1,2-Butanedithiol      Revision number: 5    
  SAFETY DATA SHEET

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Section 1. IDENTIFICATION
  Product name:        1,2-Butanedithiol    
    
  Revision number:        5    

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Section 2. HAZARDS IDENTIFICATION
  GHS classification
  PHYSICAL HAZARDS
    Category 4
  Flammable liquids
  HEALTH HAZARDS
    Category 2
  Skin corrosion/irritation
  Serious eye damage/eye irritation        Category 2A    
    Not classified
  ENVIRONMENTAL HAZARDS
  GHS label elements, including precautionary statements
  Pictograms or hazard symbols
  Signal word        Warning    
  Hazard statements        Combustible liquid    
    Causes skin irritation
    Causes serious eye irritation
  Precautionary statements:
    Keep away from flames and hot surfaces.
  [Prevention]
    Wash hands thoroughly after handling.
    Wear protective gloves and eye/face protection.
  [Response]        IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses,    
    if present and easy to do. Continue rinsing.
    If eye irritation persists: Get medical advice/attention.
    IF ON SKIN: Gently wash with plenty of soap and water.
    If skin irritation occurs: Get medical advice/attention.
    Take off contaminated clothing and wash before reuse.
  [Storage]        Store in a well-ventilated place. Keep cool.    
  [Disposal]        Dispose of contents/container through a waste management company authorized by    
    the local government.

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Section 3. COMPOSITION/INFORMATION ON INGREDIENTS
  Substance/mixture:        Substance    
  Components:        1,2-Butanedithiol    
  Percent:        >97.0%(GC)    
    16128-68-0
  CAS Number:
  Synonyms:        1,2-Dimercaptobutane    
  1,2-Butanedithiol

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Section 3. COMPOSITION/INFORMATION ON INGREDIENTS
  Chemical Formula:        C4H10S2    

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Section 4. FIRST AID MEASURES
  Inhalation:        Remove victim to fresh air and keep at rest in a position comfortable for breathing.    
    Get medical advice/attention if you feel unwell.
  Skin contact:        Remove/Take off immediately all contaminated clothing. Gently wash with plenty of    
    soap and water. If skin irritation or rash occurs: Get medical advice/attention.
  Eye contact:        Rinse cautiously with water for several minutes. Remove contact lenses, if present    
    and easy to do. Continue rinsing. If eye irritation persists: Get medical
    advice/attention.
    Get medical advice/attention if you feel unwell. Rinse mouth.
  Ingestion:
  Protection of first-aiders:        A rescuer should wear personal protective equipment, such as rubber gloves and air-    
    tight goggles.

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Section 5. FIRE-FIGHTING MEASURES
    Dry chemical, foam, water spray, carbon dioxide.
  Suitable extinguishing
  media:
  Unsuitable extinguishing Solid streams of water
  media:
  Specific hazards arising Take care as it may decompose upon combustion or in high temperatures to
  from the chemical:        generate poisonous fume.    
  Precautions for firefighters: Fire-extinguishing work is done from the windward and the suitable fire-extinguishing
    method according to the surrounding situation is used. Uninvolved persons should
    evacuate to a safe place. In case of fire in the surroundings: Remove movable
    containers if safe to do so.
  Special protective        When extinguishing fire, be sure to wear personal protective equipment.    
  equipment for firefighters:

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Section 6. ACCIDENTAL RELEASE MEASURES
  Personal precautions,        Use personal protective equipment. Keep people away from and upwind of spill/leak.    
  protective equipment and Ensure adequate ventilation. Entry to non-involved personnel should be controlled
  emergency procedures: around the leakage area by roping off, etc.
  Environmental precautions: Prevent product from entering drains.
  Methods and materials for Absorb spilled material in a suitable absorbent (e.g. rag, dry sand, earth, saw-dust).
  containment and cleaning In case of large amount of spillage, contain a spill by bunding. Adhered or collected
  up: material should be promptly disposed of, in accordance with appropriate laws and
    regulations.
  Prevention of secondary Remove all sources of ignition. Fire-extinguishing devices should be prepared in
    case of a fire. Use spark-proof tools and explosion-proof equipment.
  hazards:

