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https://fscimage.fishersci.com/msds/25580.htm <br />Odor: odorless <br />pH: 4.4 -6 (5% aq soln) <br />Vapor Pressure: Not available. <br />Vapor Density: Not available. <br />Evaporation Rate:Not available. <br />Viscosity: Not available. <br />Boiling Point: Not available. <br />Freezing /Melting Point:100 deg C <br />Decomposition Temperature:> 500 deg C <br />Solubility: Soluble in water <br />Specific Gravity/ Density: 3.54 g /cm3 @ 25 °C <br />Molecular Formula:ZnSO4.7H2O <br />Molecular Weight:287.55 <br />Chemical Stability: Stable under normal temperatures and pressures. Efflorescent (tending to lose <br />water molecules of hydration) in dry air. <br />Conditions to Avoid: Excess heat. <br />Incompatibilities with Other Materials: Strong bases. <br />Hazardous Decomposition Products: Oxides of sulfur, toxic fumes of zinc oxide. <br />Hazardous Polymerization: Will not occur. <br />Section 11 - Toxicological Information's <br />RTECS #: <br />CAS# 7446 -20 -0: ZH5300000 <br />CAS# 7733 -02 -0: ZH5260000 <br />LD50 /LC50: <br />CAS# 7446 -20 -0: <br />Oral, mouse: LD50 = 200 mg /kg; <br />Oral, rat: LD50 = 1260 mg /kg; <br />CAS# 7733 -02 -0: <br />Draize test, rabbit, eye: 420 ug Moderate; <br />Oral, mouse: LD50 = 245 mg /kg; <br />Oral, rabbit: LD50 = 2 gm /kg; <br />Carcinogenicity: <br />CAS# 7446 -20 -0: Not listed by ACGIH, IARC, NTP, or CA Prop 65. <br />CAS# 7733 -02 -0: Not listed by ACGIH, IARC, NTP, or CA Prop 65. <br />Epidemiology: No data available. <br />Teratogenicity: No data available. <br />Reproductive Effects: No data available. <br />Mutagenicity: No data available. <br />Neurotoxicity: No data available. <br />Other Studies: <br />Ecotoxicity: No data available. No information available. <br />Environmental: Very toxic to aquatic organisms. <br />https: // fscimage .fishersci.com /msds /25580.htm (3 of 5) [4/24/2012 2:42:49 PM] <br />