MATERIAL SAFETY DATA SHEET

MSDS DATE:07/26/07



SECTION 1: PRODUCT AND COMPANY IDENTIFICATION



PRODUCT NAME: MOHRCHEM RC DEVELOPER

SYNONYMS: N/A

PRODUCT CODES: 74961-01



MANUFACTURER:     ELECTRON MICROSCOPY SCIENCES

DIVISION:         1560 INDUSTRY ROAD/P.O. BOX 550

ADDRESS:          HATFIELD, PA 19440



EMERGENCY PHONE: 215-412-8400

CHEMTREC PHONE: 800-424 -4300



FAX PHONE:         215-412-8450



CHEMICAL NAME: MOHRCHEM RC DEVELOPER

CHEMICAL FAMILY: N/A





SECTION 2: COMPOSITION/INFORMATION ON INGREDIENTS



INGREDIENT:

POTASSIUM HYDROXIDE

HYDROQUINONE



CAS NO.                       % WT                  % VOL             SARA 313 REPORTABLE

1310-58-3                     5-10                     N/A

123-31-9                        <5                     N/A

                              ppm                   mg/m3

   OSHA PEL-TWA:                N/A                    N/A

   OSHA PEL STEL :              N/A                    N/A

   OSHA PEL CEILING:            N/A                    N/A





   ACGIH TLV-TWA:                 N/A                 2

   ACGIH TLV STEL:                N/A                 2

   ACGIH TLV CEILING:             N/A







SECTION 3: HAZARDS IDENTIFICATION



EMERGENCY OVERVIEW: N/A



ROUTES OF ENTRY: N/A



POTENTIAL HEALTH EFFECTS

   EYES: IRRITATING TO EYES. PROLONGED EYE CONTACT (WITH VAPORS OF LIQUID) MAY LEAD TO LOSS OF VISUAL ACUITY



   SKIN: LIQUID IRRITATING TO SKIN. PROLONGED CONTACT MAY RESULT IN BOTH HYPOMELANOSIS-HYPERPIGMENTATION

   OF THE SKIN AND DEPIGMENTATION



   INGESTION: MAY CUSE SEVER IRRITATION AND INFLAMMATION OF THE MOUTH, THROAT AND STOMACH.



   INHALATION: NORMALLY NOT A PROBLEM, BUT INHALATION OF MIST COULD CAUSE RESPIRATORY IRRITATION



ACUTE HEALTH HAZARDS: N/A



CHRONIC HEALTH HAZARDS: N/A







MEDICAL CONDITIONS GENERALLY AGGRAVATED BY EXPOSURE: N/A









CARCINOGENICITY

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MATERIAL SAFETY DATA SHEET

MSDS DATE:07/26/07

   OSHA: N/A            ACGIH: N/A         NTP: N/A        IARC: N/A

   OTHER: N/A







SECTION 4: FIRST AID MEASURES



EYES: FLUSH WITH WATER FOR 15 MINUTES IF IRRITATION OCCURS. SEEK MEDICAL

ATTENTION



SKIN: WASH WITH SOAP AND WATER. IF IRRITATION OCCURS. SEEK MEDICAL ATTENTION.