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Section 7. HANDLING AND STORAGE
  Precautions for safe handling
  Technical measures:        Handling is performed in a well ventilated place. Wear suitable protective equipment.    
    Prevent generation of vapour or mist. Keep away from flames and hot surfaces. Take
    measures to prevent the build up of electrostatic charge. Use explosion-proof
    equipment. Wash hands and face thoroughly after handling.
    Use a closed system, ventilation.
  Advice on safe handling: Avoid contact with skin, eyes and clothing.
  Conditions for safe storage, including any
  incompatibilities
  Storage conditions:        Keep container tightly closed. Store in a cool, dark and well-ventilated place.    
    Store under inert gas.
    Store away from incompatible materials such as oxidizing agents.
    Air-sensitive
  Packaging material:        Comply with laws.    
  1,2-Butanedithiol

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Section 8. EXPOSURE CONTROLS / PERSONAL PROTECTION
  Engineering controls:        Install a closed system or local exhaust as possible so that workers should not be    
    exposed directly. Also install safety shower and eye bath.
  Personal protective equipment
  Respiratory protection: Vapor respirator. Follow local and national regulations.
  Hand protection:        Protective gloves.    
    Safety glasses. A face-shield, if the situation requires.
  Eye protection:
  Skin and body protection: Protective clothing. Protective boots, if the situation requires.

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Section 9. PHYSICAL AND CHEMICAL PROPERTIES
  Physical state (20°C):        Liquid    
    Clear
  Form:
  Colour:        Colorless - Very pale yellow    
    No data available
  Odour:
  pH: No data available
  Melting point/freezing point:No data available
  Boiling point/range:        77°C/3.7kPa    
  Flash point:        No data available    
  Flammability or explosive
  limits:
  Lower:        No data available    
  Upper:        No data available    
  Relative density:        1.04    
  Solubility(ies):
  [Water]        No data available    
    No data available
  [Other solvents]

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Section 10. STABILITY AND REACTIVITY
  Chemical stability:        Stable under proper conditions.    
  Possibility of hazardous No special reactivity has been reported.
  reactions:
  Conditions to avoid:        Open flame    
  Incompatible materials: Oxidizing agents
  Hazardous decomposition Carbon monoxide, Carbon dioxide, Sulfur oxides
  products:

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Section 11. TOXICOLOGICAL INFORMATION
  Acute Toxicity:        No data available    
  Skin corrosion/irritation: No data available
  Serious eye        No data available    
  damage/irritation:
  Germ cell mutagenicity: No data available
  Carcinogenicity:
  IARC =        No data available    
    No data available
  NTP =
  Reproductive toxicity:        No data available    

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Section 12. ECOLOGICAL INFORMATION
  Ecotoxicity:
  Fish:        No data available    
  Crustacea:        No data available    
  Algae:        No data available    
  Persistence / degradability: No data available
    No data available
  Bioaccumulative
  potential(BCF):
  Mobility in soil
  Log Pow:        No data available    
  1,2-Butanedithiol

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Section 12. ECOLOGICAL INFORMATION
  Soil adsorption (Koc): No data available
  Henry's Law        No data available    
  constant(PaM3/mol):

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Section 13. DISPOSAL CONSIDERATIONS
    Recycle to process, if possible. Consult your local regional authorities. You may be able to burn in a chemical
    incinerator equipped with an afterburner and scrubber system. Observe all federal, state and local regulations when
    disposing of the substance.

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Section 14. TRANSPORT INFORMATION
    Does not correspond to the classification standard of the United Nations
  Hazards Class:
  UN-No:        Not listed    

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Section 15. REGULATORY INFORMATION
  Safe management ordinance of dangerous chemical product (State Council announces on January 26, 2002
  and revised on February 16,2011): Safe use and production, the storage of a dangerous chemical, transport,
    loading and unloading were prescribed.

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SECTION 16 - ADDITIONAL INFORMATION
N/A