------------------------------------------------------------------------------ MSDS for SODIUM DITHIONITE Page 1 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ 1 - PRODUCT IDENTIFICATION ------------------------------------------------------------------------------ PRODUCT NAME: SODIUM DITHIONITE FORMULA: NA2S2O4 FORMULA WT: 174.11 CAS NO.: 07775-14-6 NIOSH/RTECS NO.: JP2100000 COMMON SYNONYMS: SODIUM HYDROSULFITE; SODIUM SULFOXYLATE PRODUCT CODES: 3712 EFFECTIVE: 12/06/85 REVISION #01 PRECAUTIONARY LABELLING BAKER SAF-T-DATA(TM) SYSTEM HEALTH - 1 SLIGHT FLAMMABILITY - 3 SEVERE (FLAMMABLE) REACTIVITY - 3 SEVERE (WATER REACTIVE) CONTACT - 1 SLIGHT HAZARD RATINGS ARE 0 TO 4 (0 = NO HAZARD; 4 = EXTREME HAZARD). LABORATORY PROTECTIVE EQUIPMENT SAFETY GLASSES; LAB COAT; VENT HOOD; PROPER GLOVES PRECAUTIONARY LABEL STATEMENTS WARNING FLAMMABLE MAY IGNITE IF ALLOWED TO BECOME DAMP. KEEP AWAY FROM HEAT, SPARKS, FLAME. KEEP IN TIGHTLY CLOSED CONTAINER. USE WITH ADEQUATE VENTILATION. WASH THOROUGHLY AFTER HANDLING. IN CASE OF FIRE, SOAK WITH LARGE QUANTITIES OF WATER. SAF-T-DATA(TM) STORAGE COLOR CODE: RED STRIPE (STORE SEPARATELY) ------------------------------------------------------------------------------ 2 - HAZARDOUS COMPONENTS ------------------------------------------------------------------------------ COMPONENT % CAS NO. SODIUM DITHIONITE 90-100 7775-14-6 ------------------------------------------------------------------------------ 3 - PHYSICAL DATA ------------------------------------------------------------------------------ BOILING POINT: N/A VAPOR PRESSURE(MM HG): N/A MELTING POINT: N/A VAPOR DENSITY(AIR=1): 3.6 ------------------------------------------------------------------------------ MSDS for SODIUM DITHIONITE Page 2 ------------------------------------------------------------------------------ SPECIFIC GRAVITY: 0.88 EVAPORATION RATE: N/A (H2O=1) (BUTYL ACETATE=1) SOLUBILITY(H2O): APPRECIABLE (MORE THAN 10 %) % VOLATILES BY VOLUME: N/A APPEARANCE & ODOR: WHITE OR GRAYISH-WHITE, CRYSTALLINE POWDER WITH SLIGHT ODOR. ------------------------------------------------------------------------------ 4 - FIRE AND EXPLOSION HAZARD DATA ------------------------------------------------------------------------------ FLASH POINT (CLOSED CUP N/A NFPA 704M RATING: 3-1-2 FLAMMABLE LIMITS: UPPER - N/A % LOWER - N/A % FIRE EXTINGUISHING MEDIA USE FLOODING AMOUNTS OF WATER. IF A SUFFICIENT QUANTITY OF WATER IS NOT AVAILABLE, ALLOW THE MATERIAL TO BURN. SPECIAL FIRE-FIGHTING PROCEDURES FIREFIGHTERS SHOULD WEAR PROPER PROTECTIVE EQUIPMENT AND SELF-CONTAINED BREATHING APPARATUS WITH FULL FACEPIECE OPERATED IN POSITIVE PRESSURE MODE. MOVE EXPOSED CONTAINERS FROM FIRE AREA, IF IT CAN BE DONE WITHOUT RISK. UNUSUAL FIRE & EXPLOSION HAZARDS CONTACT WITH STRONG OXIDIZERS MAY CAUSE FIRE OR EXPLOSION. A VIOLENT EXOTHERMIC REACTION OCCURS WITH WATER. SUFFICIENT HEAT MAY BE PRODUCED TO IGNITE COMBUSTIBLE MATERIALS. TOXIC GASES PRODUCED SULFUR DIOXIDE ------------------------------------------------------------------------------ 5 - HEALTH HAZARD DATA ------------------------------------------------------------------------------ THRESHOLD LIMIT VALUE (TLV/TWA): 10 MG/M3 ( PPM) SHORT-TERM EXPOSURE LIMIT (STEL): 15 MG/M3 ( PPM) CARCINOGENICITY: NTP: NO IARC: NO Z