Company Identification (Europe):  Acros Organics BVBA
                                 Janssen Pharmaceuticalaan 3a
                                 2440 Geel, Belgium
Company Identification (USA):     Acros Organics
                                 One Reagent Lane
                                 Fairlawn, NJ  07410
For information in North America, call:   800-ACROS-01
For information in Europe, call:          0032(0) 14575211
For emergencies in the US, call CHEMTREC: 800-424-9300
For emergencies in Europe, call:     0032(0) 14575299

         **** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****

+----------------+--------------------------------------+----------+-----------+
|      CAS#      |              Chemical Name           |    %     |  EINECS#  |
|----------------|--------------------------------------|----------|-----------|
|      518-47-8  |Fluorescein, Disodium Salt            |   100    | 208-253-0 |
+----------------+--------------------------------------+----------+-----------+
         Hazard Symbols: None Listed.
         Risk Phrases: None Listed.

                 **** SECTION 3 - HAZARDS IDENTIFICATION ****

                              EMERGENCY OVERVIEW
Appearance:  orange to red.
Caution! Hygroscopic. May cause eye and skin irritation. May cause
respiratory and digestive tract irritation.
Target Organs: Kidneys.

Potential Health Effects
    Eye:
         May cause eye irritation.
    Skin:
         May cause skin irritation.
    Ingestion:
         In high doses may cause gastric irritation, nausea, vomiting, fever,
         skin rashes, and blood abnormalities including anemia.
    Inhalation:
         Inhalation of dust may cause respiratory tract irritation.
    Chronic:
         Not available.

                   **** SECTION 4 - FIRST AID MEASURES ****

    Eyes:
         Flush eyes with plenty of water for at least 15 minutes,
         occasionally lifting the upper and lower eyelids. If irritation
         develops, get medical aid.
    Skin:
         Flush skin with plenty of soap and water for at least 15 minutes
         while removing contaminated clothing and shoes. Get medical aid if
         irritation develops or persists.
    Ingestion:
         If victim is conscious and alert, give 2-4 cupfuls of milk or water.
         Never give anything by mouth to an unconscious person. Get medical
         aid if irritation or symptoms occur.
    Inhalation:
         Remove from exposure to fresh air immediately. If not breathing,
         give artificial respiration. If breathing is difficult, give oxygen.
         Get medical aid if cough or other symptoms appear.
    Notes to Physician:
         Treat symptomatically and supportively.

                 **** SECTION 5 - FIRE FIGHTING MEASURES ****

    General Information:
         As in any fire, wear a self-contained breathing apparatus in
         pressure-demand, MSHA/NIOSH (approved or equivalent), and full
         protective gear.
    Extinguishing Media:
         Use water spray, dry chemical, carbon dioxide, or appropriate foam.
    Autoignition Temperature:Not available.
    Flash Point:           Not available.
    Explosion Limits, lower:Not available.
    Explosion Limits, upper:Not available.
    NFPA Rating:            Not published.

               **** SECTION 6 - ACCIDENTAL RELEASE MEASURES ****

    General Information: Use proper personal protective equipment as indicated
                         in Section 8.
    Spills/Leaks:
         Vacuum or sweep up material and place into a suitable disposal
         container. Avoid generating dusty conditions.

                  **** SECTION 7 - HANDLING and STORAGE ****

    Handling:
         Wash thoroughly after handling. Use only in a well-ventilated area.
         Minimize dust generation and accumulation. Avoid contact with eyes,
         skin, and clothing. Avoid ingestion and inhalation.
    Storage:
         Store in a tightly closed container. Store in a cool, dry,
         well-ventilated area away from incompatible substances.

         **** SECTION 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION ****

    Engineering Controls:
         Use adequate ventilation to keep airborne concentrations low.

                                Exposure Limits
+--------------------+-------------------+-------------------+-----------------+
|   Chemical Name    |        ACGIH      |       NIOSH       |OSHA - Final PELs|
|--------------------|-------------------|-------------------|-----------------|
| Fluorescein, Disodi|none listed        |none listed        |none listed      |
| um Salt            |                   |                   |                 |
+--------------------+-------------------+-------------------+-----------------+

    OSHA Vacated PELs:
         Fluorescein, Disodium Salt:
            No OSHA Vacated PELs are listed for this chemical.

    Personal Protective Equipment

                Eyes:
                      Wear appropriate protective eyeglasses or chemical
                      safety goggles as described by OSHA's eye and face
                      protection regulations in 29 CFR 1910.133 or European
                      Standard EN166.
                Skin:
                      Wear appropriate protective gloves to prevent skin
                      exposure.
            Clothing:
                      Wear appropriate protective clothing to prevent skin
                      exposure.
         Respirators:
                      Follow the OSHA respirator regulations found in 29CFR
                      1910.134 or European Standard EN 149. Always use a
                      NIOSH or European Standard EN 149 approved respirator
                      when necessary.

