Fluorosilicic Acid - Fluoride-Free Water

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Ref: MSDS/F06. Rev. 208/12/04MATERIAL SAFETYDATA SHEETChemifloc LtdFLUOROSILICIC ACIDSECTION 1IDENTIFICATIONTrade Marks and Synonyms (if any)Fluorosilicic AcidPhysical FormColourless Liquid.Responsible Person :Chemifloc Ltd,Smithstown Ind. Estate,Shannon,Co. Clare. 353 61-708699SECTION 2Chemical Names and SynonymsFluosilicic Acid. Silicate-hexafluorodihydrogen.Hydrofluosilicic AcidMolecular FormulaH2SiF6Emergency Telephone :Chemifloc Ltd, 353 61-708699INFORMATION ON INGREDIENTSIngredientsConcentration10.5 - 47.0%63.0 - 89.5% 1.5%H2SiF6H2OHFSECTION 3ClassificationCAS No.Corrosive,8, PG II.16961-83-4NRCorrosive,8, PG II7664-39-3HAZARDS IDENTIFICATIONFluorosilicic Acid is an acute irritant to the skin, eyes and mucous membranes and lungs. Theacid and its vapour are moderately toxic. Flouride poisioning effects may be delayed up to 24hours, depending upon the flouride ion concentrationOccupational Exposure Limit (OEL)TLV (as F):ppm: 2.5mg/m3 (as TWA).SECTION 4PHYSICAL AND CHEMICAL PROPERTIESAppearance and Odour :Colourless liquid with pungent odour.pH0Boiling Point @ 100 kPa110oCAutoignition (deg. C)NoneSolubility in WaterTotally SolubleConc:3 1.5% as HFMelting PointFlash Point (deg. C)Specific Gravity- 11. 6oCNot Applicable1. 085 - 1.495 @ 15oCFlammable Limit (% by Vol. in Air) Vapour PressureNone3kPa3Solubility in Other SolventsOxidising PropertiesN/AN/AAccording to EC Directive 91/155/EECPage 1 of 5

Ref: MSDS/F06. Rev. 208/12/04SECTION 5STABILITY AND REACTIVITYStability:Fluorosilicic Acid is stable in an aqueous solution.Reactivity:Incompatible with strong alkalis and strong concentrated acids. Reacts with oxidising agents,combustible solids and organic peroxides.It forms hydrogen fluoride (HF) on contact with concentrated acids.It produces hydrogen on contact with metals, e.g. steel, nickel, aluminium.Conditions and Materials to avoid:Metal, glass, stoneware, alkali and strong concentrated acids.Hazardous Decomposition Products:When heated to decomposition (105oC) it emits highly toxic and corrosive fumes of HydrogenFluoride, Silicon Tetrafluoride and Hydrogen gas.SECTION 6Acute:TOXICITY DATAFluorosilicic Acid is an acute irritant to the skin, eyes and mucousmembranes and lungs. The acid and its vapour are moderately toxic.Fluoride poisoning effects may be delayed up to 24 hours, depending uponthe fluoride ion concentration.Ingestion:Severe irritant. Ingestion may cause burns of the gastrointestinal tractleading to vomiting, acidocis, bloody diarrhoea, wheezing, laryngitis,shortness of breath, headache and shock. Circulatory system may beaffected with symptoms of shock, rapid, weak or no pulse, severehypotension and pumonary changes with dyspnea, and emphysaema. Insome cases, necrosis and haemorrhage of the gastrointestinal tract, liverdamage and death may occur. Scarring of the gastrointestinal tract mayoccur in non-fatal cases.Eye:Severe irritant. Contact may result in lacrimation, irritation, pain, rednessand conjunctivitis. Prolonged contact - corneal burns and possiblepermanent damage.Skin:Severe irritant. Prolonged contact may result in irritation, itching andpossible skin rash.Inhalation;Severe irritant to the respiratory tract. Over exposure at high levels mayresult in mucous membrane irritation of the nose and throat withcoughing, shortness of breath and pulmonary oedema.Chronic:Chronic exposure to fluoride present in Fluorosilicic Acid may lead tosclerosis of the bones, calcification of ligaments, loss of weight, anorexiaand teeth disorders. At low levels, chronic exposure can lead to nose bleedsand sinus problems.HealthInformation:OSHA Permissible Exposure Limit (PEP): 2.5 mg/m3 (as F)ACGIH Threshold Limit Value (TLV): 2.5 mg/m3 (as F)Toxicity Data:LD50 200mg/kg (Oral-Guinea Pig)According to EC Directive 91/155/EECPage 2 of 5

