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Safety Data Sheet according to Regulation (EC) No 1907/2006Page 1 of 17LOCTITE 660 RETAINING COMPOUND known as Loctite(R)660 Quick Metal(R)SDS No. : 164196V007.4Revision: 22.05.2017printing date: 13.09.2017Replaces version from: 28.06.2016SECTION 1: Identification of the substance/mixture and of the company/undertaking1.1. Product identifierLOCTITE 660 RETAINING COMPOUND known as Loctite(R) 660 Quick Metal(R)Contains:Hydroxypropyl methacrylateCumene hydroperoxideMaleic acidAcetic acid, 2-phenylhydrazide1.2. Relevant identified uses of the substance or mixture and uses advised againstIntended use:Anaerobic Adhesive1.3. Details of the supplier of the safety data sheetHenkel LtdWood Lane EndHP2 4RQHemel HempsteadGreat BritainPhone:Fax-no.: 44 1442 278000 44 1442 278071ua-productsafety.uk@henkel.com1.4. Emergency telephone number24 Hours Emergency Tel: 44 (0)1442 278497SECTION 2: Hazards identification2.1. Classification of the substance or mixtureClassification (CLP):Serious eye irritationH319 Causes serious eye irritation.Skin sensitizerH317 May cause an allergic skin reaction.Specific target organ toxicity - single exposureH335 May cause respiratory irritation.Target organ: respiratory tract irritation2.2. Label elementsLabel elements (CLP):Category 2Category 1Category 3

MSDS-No.: 164196V007.4LOCTITE 660 RETAINING COMPOUND known as Loctite(R) 660Quick Metal(R)Page 2 of 17Hazard pictogram:Signal word:WarningHazard statement:H317 May cause an allergic skin reaction.H319 Causes serious eye irritation.H335 May cause respiratory irritation.Precautionary statement:***For consumer use only: P101 If medical advice is needed, have product container orlabel at hand. P102 Keep out of reach of children. P501 Dispose of waste and residues inaccordance with local authority requirements***Precautionary statement:PreventionP261 Avoid breathing vapours.P280 Wear protective gloves.Precautionary statement:ResponseP333 P313 If skin irritation or rash occurs: Get medical advice/attention.P337 P313 If eye irritation persists: Get medical advice/attention.2.3. Other hazardsNone if used properly.Not fulfilling Persistent, Bioaccumulative and Toxic (PBT), very Persistent and very Bioaccumulative (vPvB) criteria.SECTION 3: Composition/information on ingredients3.2. MixturesGeneral chemical description:Anaerobic Sealant

MSDS-No.: 164196V007.4LOCTITE 660 RETAINING COMPOUND known as Loctite(R) 660Quick Metal(R)Declaration of the ingredients according to CLP (EC) No 1272/2008:Hazardous componentsCAS-No.Hydroxypropyl methacrylate27813-02-1EC NumberREACH-Reg 5- 50 %Skin Sens. 1H317Eye Irrit. 2H319Acute Tox. 4; DermalH312STOT RE 2H373Acute Tox. 4; OralH302Org. Perox. EH242Acute Tox. 3; InhalationH331Aquatic Chronic 2H411Skin Corr. 1BH314Cumene hydroperoxide80-15-9201-254-71- 2,5 %Maleic acid110-16-7203-742-501-2119488705-250,1- 1 %Acute Tox. 4; OralH302Acute Tox. 4; DermalH312Skin Irrit. 2H315Skin Sens. 1H317Eye Irrit. 2H319STOT SE 3H335Methacrylic acid79-41-4201-204-401-2119463884-260,1- 1 %N,N-Diethyl-p-toluidine613-48-9210-345-00,1- 1 %Acute Tox. 4; OralH302Acute Tox. 3; DermalH311Acute Tox. 4; InhalationH332Skin Corr. 1AH314Acute Tox. 3; OralH301Acute Tox. 3; DermalH311Acute Tox. 3; InhalationH331STOT RE 2H373Aquatic Chronic 3H412Acetic acid, 2-phenylhydrazide114-83-0204-055-30,1- 1 %Acute Tox. 3; OralH301Skin Irrit. 2H315Skin Sens. 1H317Eye Irrit. 2H319STOT SE 3; InhalationH335Carc. 2H351N,N-dimethyl-o-toluidine609-72-3210-199-80,1- 1 %Acute Tox. 3; InhalationH331Acute Tox. 3; DermalH311Acute Tox. 3; OralH301STOT RE 2Page 3 of 17

