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

MSDS Name: Cresol Red, indicator grade
Catalog Numbers:
    AC151380000, AC151380050, AC151380250
Synonyms:
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#  |
|----------------|--------------------------------------|----------|-----------|
|     1733-12-6  |Cresol Red                            |   100    | 217-064-2 |
+----------------+--------------------------------------+----------+-----------+
         Hazard Symbols: None Listed.
         Risk Phrases: None Listed.

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

                              EMERGENCY OVERVIEW
Appearance:  red-brown.
Caution! The toxicological properties of this material have not been
fully investigated.
Target Organs: None known.

Potential Health Effects
    Eye:
         No information regarding eye irritation and other potential effects
         was found.
    Skin:
         No information regarding skin irritation and other potential effects
         was found.
    Ingestion:
         The toxicological properties of this substance have not been fully
         investigated.
    Inhalation:
         The toxicological properties of this substance have not been fully
         investigated.
    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. Get medical aid
         immediately.
    Skin:
         Get medical aid. Flush skin with plenty of soap and water for at
         least 15 minutes while removing contaminated clothing and shoes.
    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 immediately.
    Inhalation:
         Remove from exposure to fresh air immediately. If not breathing,
         give artificial respiration. If breathing is difficult, give oxygen.
         Get medical aid.
    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 agent most appropriate to extinguish fire.
    Autoignition Temperature:Not available.
    Flash Point:           Not available.
    Explosion Limits, lower:Not available.
    Explosion Limits, upper:Not available.
    NFPA Rating: (estimated) Health: ; Flammability: 1; Reactivity:

               **** 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 breathing dust.
    Storage:
         Store in a cool, dry place. Store in a tightly closed container.

         **** 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|
|--------------------|-------------------|-------------------|-----------------|
| Cresol Red         |none listed        |none listed        |none listed      |
+--------------------+-------------------+-------------------+-----------------+

    OSHA Vacated PELs:
         Cresol Red:
            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:                 red-brown
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:     290 deg C (dec.)
Decomposition Temperature:  290 deg C
Solubility in water:        soluble
Specific Gravity/Density:
Molecular Formula:          C21H18O5S
Molecular Weight:           382.42

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

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

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

    RTECS#:
         CAS# 1733-12-6 unlisted.
    LD50/LC50:
         Not available.
    Carcinogenicity:
      Cresol Red -
         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# 1733-12-6 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.
       SARA Codes
         CAS # 1733-12-6: acute.
       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
    Cresol Red 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:
                      S 24/25  Avoid contact with skin and eyes.
  WGK (Water Danger/Protection)
         CAS# 1733-12-6: 1
  United Kingdom Occupational Exposure Limits

  Canada
         CAS# 1733-12-6 is listed on Canada's DSL List.
         This product has a WHMIS classification of Not controlled..
         CAS# 1733-12-6 is not listed on Canada's Ingredient Disclosure List.
  Exposure Limits

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

    MSDS Creation Date: 12/12/1997  Revision #2 Date:  9/06/2001

    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.