Potassium Hydroxide

SIGMA-ALDRICHsigma-aldrich.comSAFETY DATA SHEETaccording to Regulation (EC) No. 1907/2006Version 4.0 Revision Date 12.03.2010Print Date 06.06.2010GENERIC EU MSDS - NO COUNTRY SPECIFIC DATA - NO OEL DATA1. IDENTIFICATION OF THE SUBSTANCE/MIXTURE AND OF THE COMPANY/UNDERTAKINGProduct name : Potassium hydroxideProduct Number : 484016Brand : Sigma-AldrichCompany : Sigma-Aldrich Pte Ltd(Co. Registration No. 199403788W)1 Science Park Road#02-14 The Capricorn, S'pore Sci. PkIISINGAPORE 117528SINGAPORETelephone : +6567791200Fax : +6567791822Emergency Phone # :2. HAZARDS IDENTIFICATIONClassification of the substance or mixtureAccording to Regulation (EC) No1272/2008Skin corrosion (Category 1A)Acute toxicity, Oral (Category 4)According to European Directive 67/548/EEC as amended.Causes severe burns. Harmful if swallowed.Label elementsPictogramSignal wordHazard statement(s)H314H302Precautionary statement(s)P280P305 + P351 + P338P310Hazard symbol(s)CR-phrase(s)R22R35S-phrase(s)S26S36/37/39DangerCauses severe skin burns and eye damage.Harmful if swallowed.Wear protective gloves/protective clothing/eye protection/face protection.IF IN EYES: Rinse cautiously with water for several minutes. Removecontact lenses, if present and easy to do. Continue rinsing.Immediately call a POISON CENTER or doctor/physician.CorrosiveHarmful if swallowed.Causes severe burns.In case of contact with eyes, rinse immediately with plenty of water andseek medical advice.Wear suitable protective clothing, gloves and eye/face protection.Sigma-Aldrich - 484016 Page 1 of 5

S45Other hazards - noneIn case of accident or if you feel unwell, seek medical advice immediately(show the label where possible).3. COMPOSITION/INFORMATION ON INGREDIENTSSynonyms : Caustic potashFormula : HKOMolecular Weight : 56,11 g/molCAS-No. EC-No. Index-No. Classification ConcentrationPotassium hydroxide1310-58-3 215-181-3 019-002-00-8 Skin Corr. 1A; Acute Tox. 4;H314, H302C, R22 - R35For the full text of the H-Statements mentioned in this Section, see Section 16.-4. FIRST AID MEASURESGeneral adviceConsult a physician. Show this safety data sheet to the doctor in attendance.If inhaledIf breathed in, move person into fresh air. If not breathing give artificial respiration Consult a physician.In case of skin contactTake off contaminated clothing and shoes immediately. Wash off with soap and plenty of water. Consult aphysician.In case of eye contactRinse thoroughly with plenty of water for at least 15 minutes and consult a physician.If swallowedDo NOT induce vomiting. Never give anything by mouth to an unconscious person. Rinse mouth with water.Consult a physician.5. FIRE-FIGHTING MEASURESSuitable extinguishing mediaUse extinguishing measures that are appropriate to local circumstances and the surrounding environment.Special protective equipment for fire-fightersWear self contained breathing apparatus for fire fighting if necessary.Further informationGives off hydrogen by reaction with metals.The product itself does not burn.6. ACCIDENTAL RELEASE MEASURESPersonal precautionsUse personal protective equipment. Avoid dust formation. Avoid breathing dust. Ensure adequate ventilation.Evacuate personnel to safe areas.Environmental precautionsDo not let product enter drains.Methods and materials for containment and cleaning upPick up and arrange disposal without creating dust. Keep in suitable, closed containers for disposal.7. HANDLING AND STORAGEPrecautions for safe handlingAvoid formation of dust and aerosols.Sigma-Aldrich - 484016 Page 2 of 5

