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Attachment B, Technical Revision to the May Day Mine Permit, September 12, 2009. <br />AER00 350 xaMhale <br />1.ISDS: 0000290 Date: 10r=2004 <br />19 of 35 <br />Papa 4 or A <br />Boiling Point: i Not applicable <br />Matting Point: <br />Vapor Pressure: 255 - 280 °C 491- 536 °F <br />Not applicable <br />Specific Gravity: Not available <br />Vapor Density: Not applicable <br />Percent Volatile (% by wt.): -1.5 <br />PH: + Not applicable <br />Saturation In Air (% By Voi.j: Not applicable <br />Evaporation Rate: Not applicable <br />Solubility In Water. 'j 35 9/100 g@ 20°C- <br />Volatile Organic Content: Not available <br />Flash Point: Not applicable <br />Flammable Limits (%By Vol): Not applicable <br />Autoignition Temperature: 120 °C 248 °F (value for carbon disulfide) <br />Decomposition Temperature: >131 - 280 °C 267.8 - 536 "F <br />Partltion coefficient (n- Not available <br />octanolitwater): <br />Odor Threshold: ; See Section 2 for exposure limits. <br />10. STABILITY.JAND REACTIVITY <br />Stability: Stable <br />Conditions To Avoid: Keep water and moist air out of container. Exposure of the solid xanthate to heat <br /> or moisture and heating or aging of xanthate solutions. Keep container in a cool <br /> , <br />well-ventilated area. Containers filled with this product should be kept closed <br /> when not in use. Avoid prolonged exposure to heat; avoid strong acids, alkalies <br /> and oxidizing agents. <br />Polymerization: Will not occur <br />Conditions To Avoid: None known <br />Materials To Avoid: Strong acids, oxidizing agents, moisture. <br />Hazardous Decomposition carbon monoxide <br />Products: carbon dioxide <br /> oxides of sulfur (includes sulfur di and tri oxides) <br /> carbon disulfide <br /> hydrogen sulfide <br />11. TOXICOLOGICAL INFORMATION <br />i <br />Toxicological information for the product is found under Section 3. HAZARDS IDENTIFICATION. <br />Toxicological information on the regulated components of this product is as follows: <br />Potassium hydroxide has an acute oral (rat) LD50 value of 273 mglkg. Acute overexposure to potassium hydroxide <br />or dusts causes severe respiratory Irritation. Potassium hydroxide is severely irritating to the eyes and skin. <br />Potassium sulfide may cause eye and stein irritation. Under acidic conditions, potassium sulfide can decompose to <br />produce flammable poisonous hydrogen sulfide gas. <br />i <br />Potassium 3 methylbutyt xanthate has an estimated acute oral (rat) LD50 and acute dermal (rabbit) LD50 values of > <br />1,000 mgtkg and > 500 mg/kg, respectively, based on similar materials. Direct contact with this material may cause <br />moderate eye and skin irritation. Airborne dust may cause significant eye, skin or respiratory tract irritation. <br />4 <br />