: 1305-62-0 1.2 Relevant identified uses of the substance or mixture and uses advised against Identified uses : Laboratorychemicals, Industrial & for professional use only. Calcium Hydroxide Safety Data Sheet according to Federal Register / Vol. Vomiting. 2011. Dentsply Sirona Pty Ltd Chemwatch Hazard Alert Code: 2 Dycal Radiopaque Calcium Hydroxide - Base Paste Chemwatch: 4993-50 Version No: 2.1.1.1 Safety Data Sheet according to WHS and ADG requirements Issue Date: 27/06/2017 Print Date: 04/01/2018 S.GHS.AUS.EN SECTION 1 IDENTIFICATION OF THE SUBSTANCE / MIXTURE AND OF THE COMPANY / UNDERTAKING Eng. CALCIUM HYDROXIDE can be found in 28 products. Government of Canada. After preliminary consultation, the proposed threshold for strong acids and bases has been increased to 3 tonnes with a concentration set at 0.1%. Calcium dihydroxide is a … H318 Causes serious eye damage. Calcium hydroxide solutions can cause chemical burns. EUH070 Toxic by eye contact. This chemical is very corrosive, and it … OELs. NIOSH: Pocket Guide to Chemical Hazards Components Type Value Form Calcium carbonate, TWA 5 mg/m3 Respirable. Repeated or prolonged contact with skin may cause dermatitis. Skin burns. Implementation Guidelines for the Environmental Emergency Regulations 2011. Do NOT induce vomiting. synthetic (CAS 471-34-1) 10 mg/m3 Total Calcium hydroxide (CAS TWA 5 mg/m3 1305-62-0) Biological limit values No biological exposure limits noted for the ingredient(s). US DOT U.S. Dept. 4. HAZARD SUMMARY * Calcium Hydroxide can affect you when breathed in. form salts with inorganic bases such as CALCIUM HYDROXIDE. Calcium hydroxide (CAS TWA 5 mg/m3 1305-62-0) US. Likely hazards to health or the environment. Transport hazard class(es) Hazard classification : 8 14.4. It has a strong base pH and is used for many purposes, often under its more common name, slaked lime. The nitroparaffins, nitromethane, nitropropane, etc. Source. IARC Monographs Database on Cancer Risks to Humans, Guidelines for Carcinogen Risk Assessment, List of Regulated Toxic and Flammable Substances and Thresholds for Accidental Release Prevention. IDENTIFICATION Calcium Hydroxide is a soft, white, powdery material with a Calcium Hydroxide CAS No 1305-62-0 MATERIAL SAFETY DATA SHEET SDS/MSDS. U.S. EPA (U.S. Environmental Protection Agency). Identification Product identifier Mississippi Lime Liquid Calcium Hydroxide (LCH) Other means of identification Product code Liquid Calcium Hydroxide, LCH, Liquid Calcium Hydroxide MP, LCH MP Industrial, Chemical, Construction, Environmental and Water Treatment applications of calcium FIRST-AID MEASURES Routes of Exposure First Aid Instructions news 30:2344 1952]. Wear safety goggles, face shield or eye protection in combination with breathing protection. COMPOSITION AND INFORMATION ON INGREDIENTS Hazardous Components C.A.S. Ecological Toxicity: Toxicity to fish: LC50 - Clarias gariepinus - 33,884 mg/l - 96 h Toxicity to daphnia and other aquatic invertebrates: EC50 - Daphnia magna (Water flea) - 49,1 mg/l - 48 h (OECD Test Guideline 202) 2.3 Human Health Hazard: Inhalation Toxicity. Some potential for hazards to health or the environment. You assume the entire risk of relying on this Information. Environment Canada. 2005. To minimize environmental impacts, many researchers and government agencies emphasize the importance of using smaller quantities of deicers to increase the efficiency of mechanical ice removal instead of melting ice completely in place and producing high volumes of deicer-saturated run off. Calcium hydroxide . Get medical attention in case of uncertainty. IARC (International Agency for Research on Cancer). Summary of Risk Evaluation Framework for Determining Quantity Thresholds and Concentrations for Substances under the Environmental Emergency Regulations set under the Canadian Environmental Protection Act, 1999 (CEPA 1999). Environmental Directorate, Joint Meeting of the Chemicals Committee and the Working Party on Chemicals, Pesticides and Biotechnology, ENV/JM/MONO(2001)6. Reacts violently with acids. Effects of short-term exposure Give nothing to drink. 