Provide appropriate exhaust ventilation at places where dust is formed.Conditions for safe storageStore in cool place. Keep container tightly closed in a dry and well-ventilated place.Absorbs carbon dioxide (CO2) from air.Air sensitive. strongly hygroscopic8. EXPOSURE CONTROLS/PERSONAL PROTECTIONPersonal protective equipmentRespiratory protectionWhere risk assessment shows air-purifying respirators are appropriate use a full-face particle respiratortype N100 (US) or type P3 (EN 143) respirator cartridges as a backup to engineering controls. If therespirator is the sole means of protection, use a full-face supplied air respirator. Use respirators andcomponents tested and approved under appropriate government standards such as NIOSH (US) or CEN(EU).Hand protectionThe selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and thestandard EN 374 derived from it.Handle with gloves.Eye protectionFace shield and safety glassesSkin and body protectionChoose body protection according to the amount and concentration of the dangerous substance at thework place.Hygiene measuresHandle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and atthe end of workday.9. PHYSICAL AND CHEMICAL PROPERTIESAppearanceFormflakesSafety datapH 13,5Melting point 361 °CBoiling point 1.320 °CFlash pointIgnition temperatureLower explosion limitUpper explosion limitno data availableno data availableno data availableno data availableVapour pressure 1 hPa at 719 °C1 hPa at 714 °CDensityWater solubility2,044 g/cm3soluble10. STABILITY AND REACTIVITYChemical stabilityHeat of solution is very high, and with limited amounts of water, violent boiling may occur Stable underrecommended storage conditions.Sigma-Aldrich - 484016 Page 3 of 5

Conditions to avoidDo not heat above melting point.Materials to avoidNitro compounds, Organic materials, Magnesium, Copper, Water, reacts violently with:, Metals, Light metals,Contact with aluminum, tin and zinc liberates hydrogen gas. Contact with nitromethane and other similar nitrocompounds causes formation of shock-sensitive salts., vigorous reaction with:, Alkali metals, Halogens, Azides,AnhydridesHazardous decomposition productsHazardous decomposition products formed under fire conditions. - Potassium oxides11. TOXICOLOGICAL INFORMATIONAcute toxicityLD50 Oral - rat - 273 mg/kgSkin corrosion/irritationSkin - rabbit - Severe skin irritation - 24 hSerious eye damage/eye irritationEyes - rabbit - Eye irritation - 24 hRespiratory or skin sensitizationno data availableGerm cell mutagenicityno data availableCarcinogenicityIARC: No component of this product present at levels greater than or equal to 0.1% is identified asprobable, possible or confirmed human carcinogen by IARC.Reproductive toxicityno data availableSpecific target organ toxicity - single exposureno data availableSpecific target organ toxicity - repeated exposureno data availableAspiration hazardno data availablePotential health effectsInhalationMay be harmful if inhaled. Material is extremely destructive to the tissue of themucous membranes and upper respiratory tract.IngestionHarmful if swallowed. Causes severe burns.SkinMay be harmful if absorbed through skin. Causes severe skin burns.EyesCauses severe eye burns.Additional InformationRTECS: TT210000012. ECOLOGICAL INFORMATIONToxicityToxicity to fish LC50 - Gambusia affinis (Mosquito fish) - 80 mg/l - 96 hPersistence and degradabilityno data availableBioaccumulative potentialno data availableMobility in soilSigma-Aldrich - 484016 Page 4 of 5

no data availablePBT and vPvB assessmentno data availableOther adverse effectsno data available13. DISPOSAL CONSIDERATIONSProductObserve all federal, state, and local environmental regulations. Contact a licensed professional wastedisposal service to dispose of this material.Contaminated packagingDispose of as unused product.14. TRANSPORT INFORMATIONADR/RIDUN-Number: 1813 Class: 8Packing group: IIProper shipping name: POTASSIUM HYDROXIDE, SOLIDIMDGUN-Number: 1813 Class: 8 Packing group: II EMS-No: F-A, S-BProper shipping name: POTASSIUM HYDROXIDE, SOLIDMarine pollutant: NoIATAUN-Number: 1813 Class: 8Packing group: IIProper shipping name: Potassium hydroxide, solid15. REGULATORY INFORMATIONThis safety datasheet complies with the requirements of Regulation (EC) No. 1907/2006.16. OTHER INFORMATIONText of H-code(s) and R-phrase(s) mentioned in Section 3Acute Tox. Acute toxicityH302Harmful if swallowed.H314Causes severe skin burns and eye damage.Skin Corr. Skin corrosionCCorrosiveR22Harmful if swallowed.R35Causes severe burns.Further informationCopyright 2010 Sigma-Aldrich Co. License granted to make unlimited paper copies for internal use only.The above information is believed to be correct but does not purport to be all inclusive and shall be usedonly as a guide. The information in this document is based on the present state of our knowledge and isapplicable to the product with regard to appropriate safety precautions. It does not represent any guaranteeof the properties of the product. Sigma-Aldrich Co., shall not be held liable for any damage resulting fromhandling or from contact with the above product. See reverse side of invoice or packing slip for additionalterms and conditions of sale.Sigma-Aldrich - 484016 Page 5 of 5