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EXTOXNET PIP-ZIRAM Page 3 of 4 <br /> Environmental Fate: <br /> . Breakdown in soil and groundwater: Ziram has not been detected in groundwater [19]. In soils with medium to <br /> high content of soil organic matter, ziram will be moderately bound. A field half-life of 30 days has been estimated <br /> for ziram [21], indicating a low to moderate persistence. <br /> . Breakdown in water: Of the metallic dithiocarbamate fungicides, ziram is the most stable. Because the compound <br /> is toxic to bacteria, biodegradation in sediment may be rather slow, or occur only at very low concentrations. If <br /> ziram gets to the bottom of bodies of water, it may persist for months [19]. <br /> . Breakdown in vegetation: On plants, persistent breakdown products were formed. A significant amount of carbon <br /> disulfide was released during the breakdown process. The leaf surface was slightly acidic,probably due to dissolved <br /> carbon dioxide [4]. <br /> Physical Properties: <br /> . Appearance: Ziram is an odorless powder at room temperature [3]. <br /> . Chemical Name: zinc bis(dimethyldithiocarbamate) [3] <br /> . CAS Number: 137-30-4 <br /> . Molecular Weight: 305.83 <br /> . Water Solubility: 65 mg/L [3] <br /> . Solubility in Other Solvents: s. in alcohol, acetone,benzene, and carbon tetrachloride [3] <br /> . Melting Point: 240-244 C [3] <br /> • Vapor Pressure: Negligible at room temperature [3] <br /> . Partition Coefficient: Not Available <br /> . Adsorption Coefficient: 400 (estimated) [21] <br /> Exposure Guidelines: <br /> . ADI: 0.02 mg/kg/day [33] <br /> . MCL: Not Available <br /> . RfD: Not Available <br /> . PEL: Not Available <br /> . HA: Not Available <br /> . TLV: Not Available <br /> Basic Manufacturer. <br /> FMC Corporation <br /> Agricultural Chemicals Group <br /> 1735 Market Street <br /> Philadelphia, PA 19103 <br /> . Phone: 215-299-6565 <br /> . Emergency: 800-331-3148 <br /> References: <br /> References for the information in this PIP can be found in Reference List Number 4 <br /> http://extoxnet.orst.edu/pips/ziram.htm <br />