Product Number:  295698
Product Name:  Sulfur dioxide, 99.9+%
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Valid 05/2001 - 07/2001

Aldrich Chemical Co., Inc.
1001 West St. Paul
Milwaukee, WI 53233 USA
Tel: 414-273-3850





             M A T E R I A L  S A F E T Y  D A T A  S H E E T
             
SECTION 1. - - - - - - - - - CHEMICAL IDENTIFICATION- - - - - - - - - -
    CATALOG #:            295698
    NAME:                 SULFUR DIOXIDE, 99.9+%
SECTION 2. - - - - - COMPOSITION/INFORMATION ON INGREDIENTS - - - - - -
    CAS #:  7446-09-5
    MF: O2S
    EC NO:  231-195-2
  SYNONYMS
    FERMENICIDE LIQUID * FERMENICIDE POWDER * SCHWEFELDIOXYD (GERMAN) *
    SIARKI DWUTLENEK (POLISH) * SULFUR DIOXIDE (ACGIH:OSHA) * SULFUROUS
    ACID ANHYDRIDE * SULFUROUS ANHYDRIDE * SULFUROUS OXIDE * SULFUR OXIDE
    * SULFUR SUPEROXIDE * SULPHUR DIOXIDE *
SECTION 3. - - - - - - - - - - HAZARDS IDENTIFICATION - - - - - - - - -
  LABEL PRECAUTIONARY STATEMENTS
    TOXIC
    TOXIC BY INHALATION.
    CAUSES BURNS.
    RISK OF EXPLOSION IF HEATED UNDER CONFINEMENT.
    CAUTION: NONFLAMMABLE HIGH-PRESSURE GAS.
    TARGET ORGAN(S):
    BLOOD
    IN CASE OF ACCIDENT OR IF YOU FEEL UNWELL, SEEK MEDICAL ADVICE
    IMMEDIATELY (SHOW THE LABEL WHERE POSSIBLE).
    IN CASE OF CONTACT WITH EYES, RINSE IMMEDIATELY WITH PLENTY OF
    WATER AND SEEK MEDICAL ADVICE.
    WEAR SUITABLE PROTECTIVE CLOTHING, GLOVES AND EYE/FACE
    PROTECTION.
    KEEP CONTAINER TIGHTLY CLOSED AND IN WELL-VENTILATED PLACE.
SECTION 4. - - - - - - - - - - FIRST-AID MEASURES- - - - - - - - - - -
    IF SWALLOWED, WASH OUT MOUTH WITH WATER PROVIDED PERSON IS CONSCIOUS.
    CALL A PHYSICIAN.
    IF INHALED, REMOVE TO FRESH AIR. IF NOT BREATHING GIVE ARTIFICIAL
    RESPIRATION. IF BREATHING IS DIFFICULT, GIVE OXYGEN.
SECTION 5. - - - - - - - - - FIRE FIGHTING MEASURES - - - - - - - - - -
  EXTINGUISHING MEDIA
    USE WATER SPRAY OR FOG NOZZLE TO KEEP CYLINDER COOL. MOVE CYLINDER
    AWAY FROM FIRE IF THERE IS NO RISK.
  SPECIAL FIREFIGHTING PROCEDURES
    WEAR SELF-CONTAINED BREATHING APPARATUS AND PROTECTIVE CLOTHING TO
    PREVENT CONTACT WITH SKIN AND EYES.
  UNUSUAL FIRE AND EXPLOSIONS HAZARDS
    CONTAINER EXPLOSION MAY OCCUR UNDER FIRE CONDITIONS.
    EMITS TOXIC FUMES UNDER FIRE CONDITIONS.
SECTION 6. - - - - - - - - ACCIDENTAL RELEASE MEASURES- - - - - - - - -
    WEAR SELF-CONTAINED BREATHING APPARATUS, RUBBER BOOTS AND HEAVY
    RUBBER GLOVES.
    VENTILATE AREA AND WASH SPILL SITE AFTER MATERIAL PICKUP IS COMPLETE.
    EVACUATE AREA AND KEEP PERSONNEL UPWIND.
    SHUT OFF LEAK IF THERE IS NO RISK.
SECTION 7. - - - - - - - - - - HANDLING AND STORAGE- - - - - - - - - - -
    REFER TO SECTION 8.
