{"product_id":"potassium-permanganate-5n-1gal-zp1556-128","title":"Potassium Permanganate 0.5 N, 1 Gallon","description":"\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat it is.\u003c\/strong\u003e This potassium permanganate solution is a 0.5 N (0.1 M) volumetric oxidizing titrant, supplied in a 1-gallon size. It is a deep purple solution for permanganometric titrations of iron, hydrogen peroxide, oxalate, and other reducing agents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNormality and molarity.\u003c\/strong\u003e In acid solution, permanganate is reduced from manganese(VII) to manganese(II), gaining five electrons, so its equivalent weight is one-fifth of its formula weight, 31.61. A 0.5 N solution is therefore 0.1 M, containing about 15.80 g of KMnO4 per liter (calculated).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIts own indicator.\u003c\/strong\u003e Permanganate is intensely purple, while the manganese(II) product is nearly colorless. At the endpoint, the first excess drop turns the solution faint pink, so no separate indicator is needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitrate in sulfuric acid.\u003c\/strong\u003e Permanganate titrations are run in strong sulfuric acid. Hydrochloric and nitric acids can take part in competing redox reactions and reduce accuracy, so sulfuric acid is the standard choice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandardization.\u003c\/strong\u003e Potassium permanganate is not a primary standard, so its solutions are standardized against sodium oxalate or arsenic trioxide, both available as NIST reference materials. Oxalate titrations are typically warmed to about 55 to 60 °C to speed the reaction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStability.\u003c\/strong\u003e Permanganate solutions slowly decompose, a process accelerated by light, heat, organic matter, and manganese dioxide. Brown deposits indicate decomposition. Store the solution in the dark and restandardize regularly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat each milliliter titrates.\u003c\/strong\u003e One milliliter of 0.5 N permanganate oxidizes 0.5 milliequivalent of reductant, equal to 27.92 mg of iron(II), 8.505 mg of hydrogen peroxide, or 33.50 mg of sodium oxalate (calculated from equivalent weights).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhy 0.5 N.\u003c\/strong\u003e The higher strength suits samples rich in reductant, such as iron ores, concentrated peroxide, and oxalate assays, keeping titration volumes practical. It also serves as a stock for preparing weaker solutions by accurate dilution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalculating results.\u003c\/strong\u003e Analyte mass equals the titrant volume in milliliters multiplied by the standardized normality and by the analyte's equivalent weight in milligrams per milliequivalent. For iron(II), the equivalent weight is 55.85; for hydrogen peroxide, 17.01.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhere it is used.\u003c\/strong\u003e Laboratories use 0.5 N permanganate for iron determination in ores and alloys, hydrogen peroxide assays, oxalate and calcium (as oxalate) determinations, and as a stock for preparing weaker permanganate titrants. The 1 gallon size supports QC labs with high titration volumes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; border:1px solid #cfcfcf; margin-bottom:28px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eChemical Name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003ePotassium permanganate, aqueous volumetric solution\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eCAS Numbers\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003e7722-64-7 (potassium permanganate); 7732-18-5 (water)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eEC Number (KMnO4)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003e231-760-3\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eSynonyms\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003ePermanganate of potash, KMnO4 solution\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eFormula (active)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003eKMnO4\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eFormula Weight (active)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003e158.03 g\/mol\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eEquivalent Weight (acid solution)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003e31.61 (molar = 5 x normal)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eConcentration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003e0.5 N (0.1 M)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eKMnO4 Content\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003eAbout 15.80 g\/L (calculated)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eTitration Equivalence\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003e1.00 mL = 27.92 mg Fe(II), 8.505 mg H2O2, or 33.50 mg Na2C2O4 (calculated)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eIndicator\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003eSelf-indicating (faint pink endpoint)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eTitration Medium\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003eSulfuric acid\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003ePrimary Standards\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003eSodium oxalate; arsenic trioxide\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eAppearance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003eDeep purple liquid\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eHazard Profile\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003eOxidizer; stains skin; harmful to aquatic life (confirm on SDS)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003ePackage Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003e1 gallon\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eApplications \/ Common Uses\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIron determination:\u003c\/strong\u003e Titrates iron(II) in ores and alloys.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydrogen peroxide assay:\u003c\/strong\u003e Measures concentrated peroxide strength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOxalate and calcium:\u003c\/strong\u003e Determines oxalate and calcium precipitated as oxalate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStock solution:\u003c\/strong\u003e Dilutes to weaker permanganate titrants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRedox teaching:\u003c\/strong\u003e Demonstrates self-indicating titrations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStorage, Handling \u0026amp; Shipping\u003c\/h4\u003e\n\u003cp\u003eStore tightly closed at room temperature in a dark place, away from reducing agents, organic materials, acids, and combustibles. Light and manganese dioxide deposits speed decomposition, so protect the solution from light and restandardize periodically.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncompatible materials:\u003c\/strong\u003e Reducing agents, organic materials and solvents, combustibles, concentrated acids, and peroxides.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePersonal protection:\u003c\/strong\u003e Safety glasses and gloves; permanganate stains skin and surfaces brown.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpill response:\u003c\/strong\u003e Absorb with inert, non-combustible material; reduce residues with sodium thiosulfate or bisulfite solution before cleanup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirst aid:\u003c\/strong\u003e Eyes: rinse with water for several minutes. Skin: wash thoroughly; brown stains fade over time.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eRelated Categories \u0026amp; Services\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eShop \u003ca href=\"https:\/\/labproinc.com\/collections\/oxidizers\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOxidizers\u003c\/a\u003e for related products in this category.\u003c\/li\u003e\n\u003cli\u003eExplore \u003ca href=\"https:\/\/labproinc.com\/pages\/buffers-standards-solutions\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eBuffers, Standards \u0026amp; Solutions\u003c\/a\u003e and \u003ca href=\"https:\/\/labproinc.com\/collections\/acs-grade-laboratory-chemicals\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eACS Grade Laboratory Chemicals\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/labproinc.com\/pages\/be-a-lab-pro-vmi-program\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eVendor Managed Inventory (VMI) Program\u003c\/a\u003e: Lab Pro can stock, track, and replenish this item on site so it never runs out. Contact info@labproinc.com or 888-452-2776 to set up a VMI assessment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eRelated Articles\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/labproinc.com\/blogs\/news\/potassium-permanganate\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ePotassium Permanganate: How To Handle, Store, \u0026amp; Dispose\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/labproinc.com\/blogs\/chemicals-and-solvents\/ranking-oxidizing-agents-strongest-to-weakest-which-is-best-for-which-tasks\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eRanking Oxidizing Agents Strongest to Weakest: Which is Best For Which Tasks?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/labproinc.com\/blogs\/news\/quantitative-analysis\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eTitration Methods for Precise Chemical Analysis in Labs\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lab Pro Inc","offers":[{"title":"Default Title","offer_id":67674936869013,"sku":"ZP1556-128","price":135.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/2327\/6437\/files\/MainImage_d152a72e-b686-466c-91b2-238d87a2f4d3.png?v=1791892845","url":"https:\/\/checkout.labproinc.com\/products\/potassium-permanganate-5n-1gal-zp1556-128","provider":"Lab Pro Inc Plus","version":"1.0","type":"link"}