            **** SECTION 9 - PHYSICAL AND CHEMICAL PROPERTIES ****

Physical State:             Powder
Appearance:                 orange to red
Odor:                       Not available.
pH:                         Not available.
Vapor Pressure:             Not available.
Vapor Density:              Not available.
Evaporation Rate:           Not available.
Viscosity:                  Not available.
Boiling Point:              Not available.
Freezing/Melting Point:     314-316 deg C
Decomposition Temperature:
Solubility in water:        Soluble.
Specific Gravity/Density:
Molecular Formula:          C20H10Na2O5
Molecular Weight:           376.0466

                **** SECTION 10 - STABILITY AND REACTIVITY ****

    Chemical Stability:
         Stable under normal temperatures and pressures.
    Conditions to Avoid:
         Moisture.
    Incompatibilities with Other Materials:
         Strong oxidizing agents.
    Hazardous Decomposition Products:
         Carbon monoxide, carbon dioxide, sodium oxide.
    Hazardous Polymerization: Has not been reported

               **** SECTION 11 - TOXICOLOGICAL INFORMATION ****

    RTECS#:
         CAS# 518-47-8: LM5425000
    LD50/LC50:
         CAS# 518-47-8: Oral, mouse: LD50 = 4738 mg/kg; Oral, rat: LD50 =
         6721 mg/kg.
    Carcinogenicity:
      Fluorescein, Disodium Salt -
         Not listed by ACGIH, IARC, NIOSH, NTP, or OSHA.
    Epidemiology:
         No data available.
    Teratogenicity:
         No data available.
    Reproductive Effects:
         No data available.
    Neurotoxicity:
         No data available.
    Mutagenicity:
         No data available.
    Other Studies:
         No data available.

                 **** SECTION 12 - ECOLOGICAL INFORMATION ****
 
 

                **** SECTION 13 - DISPOSAL CONSIDERATIONS ****

Chemical waste generators must determine whether a discarded chemical
is classified as a hazardous waste.
US EPA guidelines for the classification determination are listed in
40 CFR Parts 261.3. Additionally, waste generators must consult state
and local hazardous waste regulations to ensure complete and accurate
classification.
RCRA P-Series: None listed.
RCRA U-Series: None listed.

                 **** SECTION 14 - TRANSPORT INFORMATION ****

    US DOT
         No information available
    Canadian TDG
         No information available.

                 **** SECTION 15 - REGULATORY INFORMATION ****

US FEDERAL
    TSCA
         CAS# 518-47-8 is listed on the TSCA inventory.
       Health & Safety Reporting List
         None of the chemicals are on the Health & Safety Reporting List.
       Chemical Test Rules
         None of the chemicals in this product are under a Chemical Test Rule.
       Section 12b
         None of the chemicals are listed under TSCA Section 12b.
       TSCA Significant New Use Rule
         None of the chemicals in this material have a SNUR under TSCA.
    SARA
       Section 302 (RQ)
         None of the chemicals in this material have an RQ.
       Section 302 (TPQ)
         None of the chemicals in this product have a TPQ.
       Section 313
         No chemicals are reportable under Section 313.
    Clean Air Act:
         This material does not contain any hazardous air pollutants.
         This material does not contain any Class 1 Ozone depletors.
         This material does not contain any Class 2 Ozone depletors.
    Clean Water Act:
         None of the chemicals in this product are listed as Hazardous
         Substances under the CWA.
         None of the chemicals in this product are listed as Priority
         Pollutants under the CWA.
         None of the chemicals in this product are listed as Toxic Pollutants
         under the CWA.
    OSHA:
         None of the chemicals in this product are considered highly hazardous
         by OSHA.
STATE
    Fluorescein, Disodium Salt is not present on state lists from CA, PA,
    MN, MA, FL, or NJ.
    California No Significant Risk Level:
    None of the chemicals in this product are listed.
European/International Regulations
    European Labeling in Accordance with EC Directives
         Hazard Symbols: Not available.
         Risk Phrases:
         Safety Phrases:
  WGK (Water Danger/Protection)
         CAS# 518-47-8: 2
  United Kingdom Occupational Exposure Limits

  Canada
         CAS# 518-47-8 is listed on Canada's DSL List.
         This product has a WHMIS classification of C, D2B.
         CAS# 518-47-8 is not listed on Canada's Ingredient Disclosure List.
  Exposure Limits

                 **** SECTION 16 - ADDITIONAL INFORMATION ****

    MSDS Creation Date:  4/01/1998  Revision #1 Date:  8/02/2000

    The information above is believed to be accurate and represents the best
    information currently available to us. However, we make no warranty of
    merchantability or any other warranty, express or implied, with respect to
    such information, and we assume no liability resulting from its use. Users
    should make their own investigations to determine the suitability of the
    information for their particular purposes. In no way shall the company be
    liable for any claims, losses, or damages of any third party or for lost
    profits or any special, indirect, incidental, consequential or exemplary
    damages, howsoever arising, even if the company has been advised of
    the possibility of such damages.