LIST: NO OSHA REG: NO EFFECTS OF OVEREXPOSURE CONTACT WITH SKIN OR EYES MAY CAUSE IRRITATION. INGESTION MAY CAUSE NAUSEA AND VOMITING. DUST MAY IRRITATE NOSE AND THROAT. INHALATION OF DUST MAY CAUSE IRRITATION TO UPPER RESPIRATORY TRACT. TARGET ORGANS NONE IDENTIFIED MEDICAL CONDITIONS GENERALLY AGGRAVATED BY EXPOSURE ------------------------------------------------------------------------------ MSDS for SODIUM DITHIONITE Page 3 ------------------------------------------------------------------------------ NONE IDENTIFIED ROUTES OF ENTRY NONE INDICATED ------------------------------------------------------------------------------ 6 - REACTIVITY DATA ------------------------------------------------------------------------------ STABILITY: STABLE HAZARDOUS POLYMERIZATION: WILL NOT OCCUR CONDITIONS TO AVOID: MOISTURE, HEAT, FLAME, SOURCES OF IGNITION, HUMIDITY INCOMPATIBLES: STRONG OXIDIZING AGENTS, STRONG ACIDS, WATER, COMBUSTIBLE MATERIALS DECOMPOSITION PRODUCTS: OXIDES OF SULFUR ------------------------------------------------------------------------------ 7 - SPILL AND DISPOSAL PROCEDURES ------------------------------------------------------------------------------ STEPS TO BE TAKEN IN THE EVENT OF A SPILL OR DISCHARGE WEAR SUITABLE PROTECTIVE CLOTHING. SHUT OFF IGNITION SOURCES; NO FLARES, SMOKING, OR FLAMES IN AREA. WITH CLEAN, DRY SHOVEL, PLACE MATERIAL IN LARGE, CLEAN, COMPLETELY DRY CONTAINER AND COVER; REMOVE TO ISOLATED AREA. DISSOLVE MATERIAL IN LARGE QUANTITIES OF WATER. DISPOSAL PROCEDURE DISPOSE IN ACCORDANCE WITH ALL APPLICABLE FEDERAL, STATE, AND LOCAL ENVIRONMENTAL REGULATIONS. EPA HAZARDOUS WASTE NUMBER: D001, D003 (IGNITABLE, REACTIVE WASTE) ------------------------------------------------------------------------------ 8 - PROTECTIVE EQUIPMENT ------------------------------------------------------------------------------ VENTILATION: USE GENERAL OR LOCAL EXHAUST VENTILATION TO MEET TLV REQUIREMENTS. RESPIRATORY PROTECTION: RESPIRATORY PROTECTION REQUIRED IF AIRBORNE CONCENTRATION EXCEEDS TLV. AT CONCENTRATIONS ABOVE 10 PPM, A SELF-CONTAINED BREATHING APPARATUS IS ADVISED. EYE/SKIN PROTECTION: SAFETY GLASSES WITH SIDESHIELDS, RUBBER GLOVES ARE RECOMMENDED. ------------------------------------------------------------------------------ 9 - STORAGE AND HANDLING PRECAUTIONS ------------------------------------------------------------------------------ SAF-T-DATA(TM) STORAGE COLOR CODE: RED STRIPE (STORE SEPARATELY) SPECIAL PRECAUTIONS KEEP CONTAINER TIGHTLY CLOSED. STORE AWAY FROM WATER OR LOCATIONS WHERE ------------------------------------------------------------------------------ MSDS for SODIUM DITHIONITE Page 4 ------------------------------------------------------------------------------ WATER MAY BE USED TO EXTINGUISH FIRE. STORE BELOW 50 C. ISOLATE FROM INCOMPATIBLE MATERIALS. ------------------------------------------------------------------------------ 10 - TRANSPORTATION DATA AND ADDITIONAL INFORMATION ------------------------------------------------------------------------------ DOMESTIC (D.O.T.) PROPER SHIPPING NAME SODIUM HYDROSULFITE HAZARD CLASS FLAMMABLE SOLID UN/NA UN1384 LABELS FLAMMABLE SOLID INTERNATIONAL (I.M.O.) PROPER SHIPPING NAME SODIUM DITHIONITE HAZARD CLASS 4.2 UN/NA UN1384 LABELS SPONTANEOUSLY COMBUSTIBLE