Material Safety Data Sheet

SECTION I - Material Identity
SECTION II - Manufacturer's Information
SECTION III - Physical/Chemical Characteristics
SECTION IV - Fire and Explosion Hazard Data
SECTION V - Reactivity Data
SECTION VI - Health Hazard Data
SECTION VII - Precautions for Safe Handling and Use
SECTION VIII - Control Measures
SECTION IX - Label Data
SECTION X - Transportation Data
SECTION XI - Site Specific/Reporting Information
SECTION XII - Ingredients/Identity Information

SECTION I - Material Identity
Item Name                               
Part Number/Trade Name                   SODIUM THIOSULFATE, S-446
National Stock Number                    6810001638057
CAGE Code                                0G9K0
Part Number Indicator                    A
MSDS Number                              181701
HAZ Code                                 B

SECTION II - Manufacturer's Information
Manufacturer Name                        OCCUPATIONAL HEALTH SERVICES INC
Street                                   450 7TH AVE SUITE 2407
City                                     NEW YORK
State                                    NY
Country                                  US
Zip Code                                 10123
Emergency Phone                          615-292-1180
Information Phone                        212-967-1100

MSDS Preparer's Information
Date MSDS Prepared/Revised               18MAY88
Date of Technical Review                 21MAR95
Active Indicator                         N

Alternate Vendors
Vendor #5 CAGE                           BXBKG

SECTION III - Physical/Chemical Characteristics
Appearance/Odor                          COLORLESS, MONOCLINIC CRYSTALS OR HYGROSCOPIC POWDER; ODORLESS 
Boiling Point                            N/K
Melting Point                            N/K
Vapor Pressure                           N/K
Vapor Density                            N/K
Specific Gravity                         1.667
Decomposition Temperature                N/K
Evaporation Rate                         N/K
Solubility in Water                      50%
Percent Volatiles by Volume              N/K
Chemical pH                              SUPDAT
Corrosion Rate                           N/K
Container Pressure Code                  4
Temperature Code                         8
Product State Code                       U

SECTION IV - Fire and Explosion Hazard Data
Flash Point Method                       UNK
Lower Explosion Limit                    N/K
Upper Explosion Limit                    N/K
Extinguishing Media                      DRY CHEMICAL, CARBON DIOXIDE, HALON, WATER SPRAY OR STANDARD FOAM. FOR LARGER FIRES, USE WATER SPRAY, FOG/STD FOAM 
Special Fire Fighting Procedures         USE NIOSH/MSHA APPROVED SCBA & FULL PROTECTIVE EQUIPMENT (FP N). NO ACUTE HAZARD. MOVE CONTAINER FROM FIRE IF POSS. AVOID BREATHING VAPS/DUST; KEEP UPWIND 
Unusual Fire/Explosion Hazards           NEGLIGIBLE FIRE HAZARD WHEN EXPOSED TO HEAT OR FLAME 

SECTION V - Reactivity Data
Stability                                YES
Stability Conditions to Avoid            NONE SPECIFIED BY MANUFACTURER 
Materials to Avoid                       ACIDS:REACTS RELEASING SULFUR DIOXIDE; CHLORINE (SOLNS):FORMS SODIUM HYDROSULFATE, HALOGENS:REACTS. IODINE: (SUPDAT)
Hazardous Decomposition Products         THERMAL DECOMPOSITION MAY RELEASE TOXIC OXIDES OFSULFUR & TOXIC SODIUM OXIDE 
Hazardous Polymerization                 NO
Polymerization Conditions to Avoid       NOT RELEVANT
LD50 - LD50 Mixture                      NONE SPECIFIED BY MANUFACTURER 