INGESTION: DO NOT INDUCE VOMITING. IF CONSCIOUS, GIVE PLENTY OF WATER OR MILK. OBTAIN MEDICAL ATTENTION

IMMEDIATLEY



INHALATION: N/A



NOTES TO PHYSICIANS OR FIRST AID PROVIDERS: N/A









SECTION 5: FIRE-FIGHTING MEASURES



FLAMMABLE LIMITS IN AIR, UPPER: N/A

  (% BY VOLUME)         LOWER: N/A



FLASH POINT: NONE

 F: N/A

 C: N/A

METHOD USED: N/A



AUTOIGNITION TEMPERATURE: N/A

 F: N/A

 C: N/A



NFPA HAZARD CLASSIFICATION

   HEALTH: 2             FLAMMABILITY: 0               REACTIVITY: 0

   OTHER: N/A



HMIS HAZARD CLASSIFICATION

   HEALTH: 2             FLAMMABILITY: 0              REACTIVITY: 0

   PROTECTION: N/A



EXTINGUISHING MEDIA: USE AGENT APPROPRIATE FOR SURRONDING FIRE



SPECIAL FIRE FIGHTING PROCEDURES: WEAR SELF-CONTAINED BREATHING APPARATUS AND PROTECTIVE CLOTHING TO

PREVENT CONTACT WITH SKIN AND EYES



UNUSUAL FIRE AND EXPLOSION HAZARDS: FIRE OR EXCESSIVE HEAT MAY CAUSE PRODUCTION OF HAZARDOUS

DECOMPOSITION PRODUCTS



HAZARDOUS DECOMPOSITION PRODUCTS: SULFUR DIOXIDE UNDER ACIDIC CONDITIONS. EXCESSIVE HEAT MAY PRODUCE

HAZARDOUS OXIDES OF SULFUR AND NITROGEN









SECTION 6: ACCIDENTAL RELEASE MEASURES



ACCIDENTAL RELEASE MEASURES: USE APPROPRIATE PERSONAL PROTECTIVE EQUIPMENT DURING CLEAN UP. SPILL MAY

BE NEUTRALIZED WITH VINEGAR. DISPOSE TO SEWER WITH AT LEAST TEN TIMES EQUIVALENT VOLUME OF WATER.

DISCHARGE TO SEWER MAY BE SUBJECT TO FEDERL, STATE (PROVINCIAL) OR LOCAL LAWS.









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MATERIAL SAFETY DATA SHEET

MSDS DATE:07/26/07



SECTION 7: HANDLING AND STORAGE



HANDLING AND STORAGE: STORE IN A WELL VENTILATED AREA. KEEP CONTAINER TIGHTLY CLOSED. DO NOT STORE OR

CONSUME FOOD, DRINK, OR TOBACCO IN AN AREA WHERE THEY MAY BECOME CONTAMINATED WITH THIS MATERIAL. KEEP

OUT OF REACH OF CHILDREN



OTHER PRECAUTIONS: N/A









SECTION 8: EXPOSURE CONTROLS/PERSONAL PROTECTION



ENGINEERING CONTROLS: N/A



VENTILATION: GOOD VENTILATION OF 10 ROOM VOLUMES PER HOUR. VENTILATION RATES SHOULD MATCH CONDITIONS OF

USE.



RESPIRATORY PROTECTION: N/A





EYE PROTECTION: SAFETY GLASSES



SKIN PROTECTION: IMPERVIOUS GLOVES



OTHER PROTECTIVE CLOTHING OR EQUIPMENT:



WORK HYGIENIC PRACTICES: WASH THOROUGHLY AFTER HANDLING. WASH CLOTHING BEFORE REUSE.



EXPOSURE GUIDELINES: N/A









SECTION 9: PHYSICAL AND CHEMICAL PROPERTIES



APPEARANCE: LIGHT STRAW



ODOR: ODORLESS



PHYSICAL STATE: LIQUID



pH AS SUPPLIED: 11.0

pH (Other): N/A

BOILING POINT:

             F: N/A

             C: 100 DEGREES

MELTING POINT: N/A

             F: N/A

             C: N/A

FREEZING POINT: N/A

             F: N/A

             C: N/A

VAPOR PRESSURE (mmHg): N/A

     @

             F: N/A

             C: N/A

VAPOR DENSITY (AIR = 1): N/A

     @

             F:   N/A

             C: N/A

     @

             F: N/A

             C: N/A

EVAPORATION RATE:



BASIS (=1): N/A





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MATERIAL SAFETY DATA SHEET

MSDS DATE:07/26/07





SECTION 9: PHYSICAL AND CHEMICAL PROPERTIES (con’t)



SOLUBILITY IN WATER: COMPLETE



PERCENT SOLIDS BY WEIGHT: COMPLETE



PERCENT VOLATILE: N/A

     BY WT/ BY VOL @

           F: N/A

           C: N/A

VOLATILE ORGANIC COMPOUNDS (VOC):