Ref: MSDS/F06. Rev. 208/12/04SECTION 7FIRST AID MEASURESIngestion:If conscious, give the exposed person large quantities of water. Administercalcium gluconate solution or milk. Seek immediate medical attention.Eye Contact:Immediately irrigate with copious amounts of water, while holding eyelidsopen for at least 15 minutes. Seek immediate medical attention.Skin:Wash affected area with copious amounts of water for at least 15 minutes.Apply calcium gluconate gel to the affected area, rub in until locally free ofpain and then continue for a further 15 minutes. Apply a dressing soakedin 20% (m/m) calcium gluconate solution. Seek immediate medicalattention.Inhalation:Remove affected person from exposure to a well ventilated area. Keepwarm and at rest. Administer orally six effervescent calcium pills (400 mgcalcium per pill) dissolved in water. Seek immediate medical attention.Further MedicalAdvice:Following severe exposure the patient should be kept under medicalattention for 48 hours as delayed pulmonary oedema may develop.SECTION 8FIRE AND EXPLOSIVE HAZARD DATAFlammability:Fluorosilicic Acid is non flammable and does not support combustion.Fire Fighting Protective Equipment:Wear NIOSH approved self-contained acid suit and/or approved respirator.Fire Extinguishing Data:There are no restrictions on extinguishing media in fire situations.Unusual Fire and Explosion Hazards:Reacts with many metals to produce flammable and explosive hydrogen gas. Keep containerscool with water, using spray nozzles, as decomposition will occur above 105oC and producetoxic and corrosive fumes of fluoride.SECTION 9General Precautions :PERSONAL PROTECTIONEye and skin protection should be used when handlingFluorsilicic Acid.Ventilation Requirements :Respiratory Protection :Adequate ventilation is essential in buildingsNot normally required. Breathing apparatuswhere the material is handled or stored.must be worn if levels exceed the recommendedlimit.Protective ClothingEye protection :PVC or rubber gloves, boots and an acidGoggles or full face maskproof suit are essential.According to EC Directive 91/155/EECPage 3 of 5

Ref: MSDS/F06. Rev. 208/12/04SECTION 10HANDLING AND STORAGEHandling:Do not inhale fumes and prevent skin contact. If pungent, irritating odour can be detected,over-exposure is occurring. Eye wash and safety shower should be available in all acid handlingareas.Avoid contact with incompatible materials.Storage:Store in a cool, dry, well ventilated area away from sources of ignition. Do not store in glass orstoneware. Bulk quantities should be stored in plastic (uPVC, Polypropylene or Polythene) orrubber - lined tanks. Tanks should be vented and fitted with an overflow pipe. Tanks should bebunded to contain spillage. For smaller packages double skinned HDPE plastic containers areacceptable.Ventilation:Provide adequate and/or local ventilation to maintain vapours below 2.5 mg/m3 (as F).SECTION 11SPILLAGE/ACCIDENTAL RELEASESmall Spillage :Wash away with large quantities of water.Large Spillage :If fumes are evolved wear respiratory protection. Bund large spillageswith sand, earth etc. and pump away, neutralise with soda ash thendilute with water (spray) and flush away with large amounts of waterafter neutralisation. Inform the local water authority if product hasentered public drains or waterways.Personal Precautions :Wear full protective clothing.Neutralising Chemicals :Hydrated Lime or Soda Ash.SECTION 12WASTE DISPOSALNeutralise with Lime and landfill in accordance with local regulations.SECTION 13ENVIRONMENTAL INFORMATIONEnvironmental Fate and DistributionHigh tonnage material produced in wholly contained systems.Used in the fluoridation of water supplies.The substance is soluble in water.Persistence and DegradationDegrades on heating.Effect on Effluent TreatmentLarge discharges may contribute to the acidification of effluent treatmentsystems and will injure treatment organisms.ToxicityLarge discharges may contribute to the acidification of water and soil andwill injure aquatic life and soil micro - organisms.According to EC Directive 91/155/EECPage 4 of 5

Ref: MSDS/F06. Rev. 208/12/04SECTION 14REGULATORY INFORMATIONEEC Classification:Class 8, Hazard Label: 8Risk Phrases:Causes burns (R 34)Safety Phrases:In case of contact with eyes, rinse immediately with plenty of waterand seek medical treatment. (S 26).Take off immediately all contaminated clothing. (S 27).In case of accident or if you feel unwell, seek medical adviceimmediately (show the label where possible). (S 45).In caseSECTION 15UN No.IMDG ClassTRANSPORT INFORMATION17788,IISECTION 16UN Pack. GroupIIICAO/IATA ClassADR/RID Class8ADR/RID Item8,II9bOTHER INFORMATIONThe information provided in this Safety Data Sheet is correct to the best of our knowledge, informationand belief at the date of its publication. The information given is designed only as a guidance for safehandling, use, processing, storage, transportation, disposal and release, and is not to be considered awarranty or quality specification. The information relates only to the specific material designated andmay not be valid for such material used in combination with any other materials or in any processunless specified in the text.According to EC Directive 91/155/EECPage 5 of 5

Title: Microsoft Word - Fluorosilicic Acid.doc Author: eamon Created Date: 5/31/2005 1:58:02 PM

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