MSDS-No.: 164196V007.4LOCTITE 660 RETAINING COMPOUND known as Loctite(R) 660Quick Metal(R)H373Aquatic Chronic 3H412For full text of the H - statements and other abbreviations see section 16 "Other information".Substances without classification may have community workplace exposure limits available.SECTION 4: First aid measures4.1. Description of first aid measuresInhalation:Move to fresh air. If symptoms persist, seek medical advice.Skin contact:Rinse with running water and soap.Obtain medical attention if irritation persists.Eye contact:Rinse immediately with plenty of running water (for 10 minutes), seek medical attention from a specialist.Ingestion:Rinse mouth, drink 1-2 glasses of water, do not induce vomiting, consult a doctor.4.2. Most important symptoms and effects, both acute and delayedSKIN: Rash, Urticaria.EYE: Irritation, conjunctivitis.RESPIRATORY: Irritation, coughing, shortness of breath, chest tightness.4.3. Indication of any immediate medical attention and special treatment neededSee section: Description of first aid measuresSECTION 5: Firefighting measures5.1. Extinguishing mediaSuitable extinguishing media:Carbon dioxide, foam, powder5.2. Special hazards arising from the substance or mixtureIn the event of a fire, carbon monoxide (CO), carbon dioxide (CO2) and nitrogen oxides (NOx) can be released.5.3. Advice for firefightersWear self-contained breathing apparatus and full protective clothing, such as turn-out gear.Additional information:In case of fire, keep containers cool with water spray.SECTION 6: Accidental release measures6.1. Personal precautions, protective equipment and emergency proceduresAvoid skin and eye contact.6.2. Environmental precautionsDo not let product enter drains.6.3. Methods and material for containment and cleaning upFor small spills wipe up with paper towel and place in container for disposal.For large spills absorb onto inert absorbent material and place in sealed container for disposal.Page 4 of 17

MSDS-No.: 164196V007.4LOCTITE 660 RETAINING COMPOUND known as Loctite(R) 660Quick Metal(R)6.4. Reference to other sectionsSee advice in section 8SECTION 7: Handling and storage7.1. Precautions for safe handlingUse only in well-ventilated areas.Avoid skin and eye contact.Prolonged or repeated skin contact should be avoidedSee advice in section 8Hygiene measures:Wash hands before work breaks and after finishing work.Do not eat, drink or smoke while working.Good industrial hygiene practices should be observed.7.2. Conditions for safe storage, including any incompatibilitiesRefer to Technical Data Sheet7.3. Specific end use(s)Anaerobic AdhesivePage 5 of 17

MSDS-No.: 164196V007.4LOCTITE 660 RETAINING COMPOUND known as Loctite(R) 660Quick Metal(R)Page 6 of 17SECTION 8: Exposure controls/personal protection8.1. Control parametersOccupational Exposure LimitsValid forGreat BritainIngredient [Regulated substance]Silicon dioxide112945-52-5[SILICA, AMORPHOUS, INHALABLEDUST]Silicon dioxide112945-52-5[SILICA, AMORPHOUS, RESPIRABLEDUST]Methacrylic acid79-41-4[METHACRYLIC ACID]Methacrylic acid79-41-4[METHACRYLIC ACID]mg/m3Value type6Time Weighted Average(TWA):EH40 WEL2,4Time Weighted Average(TWA):EH40 WEL40143Short Term ExposureLimit (STEL):EH40 WEL2072Time Weighted Average(TWA):EH40 WELppmmg/m3Value type6Time Weighted Average(TWA):IR OEL2,4Time Weighted Average(TWA):IR OEL2070Time Weighted Average(TWA):IR OEL40140Short Term ExposureLimit (STEL):IR OELppmShort term exposure limitcategory / RemarksRegulatory listOccupational Exposure LimitsValid forIrelandIngredient [Regulated substance]Silicon dioxide112945-52-5[SILICA, AMORPHOUS, TOTALINHALABLE DUST]Silicon dioxide112945-52-5[SILICA, AMORPHOUS, RESPIRABLEDUST]Methacrylic acid79-41-4[METHACRYLIC ACID]Methacrylic acid79-41-4[METHACRYLIC ACID]Short term exposure limitcategory / RemarksRegulatory list