SECTION VI - Health Hazard Data
Route of Entry: Skin                     YES
Route of Entry: Ingestion                YES
Route of Entry: Inhalation               NO
Health Hazards - Acute and Chronic       SODIUM THIOSULFATE MAY BE IRRITATING. TOXICITY HAS NOT BEEN FULLY CHARACTERIZED. ACUTE:INHAL:NO DATA AVAILABLE. SKIN/EYE CONTACT:MAY BE IRRITATING. INGEST:IS POORLY ABSORBED FROM BOWEL & ACTS AS AN OSMOTIC CATHARTIC. INGESTION OF LARGE AMOUNTS MAY CAUSE DIARRHEA. PROBABLE LETHAL DOSE FOR HUMANS IS (EFTS OF OVEREXP)
Carcinogenity: NTP                       NO
Carcinogenity: IARC                      NO
Carcinogenity: OSHA                      NO
Explanation of Carcinogenity             NOT RELEVANT
Symptoms of Overexposure                 HLTH HAZ:0.5-5 GM/KG. CHRONIC:INHAL/SKIN/EYE:NO DATA AVAILABLE. INGEST:HUMAN EXPOSURE TO 300 MG/KG OF PENTAHYDRATE, FOR 7 DAYS, RESULTED IN CYANOSIS. PERMITTED AS FOOD ADDITIVE. POSSIBLE HUMAN EXPOSURE EXISTS, DUE TO MIGRATION TO FOOD FROM PACKAGING MATERIALS 
Medical Cond. Aggrevated by Exposure     NONE SPECIFIED BY MANUFACTURER 
Emergency/First Aid Procedures           INHAL:REMOVE FROM EXPOS AREA TO FRESH AIR IMMED. IF BRTHG HAS STOPPED, PERFORM ARTF RESP. KEEP PERS WARM & AT REST. GET MED ATTN IMMED. SKIN:REMOVE CONTAM CLTHG & SHOES IMMED. WASH AFFECTED AREA W/SOAP OR MILD DETERGENT & LG AMTS OF WATER UNTIL NO EVID OF CHEM REMAINS (APPROX 15-20 MINS). GET MED ATTN IMMED. EYE:WASH IMMED W/LG AMTS OF WATER, OCCAS LIFTING UPPER & LOWER LIDS, UNTIL NO EVID (ING 2)

SECTION VII - Precautions for Safe Handling and Use
Steps if Material Released/Spilled       OCCUPATIONAL SPILL: SWEEP UP & PLACE IN SUITABLE CLEAN, DRYCONTAINERS FOR LATER DISPOSAL. DO NOT FLUSH W/WATER. KEEP UNNECESSARY PEOPLE AWAY 
Neutralizing Agent                       NONE SPECIFIED BY MANUFACTURER 
Waste Disposal Method                    OBSERVE ALL FEDERAL, STATE & LOCAL REGULATIONS WHEN DISPOSING OF THIS SUBSTANCE 
Handling and Storage Precautions         OBSERVE ALL FEDERAL, STATE & LOCAL REGULATIONS WHEN STORING THIS SUBSTANCE. STORE AWAY FROM INCOMPATIBLE SUBSTANCES 
Other Precautions                        NONE SPECIFIED BY MANUFACTURER 

SECTION VIII - Control Measures
Respiratory Protection                   SPECIFIC RESP SELECTED MUST BE BASED ON CONTAM LEVELS FOUND IN WORK PLACE, MUST NOT EXCEED WORKING LIMS OF RESP & NIOSH/MSHAAPPRVD. FOLLOWING RESPS ARE REC BASED ON DATA FOUND IN PHYSICAL DATA, HLTHEFTS & TOX SECTIONS. THEY ARE (ING 5)
Ventilation                              PROVIDE GENERAL DILUTION VENTILATION 
Protective Gloves                        IMPERVIOUS GLOVES (FP N) 
Eye Protection                           ANSI APPROVED CHEM WORKERS GOGGS (FP N) 
Other Protective Equipment               EYE WASH FOUNTAIN & DELUGE SHOWER WHICH MEETANSI DESIGN CRITERIA (FP N). EMPLOYEE MUST WEAR APPROP PROT (ING 10)
Work Hygenic Practices                   CONTACT LENSES SHOULD NOT BE WORN 
Supplemental Health/Safety Data          PH:6.5-8 IN SOLN. MATLS TO AVOID:INCOMPAT; LEAD/MERCURY SALTS:INCOMPAT; METAL NITRATES:MAY FORM EXPLO MIXTS; OXIDANTS:REACTS; POTASSIUM NITRATE:MIXT IS EXPLO ON HEATING; SILVER SALTS:INCOMPAT; SODIUM NITRATE:MIXT IS EXPLO ON HEATING; SODIUM NITRITE:MAY EXPLODE VIOLENTLY ON HEAT DRYING 

SECTION IX - Label Data
Protect Eye                              NO
Protect Skin                             NO
Protect Respiratory                      NO
Chronic Indicator                        UNKNOWN
Contact Code                             UNKNOWN
Fire Code                                UNKNOWN
Health Code                              UNKNOWN
React Code                               UNKNOWN

SECTION X - Transportation Data
Container Quantity                       1
Unit of Measure                          LB

SECTION XI - Site Specific/Reporting Information
Volatile Organic Compounds (P/G)         0
Volatile Organic Compounds (G/L)         0

SECTION XII - Ingredients/Identity Information
Ingredient #                             01
Ingredient Name                          THIOSULFURIC ACID, DISODIUM SALT; (SODIUM THIOSULFATE)
CAS Number                               7772987
NIOSH Number                             XN6476000
Proprietary                              NO
Percent                                  100
OSHA PEL                                 N/K (FP N)
ACGIH TLV                                N/K (FP N)
Recommended Limit                        N/K