SECTION 8. - - - - - - EXPOSURE CONTROLS/PERSONAL PROTECTION- - - - - -
    MECHANICAL EXHAUST REQUIRED.
    SAFETY SHOWER AND EYE BATH.
    WASH THOROUGHLY AFTER HANDLING.
    DO NOT BREATHE GAS.
    DO NOT GET IN EYES, ON SKIN, ON CLOTHING.
    AVOID PROLONGED OR REPEATED EXPOSURE.
    NIOSH/MSHA-APPROVED RESPIRATOR IN NONVENTILATED AREAS AND/OR FOR
    EXPOSURE ABOVE THE ACGIH TLV.
    COMPATIBLE CHEMICAL-RESISTANT GLOVES.
    CHEMICAL SAFETY GOGGLES.
    CONTENTS UNDER PRESSURE.
    KEEP TIGHTLY CLOSED.
    CYLINDER TEMPERATURE SHOULD NOT EXCEED 125 F(52 C).
    STORE AND USE WITH ADEQUATE VENTILATION.
SECTION 9. - - - - - - - PHYSICAL AND CHEMICAL PROPERTIES - - - - - - -
  PHYSICAL PROPERTIES
    BOILING POINT:        -10  C
    MELTING POINT:      -73  C
    VAPOR PRESSURE:      1,779 MMHG
    VAPOR DENSITY:     2.26 G/L
SECTION 10. - - - - - - - - -STABILITY AND REACTIVITY - - - - - - - - -
  INCOMPATIBILITIES
    PROTECT FROM MOISTURE.
    SENSITIVE TO HEAT
    STRONG REDUCING AGENTS
    ZINC
    STRONG OXIDIZING AGENTS
  HAZARDOUS COMBUSTION OR DECOMPOSITION PRODUCTS
    NATURE OF DECOMPOSITION PRODUCTS NOT KNOWN.
SECTION 11. - - - - - - - - - TOXICOLOGICAL INFORMATION - - - - - - - -
  ACUTE EFFECTS
    MAY CAUSE SKIN IRRITATION.
    MAY BE HARMFUL IF ABSORBED THROUGH THE SKIN.
    MAY CAUSE EYE IRRITATION.
    MAY BE HARMFUL IF INHALED.
    MATERIAL MAY BE IRRITATING TO MUCOUS MEMBRANES AND UPPER
    RESPIRATORY TRACT.
    CAN CAUSE RAPID SUFFOCATION.
    MAY BE HARMFUL IF SWALLOWED.
    EXPOSURE CAN CAUSE:
    NAUSEA, DIZZINESS AND HEADACHE
  CHRONIC EFFECTS
    THIS PRODUCT IS OR CONTAINS A COMPONENT THAT IS NOT CLASSIFIABLE AS
    TO ITS CARCINOGENICITY BASED ON ITS IARC, ACGIH, NTP OR EPA
    CLASSIFICATION.
    TARGET ORGAN(S):
    BLOOD
  RTECS #: WS4550000
    SULFUR DIOXIDE
  IRRITATION DATA
    EYE-RBT 6 PPM/4H/32D MLD                      JPCAAC 10,17,1960
  TOXICITY DATA
    IHL-HMN LCLO:1000 PPM/10M                     CTOXAO 5,198,1972
    IHL-HMN LCLO:3000 PPM/5M                      TABIA2 3,231,1933
    IHL-RAT LC50:2520 PPM/1H                      NTIS** AD-A148-952
    IHL-MUS LC50:3000 PPM/30M                     JCTODH 4,236,1977
  TARGET ORGAN DATA
    LUNGS, THORAX OR RESPIRATION (RESPIRATORY DEPRESSION)
    LUNGS, THORAX OR RESPIRATION (OTHER CHANGES)
    LUNGS, THORAX OR RESPIRATION (TUMORS)
    PATERNAL EFFECTS (TESTES, EPIDIDYMIS, SPERM DUCT)
    MATERNAL EFFECTS (MENSTRUAL CYLCE CHANGES OR DISORDERS)
    EFFECTS ON EMBRYO OR FETUS (FETOTOXICITY)
    SPECIFIC DEVELOPMENTAL ABNORMALITIES (MUSCULOSKELETAL SYSTEM)
    EFFECTS ON NEWBORN (GROWTH STATISTICS)
    EFFECTS ON NEWBORN (BEHAVIORAL)
    TUMORIGENIC (EQUIVOCAL TUMORIGENIC AGENT BY RTECS CRITERIA)
    ONLY SELECTED REGISTRY OF TOXIC EFFECTS OF CHEMICAL SUBSTANCES
    (RTECS) DATA IS PRESENTED HERE. SEE ACTUAL ENTRY IN RTECS FOR
    COMPLETE INFORMATION.