1. Because calcium hydroxide, solution does not have a vapour pressure greater than 10 mmHg (1.33 kPa) at 25°C (CHEMINFO, 2010), the substance does not have sufficient volatility to constitute an inhalation danger. 2001. with the financial assistance of the European Commission. Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Calcium hydroxide SDS Safety Data Sheet for Calcium hydroxide 102047. 2011. Eng. Decomposes on heating. Safety Data Sheet according to 29CFR1910/1200 and GHS Rev. Following the risk evaluation methodology developed under section 200 of CEPA 1999, the categories (flammability, combustibility, oxidizers, inhalation toxicity, aquatic toxicity, carcinogenicity, corrosiveness, pool fires) having the lowest scientific threshold will be compared against other risk management considerations. Specifications of Calcium Hydroxide. The dry salts are explosive [Chem. One publication by the United States Environmental Protection … Excessive dust generation creates a potential explosion hazard. Page 1 of 7. SECTION XIV - TRANSPORT INFORMATION SEA TRANSPORTATION: IMCO #: Not regulated UN #: Not regulated Substance(s) determined hazard: Not regulated No: N/A 1.PRODUCT IDENTIFICATION. Calcium hydroxide SDS Safety Data Sheet for Calcium hydroxide 102047. Use local exhaust or breathing protection. In 1920, Herman introduced calcium hydroxide to dentistry as a pulp-capping ma-terial but today it is used widely in the field of endodontics [2] [3]. 1305-62-0) was selected for risk evaluation because it is a substance that meets the criteria for corrosive substances as defined by OECD (OECD, 2001) that, if spilled, could be immediately harmful to humans and/or the environment. The new threshold has been harmonized with the Transportation of Dangerous Goods Regulations (TDG) for their Emergency Response Assistance Plan (ERAP) index of 3,000 liters or approximately 3 tonnes (Transport Canada, 2008). H335 May cause respiratory irritation. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. PRODUCT AND COMPANY IDENTIFICATION Product Name: Calcium Hydroxide; Lime CAS#: 1305-62-0 ... environment, and for health and safety purposes. Inhalation risk supplier m-i drilling fluids uk ltd, pocra quay, footdee, aberdeen. In no event shall Supplier be responsible for damages of any nature whatsoever resulting Because calcium hydroxide, solution does not have a vapour pressure greater than 10 mmHg (1.33 kPa) at 25°C (CHEMINFO, 2010), the substance does not have sufficient volatility to constitute an inhalation danger. * Contact can severely irritate and burn the skin and eyes with possible eye damage. Calcium hydroxide, solution (CAS No. Managing Environmental Impact. Calcium dihydroxide is composed of one calcium cation and two hydroxide anions. At ambient temperature, calcium hydroxide ( portlandite) dissolves in pure water to produce an alkaline solution with a pH of about 12.4. low . 2007. Formula: Ca(OH)2 Occupational Exposure Total dust. 77, No. The new proposed threshold is set to 3 tonnes for the following reasons: A “moderate” classification in NEMISIS has some of the following characteristics: there is a risk to endangered or threatened species or their habitat, or a significant life threatening risk to other wildlife; the incident causes significant disruption of public services or property damage and community health is or will be threatened; impacts of the incident on the environment are significant (e.g. This methodology was not used because pH ≤ 2 or pH ≥ 11.5 are considered corrosive to aquatic life. Refer for medical attention . May also have poor ingredient disclosure. Rinse skin with plenty of water or shower. Environment Canada. OECD (Organisation for Economic Co-operation and Development). Calcium hydrate, Caustic lime, Hydrated lime, Slaked lime White, odorless powder. CALCIUM HYDROXIDE TWA 5 mg/m3 US. They neutralize acids exothermically to … This produces flammable/explosive gas (hydrogen - see ICSC 0001). Rinse mouth. Environmental hazards Dangerous for the environment : No Marine pollutant : No Other information : No supplementary information available 14.6. 