MSDS-No.: 164196V007.4LOCTITE 660 RETAINING COMPOUND known as Loctite(R) 660Quick Metal(R)Page 7 of 17Predicted No-Effect Concentration (PNEC):Name on listEnvironmental ExposureCompartment periodMethacrylic acid, monoester with propane1,2-diol27813-02-1Methacrylic acid, monoester with propane1,2-diol27813-02-1Methacrylic acid, monoester with propane1,2-diol27813-02-1Methacrylic acid, monoester with propane1,2-diol27813-02-1Methacrylic acid, monoester with propane1,2-diol27813-02-1Methacrylic acid, monoester with propane1,2-diol27813-02-1Methacrylic acid, monoester with enzylhydroperoxide80-15-9Maleic acid110-16-7Maleic acid110-16-7aqua(freshwater)Maleic acid110-16-7Maleic acid110-16-7Maleic acid110-16-7Maleic acid110-16-7Maleic acid110-16-7Methacrylic acid79-41-4Methacrylic acid79-41-4Methacrylic acid79-41-4Methacrylic acid79-41-4Valuemg/lppm0,904 mg/laqua (marinewater)0,904 mg/lsewagetreatment water)10 mg/lRemarksmg/kg0,972 mg/l6,28 mg/kgsediment(marine water)6,28 mg/kgsoil0,727mg/kgaqua(freshwater)0,0031mg/laqua Sewagetreatment plant0,031 mg/l0,35 mg/lsediment(freshwater)0,023mg/kgsediment(marine treatment plant(STP)aqua (marinewater)sediment(marine water)soil0,1 mg/laqua(freshwater)aqua (marinewater)sewagetreatment plant(STP)aqua(intermittentreleases)0,82 mg/l0,4281mg/l0,334mg/kg44,6 mg/l0,01 mg/l0,0334mg/kg0,0415mg/kg0,82 mg/l10 mg/l0,82 mg/lothers

MSDS-No.: 164196V007.4LOCTITE 660 RETAINING COMPOUND known as Loctite(R) 660Quick Metal(R)Methacrylic acid79-41-4soilPage 8 of 171,2 mg/kgDerived No-Effect Level (DNEL):Name on listApplicationAreaWorkersRoute oralWorkersinhalationWorkersdermalMaleic acid110-16-7WorkersdermalMaleic acid110-16-7WorkersdermalMaleic acid110-16-7WorkersdermalMaleic acid110-16-7WorkersinhalationMaleic acid110-16-7WorkersinhalationMaleic acid110-16-7WorkersinhalationMaleic acid110-16-7WorkersinhalationMethacrylic acid79-41-4WorkersInhalationMethacrylic acid79-41-4WorkersInhalationMethacrylic acid79-41-4WorkersdermalMethacrylic acid79-41-4GeneralpopulationInhalationMethacrylic acid79-41-4GeneralpopulationInhalationMethacrylic acid79-41-4GeneralpopulationdermalMethacrylic acid, monoester with propane1,2-diol27813-02-1Methacrylic acid, monoester with propane1,2-diol27813-02-1Methacrylic acid, monoester with propane1,2-diol27813-02-1Methacrylic acid, monoester with propane1,2-diol27813-02-1Methacrylic acid, monoester with enzylhydroperoxide80-15-9Maleic acid110-16-7Health EffectLong termexposure systemic effectsLong termexposure systemic effectsLong termexposure systemic effectsLong termexposure systemic effectsLong termexposure systemic effectsLong termexposure systemic effectsAcute/short termexposure - localeffectsLong termexposure - localeffectsAcute/short termexposure systemic effectsLong termexposure systemic effectsAcute/short termexposure - localeffectsLong termexposure systemic effectsLong termexposure - localeffectsAcute/short termexposure systemic effectsLong termexposure - localeffectsLong termexposure systemic effectsLong termexposure systemic effectsLong termexposure - localeffectsLong termexposure systemic effectsLong termexposure systemic effectsExposureTimeValue4,2 mg/kg14,7 mg/m32,5 mg/kg8,8 mg/m32,5 mg/kg6 mg/m30,55 mg/cm20,04 mg/cm258 mg/kg3,3 mg/kg3 mg/m33 mg/m33 mg/m33 mg/m388 mg/m329,6 mg/m34,25 mg/kg6,55 mg/m36,3 mg/m32,55 mg/kgRemarks