      WITH WATER: N/A      LBS/GAL

   WITHOUT WATER: N/A       LBS/GAL



MOLECULAR WEIGHT: N/A

VISCOSITY: N/A

     @

            F: N/A

            C: N/A





SECTION 10: STABILITY AND REACTIVITY







STABILITY: STABLE



CONDITIONS TO AVOID (STABILITY): N/A



INCOMPATIBILITY (MATERIAL TO AVOID): STRONG ACIDS



HAZARDOUS DECOMPOSITION OR BY-PRODUCTS: SULFUR DIOXIDE UNDER ACIDIC CONDITIONS. EXCESSIVE HEAT MAY

PRODUCE HAZARDOUS OXIDES OF SULFUR AND NITROGEN.



HAZARDOUS POLYMERIZATION: WILL NOT OCCUR



CONDITIONS TO AVOID (POLYMERIZATION): N/A









SECTION 11: TOXICOLOGICAL INFORMATION



TOXICOLOGICAL INFORMATION: N/A





SECTION 12: ECOLOGICAL INFORMATION



ECOLOGICAL INFORMATION: N/A









SECTION 13: DISPOSAL CONSIDERATIONS



WASTE DISPOSAL METHOD: COMPLY WITH FEDERAL, STATE, LOCAL REGULATIONS.



RCRA HAZARD CLASS: N/A







SECTION 13: DISPOSAL CONSIDERATIONS (con’t)









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MATERIAL SAFETY DATA SHEET

MSDS DATE:07/26/07

SECTION 14: TRANSPORT INFORMATION



U.S. DEPARTMENT OF TRANSPORTATION

    PROPER SHIPPING NAME: MOHRCHEM RC DEVELOPER

    HAZARD CLASS: N/A

    ID NUMBER: N/A

    PACKING GROUP: N/A

    LABEL STATEMENT: N/A



WATER TRANSPORTATION

   PROPER SHIPPING NAME:

   HAZARD CLASS:                      SAME

   ID NUMBER:

   PACKING GROUP:

   LABEL STATEMENTS:





AIR TRANSPORTATION

    PROPER SHIPPING NAME:

    HAZARD CLASS:                     SAME

    ID NUMBER:

    PACKING GROUP:

    LABEL STATEMENTS:





OTHER AGENCIES: N/A









SECTION 15: REGULATORY INFORMATION



U.S. FEDERAL REGULATIONS

    TSCA (TOXIC SUBSTANCE CONTROL ACT): N/A



   CERCLA (COMPREHENSIVE RESPONSE COMPENSATION, AND LIABILITY ACT): N/A



   SARA TITLE III (SUPERFUND AMENDMENTS AND REAUTHORIZATION ACT): N/A



   311/312 HAZARD CATEGORIES: N/A



   313 REPORTABLE INGREDIENTS: N/A



STATE REGULATIONS: N/A



INTERNATIONAL REGULATIONS: N/A









SECTION 16: OTHER INFORMATION



OTHER INFORMATION: N/A



PREPARATION INFORMATION: N/A



DISCLAIMER: IN COMPLIANCE WITH THE OSHA HAZARD COMMUNICATION STANDARD, 2.9 C.F.R

1910. 1200, WE ARE PROVIDING YOU WITH A MSDS FOR THE HAZARDOUS MATERIAL YOU ARE

PURCHASING.

IT IS YOUR RESPONSIBILITY TO EDUCATE YOUR EMPLOYEES ON THE SAFE USE OF THE HAZARDOUS

MATERIAL.

ELECTRON MICROSCOPY SCIENCES MAKES NO PRESENTATION AS TO THE ACCURACY OF THE

INFORMATION IN THE MSDS. THE INFORMATION IS BELIEVED TO BE CORRECT; HOWEVER, YOU

(THE CUSTOMER), SHOULD PERFORM YOUR OWN INVESTIGATION AND INDEPENDENT

VERIFICATION. IF YOU RESELL THE PRODUCT, YOU ARE RESPONSIBLE TO FORWARD THE

INFORMATION IN THE MSDS TO YOUR CUSTOMER.









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