2006. Refer for medical attention. Environmental hazards Marine pollutant #1 : NAP 14.6. Document Number 94-1556. : 1305-62-0 EINECS EC Number: 215-137-3. Dry skin. Bases are chemically similar to sodium hydroxide (NaOH) or sodium oxide (Na2O). Washington (DC). The solution in water is a medium strong base. 1994. The threshold quantity and its respective concentration will not be finalized until after public consultation. Following the risk evaluation, Environment Canada recommends that this substance be proposed for addition to Schedule 1 of the Environmental Emergency Regulations at a threshold quantity of 3 tonnes with a minimal concentration of 0.1% and at a pH ≥ 11.5. Safety Data Sheet according to 29CFR1910/1200 and GHS Rev. Following the risk evaluation of calcium hydroxide, solution and taking into consideration the quantities in use in Canada, Environment Canada recommends that this substance be proposed for addition to Schedule 1 of the Environmental Emergency Regulations under CEPA 1999 at a threshold quantity of 3 tonnes with a minimum concentration of 0.1% and at a pH ≥ 11.5. Refer for medical attention . [Note: Readily absorbs CO2 from the air to form calcium carbonate.] Proposed thresholds may also be modified based on policy and other considerations as assessed during the public consultation period. In case of fire in the surroundings, use appropriate extinguishing media. of Transportation - Not Regulated. Calcium Hydroxide SDS GHS, MSDS Sheet, Material Safety Data Sheet. The Environmental Emergency Regulations, developed under Part 8 of the Canadian Environmental Protection Act, CEPA), 1999 (Government of Canada, 2011) establishes a list of substances for which fixed facilities must notify Environment Canada that they store or use the substance on-site, by providing notices to Environment Canada, reporting when the substance is released into the environment, and developing an environmental emergency plan (E2 plan) for each substance stored or used at a fixed facility at or above specified threshold quantities. # EC# IUPAC Name WT % Calcium Hydroxide 1305-62-0 / 215-137-3 calcium dihydroxide 100 Refer to Section 16 for the full text of the GHS and H phrases and EUClassifications and R Phrases. At least some ingredient disclosure. SECTION XIII - DISPOSAL CONSIDERATIONS Dispose of in accordance with Federal, State and Local regulations. Calcium hydroxide, solution is practically non-bioaccumulative according to our risk evaluation methodology (Environment Canada, 2015). To determine if a substance is a candidate to be added to the Environmental Emergency Regulations, Environment Canada has developed a risk evaluation methodology based on the following hazard categories: For more information on the methodology for setting threshold quantities in the Environmental Emergency Regulations, please refer to Summary of Risk Evaluation Framework for Determining Quantity Thresholds and Concentrations for Substances under the Environmental Emergency Regulations. Canadian Centre for Occupational Health and Safety (CCOHS). MSDS Sheet – Calcium Hydroxide. FDA Calcium hydroxide is generally recognized as safe (GRAS) by FDA 21 CFR 184.1205. In no event shall Supplier be responsible for damages of any nature whatsoever resulting List of Regulated Toxic and Flammable Substances and Thresholds for Accidental Release Prevention. 8.2.2 Environmental exposure controls Avoid release into environment; calcium hydroxide may cause pH variation. Calcium hydroxide-based preparations present minimal hazard in the quantities provided. Risk Assessment Forum. 