Sodium Tetrathiocarbonate

Action/Use:

Fumigant

Use: For grape phylloxera, plant parasitic nematodes, and various soilborne pathogens causing root rot diseases.

Chemistry

Properties: Orange liquid with a characteristic odor resembling rotten eggs.

Environmental Guidelines

Degradation/metabolism: Rapidly degrades in the soil, releasing carbon disulfide gas which in turn is rapidly dissipated, hence minimizing the potential for groundwater contamination. Routes of dissipation include evaporation and biological oxidation. The latter produces carbonate and sulfate, both of which are plant nutrients. Dissipation by the combined mechanisms is complete within 4-7 days in most agricultural soils

Hazards: Fish: Moderately to slightly toxic. Bird: Slightly toxic to practically non-toxic. Bee: Relatively nontoxic

Water Solubility: Very soluble

Safety Guidelines

Signal Word: DANGER (32% solution)

Toxicity Class: I

Toxicity: (Rat): 32% solution: Oral LD₅₀ (24 hr) 631 mg/kg; Inhalation LC₅₀ (4 hr) 4.73 g/m³. (Rabbit): Dermal LD ₅₀ >2 g/kg; severe dermal irritation; moderate eye irritation

Handling/storage Cautions: Causes severe burns and eye irritation; harmful if inhaled. May be fatal if swallowed. Contact with acids can release poisonous hydrogen sulfide and carbon disulfide gases. Vapor may ignite. Keep away from all sources of ignition. Keep container tightly closed. Use with adequate ventilation. Do not breathe vapor or mist. Do not get in eyes, on skin, or on clothing. Do not taste or swallow. Wash thoroughly after handling. Wear appropriate personal protective equipment. Do not use or store below 0�C because it will crystallize (to re-solutionize, do not heat above 65�C). A tank that has contained this material should be cleaned, degassed, and checked before it is entered. Equipment should be thoroughly flushed before repairs or disassembly. Do not store or transport in equipment with aluminum, brass, tin, or zinc alloys. Do not use polyurethane

Spill Control/cleanup: Liquid will not burn but vapor may ignite. Keep all sources of ignition away from spill/release. Use non-sparking tools and explosion-proof equipment. Stay upwind and away from spill/release. Isolate danger area and keep unauthorized personnel out. Stop spill/release if it can be done with minimal risk. Prevent spilled material from entering sewers, storm drains, other unauthorized treatment drainage systems, and natural waterways. Dike far ahead of spill for later recovery or disposal. Use water sparingly to reduce disposal requirements. Spilled material may be absorbed into an appropriate absorbent material. Notify appropriate federal, state, and local authorities. Immediate cleanup of any spill is recommended

Product/waste Disposal: Material may be disposed of as a hazardous waste (characteristic reactivity; contains sulfides which, when exposed to pH conditions between 2 and 12.5, can generate toxic gases, vapors, or fumes). However, a procedure is available for oxidizing the product to a solution of sodium sulfate and sodium carbonate. State and local requirements for waste disposal may be more restrictive or otherwise different from federal regulations. Consult state and local regulations regarding the proper disposal of this material

Protective Clothing: Coveralls over long-sleeved shirt and long pants. Waterproof gloves. Chemical-resistant footwear plus socks. Protective eyewear. Approved respirator.