SECTION 12. - - - - - - - - - ECOLOGICAL INFORMATION - - - - - - - - - -
    DATA NOT YET AVAILABLE.
SECTION 13. - - - - - - - - - DISPOSAL CONSIDERATIONS - - - - - - - - -
    CONTACT A LICENSED PROFESSIONAL WASTE DISPOSAL SERVICE TO DISPOSE OF
    THIS MATERIAL.
    CAUTION: NO-RETURN CYLINDER. DO NOT REUSE. EMPTY CYLINDER WILL CONTAIN
    HAZARDOUS RESIDUE. FOLLOW PROPER DISPOSAL TECHNIQUES.
    OBSERVE ALL FEDERAL, STATE AND LOCAL ENVIRONMENTAL REGULATIONS.
SECTION 14. - - - - - - - - - - TRANSPORT INFORMATION - - - - - - - - -
    CONTACT ALDRICH CHEMICAL COMPANY FOR TRANSPORTATION INFORMATION.
SECTION 15. - - - - - - - - - REGULATORY INFORMATION - - - - - - - - - -
  EUROPEAN INFORMATION
    EC INDEX NO:     016-011-00-9
    TOXIC
    R 23
    TOXIC BY INHALATION.
    R 34
    CAUSES BURNS.
    S 9
    KEEP CONTAINER IN A WELL-VENTILATED PLACE.
    S 26
    IN CASE OF CONTACT WITH EYES, RINSE IMMEDIATELY WITH PLENTY OF
    WATER AND SEEK MEDICAL ADVICE.
    S 36/37/39
    WEAR SUITABLE PROTECTIVE CLOTHING, GLOVES AND EYE/FACE
    PROTECTION.
    S 45
    IN CASE OF ACCIDENT OR IF YOU FEEL UNWELL, SEEK MEDICAL ADVICE
    IMMEDIATELY (SHOW THE LABEL WHERE POSSIBLE).
  REVIEWS, STANDARDS, AND REGULATIONS
    OEL=MAK
    ACGIH TLV-NOT CLASSIFIABLE AS A HUMAN CARCINOGEN  DTLVS* TLV/BEI,1999
    ACGIH TLV-STEL 5 PPM                          DTLVS* TLV/BEI,1999
    ACGIH TLV-TWA 2 PPM                           DTLVS* TLV/BEI,1999
    IARC CANCER REVIEW:ANIMAL LIMITED EVIDENCE    IMEMDT 54,131,1992
    IARC CANCER REVIEW:HUMAN INADEQUATE EVIDENCE  IMEMDT 54,131,1992
    IARC CANCER REVIEW:GROUP 3                    IMEMDT 54,131,1992
    EPA FIFRA 1988 PESTICIDE SUBJECT TO REGISTRATION OR RE-REGISTRATION
     FEREAC 54,7740,1989
    MSHA STANDARD-AIR:TWA 5 PPM (13 MG/M3)
     DTLVS* 3,238,1971
    OSHA PEL (GEN INDU):8H TWA 5 PPM (13 MG/M3)
     CFRGBR 29,1910.1000,1994
    OSHA PEL (CONSTRUC):8H TWA 5 PPM (13 MG/M3)
     CFRGBR 29,1926.55,1994
    OSHA PEL (SHIPYARD):8H TWA 5 PPM (13 MG/M3)
     CFRGBR 29,1915.1000,1993
    OSHA PEL (FED CONT):8H TWA 5 PPM (13 MG/M3)
     CFRGBR 41,50-204.50,1994
    OEL-ARAB REPUBLIC OF EGYPT: TWA 5 PPM (13 MG/M3), JAN1993
    OEL-AUSTRALIA: TWA 2 PPM (5 MG/M3), STEL 5 PPM, JAN1993
    OEL-AUSTRIA: MAK 2 PPM (5 MG/M3), JAN1999