58 / Monday, March 26, 2012 / Rules and Regulations 02/28/2015 EN (English) 3 First‐aid measures after inhalation : If breathed in, move person into fresh air. Product Identification. Print Share on: Evidence. You assume the entire risk of relying on this Information. Safety Data Sheet Calcium Hydroxide/Lime SDS Section 1. Information concerning the quantities of calcium hydroxide, solution (CAS No. Human Health: substances that are toxic by inhalation, are carcinogenic, or are corrosive. MATERIAL SAFETY DATA SHEET. calcium dihydroxide, calcium dihyrdroxide, calcium hydrate, calcium hydroxide, calcium hydroxide (ca(oh)2), hydrated lime, and lime water Cancer Cancer: Ingredients linked to cancer in government, industry or academic studies or assessments. The substance is irritating to the respiratory tract. For example, the threshold will be compared to other provincial and federal legislation or voluntary programs that may already provide adequate management of the risk from an environmental emergency. Material Safety Data Sheet or SDS for Calcium hydroxide 102047 from Merck for download or viewing in the browser. * Breathing Calcium Hydroxide can irritate the nose, throat and lungs causing coughing, wheezing and/or shortness of breath. Environment Canada. Calcium hydroxide is a white odourless powder with the chemical formula Ca(OH) 2 Because calcium hydroxide, solution does not have an identified flash point (no flash point data were available during the data gathering process) and decomposes before reaching its boiling point (Genium, 2007), this substance does not have the possibility of a vapour cloud explosion. SPILLS Sweep up dry spillage where possible and minimize flushing with water. Record Number 10. Genium. Pain. This product has been replaced by 239232|Sigma-Aldrich - Calcium hydroxide, ACS reagent, ≥95.0% | Ca(OH)2 Registered on December 8, 2011, 2014. Burning sensation. Genium Group Inc. CAL5160. Fresh air, rest. Environment Canada: Ottawa (ON). The proposed threshold at 3 tonnes has been extended for bases as well. Packing group Packing group : III 14.5. CALCIUM HYDROXIDE: ICSC: 0408: Calcium dihydroxide Calcium hydrate Hydrated lime Slaked lime: September 1997: CAS #: 1305-62-0 EC Number: 215-137-3 ACUTE HAZARDS PREVENTION FIRE FIGHTING; FIRE & EXPLOSION: Not combustible. Signal word Danger. 3 Effective date : 12.14.2014 Page 2 of 7 Calcium Hydroxide, Created by Global Safety Management, Inc. -Tel: 1-813-435-5161 - www.gsmsds.com Because calcium hydroxide, solution is not classified in any group of International Agency for Research on Cancer (IARC, 2014) or the U.S. Environmental Protection Agency (U.S. EPA, 2005), and because the substance does not have an identified half-life (no half-life data were available during the data gathering process), no threshold is set for the carcinogenicity of this substance. The nitroparaffins, nitromethane, nitropropane, etc. Synonyms: Calcium hydrate; Calcium Hydroxide or Slaked Lime CAS No. Roughness. Ulceration and scarring of skin are some of the most commonly observed hazards of NaOH. UN proper shipping name : Corrosive liquid, basic inorganic, N.O.S. Calcium hydroxide contains alkaline material potentially toxic to aquatic life at high concentrations. Calcium Hydroxide is harmful to aquatic environment at low concentrations. They neutralize acids exothermically to … Effects of long-term or repeated exposure If not breathing, give artificial respiration. ab11 5dq t -44 (0)1224-584336 f -44 (0)1224-576119 SAFETY DATA SHEET 1. 843-861. Hazard classification & labelling Hazard classification and labelling. Therefore, no threshold is set for the inhalation toxicity to humans. 2010. PROP 65 The substance has a measured pH equal to or greater than 11.5, therefore a threshold of 3 tonnes applies. Environmental Health: substances that are: corrosive, persistent, bioaccumulative, or aquatically toxic. H318 Causes serious eye damage. The concentration at 0.1% will result in a pH ≤ 2 or pH ≥ 11.5 for strong bases or acids. Material Safety Data Sheet or SDS for Calcium hydroxide 102047 from Merck for download or viewing in the browser. Calcium hydrate, Caustic lime, Hydrated lime, Slaked lime White, odorless powder. Summary of Risk Evaluation Framework for Determining Quantity Thresholds and Concentrations for Substances under the Environmental Emergency Regulations, Implementation Guidelines for the Environmental Emergency Regulations 2011, Environment Canada. For enquiries, contact us. form salts with inorganic bases such as CALCIUM HYDROXIDE. In: Proceedings of the Thirty-third Arctic and Marine Oilspill Program Technical Seminar on Environmental Contamination and Response. Abdominal cramps. 