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General Oxidizer Safety

General Oxidizer Safety. Lab Safety Meeting August 27 th , 2010. What are oxidizers?. Defined as: Chemicals capable of evolving oxygen at room temperature or with slight heating. Chemicals capable of receiving electrons from a substance being oxidized

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General Oxidizer Safety

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  1. General Oxidizer Safety Lab Safety Meeting August 27th, 2010

  2. What are oxidizers? • Defined as: • Chemicals capable of evolving oxygen at room temperature or with slight heating. • Chemicals capable of receiving electrons from a substance being oxidized MAIN HAZARD: COMBUSTION PROMOTING AGENTS! GENERALLY CORROSIVE! • 4 classes: • Class 1: Causes slight increase in burning rate, no spontaneous ignition • Class 2: Moderate increase in burning rate or may cause spontaneous ignition of combustible material it comes into contact with • Class 3: Severe increase in burning rate. Undergoes vigorous burning when contaminated or or exposed to heat • Class 4: Undergoes explosive reaction when contaminated, or exposed to heat, physical shock, or friction. Spontaneous ignition of combustibles

  3. Typical Oxidizers • Class 1 • All Inorganic nitrates (unless otherwise classified) • All Inorganic nitrites (unless otherwise classified) • Ammonium persulfate • Barium peroxide • Calcium peroxide • Hydrogen peroxide solutions (greater than 8% up to 27.5%) • Lead dioxide Lithium hypochlorite (39% or less available chlorine) • Lithium peroxide • Magnesium peroxide • Manganese dioxide • Nitric acid (40% concentration or less) • Perchloric acid solutions (less than 50% by weight) • Potassium dichromate • Potassium percarbonate • Potassium persulfate • Sodium carbonate peroxide • Sodium dichloro-s-triazinetrionedihydrate • Sodium dichromate • Sodium perborate (anhydrous) • Sodium perboratemonohydrate • Sodium perboratetetrahydrate • Sodium percarbonate • Sodium persulfate • Strontium perioside • Zinc peroxide • Class 2 • Barium bromate • Barium chlorate • Barium hypochlorite • Barium perchlorate • Barium permanganate • 1-Bromo-3-chloro-5,5-dimethylhydantoin • Calcium chlorate • Calcium chlorite • Calcium hypochlorite (50% or less by weight) • Calcium perchlorate • Calcium permanganate • Chromium trioxide (Chromic acid) • Copper chlorate • Halane(1,3-Dichloro-5,5-dimethylhydantoin) • Hydrogen peroxide (greater than 27.5% up to 52% percent) • Lead perchlorate • Lithium chlorate • Lithium hypochlorite (more than 39% available chlorine) • Lithium perchlorate • Magnesium bromate • Magnesium chlorate • Magnesium perchlorate • Mercurouschlorate • Nitric acid (more than 40% but less than 86%) • Perchloricacid solutions (more than 50% but less 60%) • Potassium perchlorate • Potassium permanganate • Silver peroxide • Sodium chlorite (40% or less by weight) • Sodium perchlorate • Sodium perchloratemonohydrate • Sodium permanganate • Sodium peroxide • Strontium chlorate • Strontium perchlorate • Strontium peroxide • Thallium chlorate • Trichloro-s-triazinetrione (Trichloroisocyanuric acid) • Urea hydrogen peroxide • Zinc bromate • Zinc chlorate • Zinc permanganate • Class 3 • Ammonium dichromate • Calcium hypochlorite (over 50% by weight) • Chloricacid (10% maximum concentration) • Hydrogen peroxide solutions (greater than 52% up to 91%) • Mono-(trichloro)-tetra-(monopotassiumdichloro)-penta-s-triazinetrione) • Nitric acid, fuming (more than 86% concentration) • Perchloricacid solutions (60% to 72% by weight) • Potassium bromate • Potassium chlorate • Potassium dichloro-s-triazinetrione (Potassiumdichloroiso-cyanurate) • Sodium bromate • Sodium chlorate • Sodium chlorite (over 40% by weight) • Sodium dichloro-s-triazinetrione (sodium dichloroisocyanurate) • Class 4 • Ammonium perchlorate (particle size greater than 15microns) • Ammonium permanganate • Guanidine nitrate • Hydrogen peroxide solutions (greater than 91%) • Tetranitromethane

  4. Safety Measures • Recommended PPE: safety goggles/face shield, gloves, lab coats • No open toed shoes! • If reaction is potentially explosive, or if you’re not sure, work in a fume hood • Store in a cool, dry place isolated from organic or combustible materials and strong reducing agents such as zinc, alkaline metals, and formic acid • Strong oxidizing agents such as perchloric acid should be stored in a separate secondary container • Unbreakable secondary containment (i.e. PVC) is critical for transportation • Don’t forget to consult MSDS!

  5. Unexpected Direct Exposure! • If an acid is splashed onto bare skin rinse for 15-20 minutes • If splashed in eyes, irrigate with eye wash station for 15-20 minutes • If splashed onto clothing, remove immediately (don’t be modest) and rinse off skin areas that might have been exposed • Don’t forget to consider the safety showers • Seek help: • Fires/Accidents dial 911 (from a cell phone: 574-631-5555) • Spills dial 1-5037 (Risk Management and Safety) • After hour spills dial 911

  6. Sources • http://safety.science.tamu.edu/oxidizers.html • http://safety.dri.edu/LabSafety/CHP_generic_ox.pdf • http://www.greatamericaninsurance.com/docs/lp_data_guides/F13669.pdf • http://www.flinnsci.com/Sections/Safety/chemicalSafety/L1040-1041_HS_LAB_SAFETY_ART.pdf • http://en.wikipedia.org/wiki/Corrosive_substance

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