    OEL-BELGIUM: TWA 2 PPM (5.2 MG/M3), STEL 5 PPM (13 MG/M3), JAN1993
    OEL-DENMARK: TWA 2 PPM (5 MG/M3), JAN1999
    OEL-FINLAND: TWA 2 PPM (5 MG/M3), STEL 5 PPM (13 MG/M3), JAN1999
    OEL-FRANCE: VME 2 PPM (5 MG/M3), VLE 5 PPM (10 MG/M3), JAN1999
    OEL-GERMANY: MAK 2 PPM (5 MG/M3), JAN1999
    OEL-HUNGARY: TWA 3 MG/M3, STEL 6 MG/M3, JAN1993
    OEL-JAPAN: OEL PENDING, JAN1999
    OEL-THE NETHERLANDS: MAC-TGG 2 PPM (5 MG/M3), JAN1999
    OEL-NORWAY: TWA 2 PPM (5 MG/M3), JAN1999
    OEL-THE PHILIPPINES: TWA 5 PPM (13 MG/M3), JAN1993
    OEL-POLAND: MAC(TWA) 2 MG/M3, MAC(STEL) 5 MG/M3, JAN1999
    OEL-RUSSIA: STEL 10 MG/M3, SKIN, JAN1993
    OEL-SWEDEN: NGV 2 PPM (5 MG/M3), TKV 5 PPM (13 MG/M3), JAN1999
    OEL-SWITZERLAND: MAK-W 2 PPM (5 MG/M3), KZG-W 4 PPM (10 MG/M3), JAN1999
    OEL-THAILAND: TWA 5 PPM (13 MG/M3), JAN1993
    OEL-TURKEY: TWA 5 PPM (13 MG/M3), JAN1993
    OEL-UNITED KINGDOM: TWA 2 PPM (5.3 MG/M3), STEL 5 PPM (13 MG/M3),
     SEP2000
    OEL IN ARGENTINA, BULGARIA, COLOMBIA, JORDAN, KOREA CHECK ACGIH TLV;
    OEL IN NEW ZEALAND, SINGAPORE, VIETNAM CHECK ACGIH TLV
    NIOSH REL TO SULFUR DIOXIDE-AIR:10H TWA 2 PPM;STEL 5 PPM
     NIOSH* DHHS #92-100,1992
    NOHS 1974: HZD 70860; NIS 85; TNF 6399; NOS 61; TNE 51398
    NOES 1983: HZD 70860; NIS 59; TNF 2465; NOS 58; TNE 55033; TFE 8990
    EPA TSCA SECTION 8(B) CHEMICAL INVENTORY
    EPA TSCA SECTION 8(D) UNPUBLISHED HEALTH/SAFETY STUDIES
    EPA TSCA TEST SUBMISSION (TSCATS) DATA BASE, JANUARY 2001
    NIOSH ANALYTICAL METHOD, 1994: SULFUR DIOXIDE, 6004
    OSHA ANALYTICAL METHOD #ID-107
    OSHA ANALYTICAL METHOD #ID-104 (FOR IMPINGER)
  U.S. INFORMATION
    THIS PRODUCT IS SUBJECT TO SARA SECTION 313 REPORTING REQUIREMENTS.
SECTION 16. - - - - - - - - - - OTHER INFORMATION- - - - - - - - - - - -
    THE ABOVE INFORMATION IS BELIEVED TO BE CORRECT BUT DOES NOT PURPORT TO
    BE ALL INCLUSIVE AND SHALL BE USED ONLY AS A GUIDE. SIGMA, ALDRICH,
    FLUKA SHALL NOT BE HELD LIABLE FOR ANY DAMAGE RESULTING FROM HANDLING
    OR FROM CONTACT WITH THE ABOVE PRODUCT. SEE REVERSE SIDE OF INVOICE OR
    PACKING SLIP FOR ADDITIONAL TERMS AND CONDITIONS OF SALE.
    COPYRIGHT 2001 SIGMA-ALDRICH CO.
    LICENSE GRANTED TO MAKE UNLIMITED PAPER COPIES FOR INTERNAL USE ONLY