2015. 8.3. The dry salts are explosive [Chem. Calcium hydroxide has been used by dentists in the clinical practice for over a century [1]. A proposed threshold of 3 tonnes with a minimum concentration of 0.1% and at a pH ≥ 11.5 is assigned for calcium hydroxide, solution based on its assessed corrosiveness. This produces calcium oxide. Flash Point:N/A Flammable Limits:N/A Fire Extinguishing Media:Considered non-combustible. Calcium hydroxide (CAS TWA 5 mg/m3 1305-62-0) US. benign, health . Even if the quantity of a substance in use is below the threshold quantity indicated in the Environmental Emergency Regulations, Environment Canada recommends that emergency planning be applied to this substance in order to minimize, or prevent, any impacts on humans or the environment in the event of a release of the substance. pp. Special Fire Fighting Procedures:Fire fighters should wear full protective clothing and self-contained breathing apparatus. [Note: Readily absorbs CO2 from the air to form calcium carbonate.] CDC - NIOSH Pocket Guide to Chemical Hazards - Calcium hydroxide One spill of sulfuric acid was identified as having a “major” impact at 4.5 tonnes. CDC - NIOSH Pocket Guide to Chemical Hazards - Calcium hydroxide Environmental Emergency Regulations, Canadian Environmental Protection Act, 1999. Repeated or prolonged inhalation of dust particles may cause effects on the lungs. 2010. According to the National Enforcement and Emergencies Management Information System and Intelligence System (NEMISIS) database, hydrochloric acid and sulphuric acid were both on record as having a “moderate” impact on air, land and fresh water after a spill of 3 tonnes. Washington (DC). Get medical attention in case of uncertainty. Redness. Environment Canada. Cesium hydroxide, solution is not capable of causing a pool fire. In case of fire in the surroundings, use appropriate extinguishing media. ab11 5dq t -44 (0)1224-584336 f -44 (0)1224-576119 4. EPA/630/P-03/001F. Physical: flammable and combustible or oxidizing substances, or those having a potential to cause vapour cloud explosions or pool fires. Then store and dispose of according to local regulations. Calcium hydroxide-based preparations present minimal hazard in the quantities provided. safety data sheet lime (calcium hydroxide) 1 identification of the substance/preparation and company/undertaking product name lime (calcium hydroxide) synonyms, trade namescalcium hydroxide application ph modifier. PREVENT DISPERSION OF DUST! Calcium hydroxide. U.S. EPA (U.S. Environmental Protection Agency). news 30:2344 1952]. You will not receive a reply. Ketcheson K, Shrives J. Ecological Information. Even a saturated solution of calcium hydroxide is so dilute that it is not classed as IRRITANT, despite pH = 12.4. © ILO and WHO 2017. (Calcium hydroxide mixture) 14.3. Safety Data Sheet Calcium Hydroxide/Lime SDS Section 1. Product name : Calcium Hydroxide CAS-No. 1305-62-0 Calcium Hydroxide 39% Irritant (Xi) R 36 / 38 Skin irritation; 2 Eye irritation; 2 4.0 First Aid Measures 4.1 Special Instructions Show this safety data sheet to medical personnel. However, limewater is usually made in schools by adding excess solid calcium hydroxide (or oxide) to water. Decomposes at 580°CRelative density (water = 1): 2.2 Solubility in water: none. 1.3 Details of the supplier of the safety data sheet Company : Central Drug House (P) Ltd 7/28 Vardaan House New Delhi-10002 INDIA 1305-62-0) in use in Canada indicates that the substance exists in commerce. Therefore, no threshold is set for this substance as a result of its potential for flammability or combustibility. requires further investigation). Consult a physician. Physical State; Appearance Fever, sneezing, runny nose, sore throat, and pneumonia are some of the severe consequences of coming in contact with this chemical. Use media appropriate for surrounding fire. 31. OELs. Calcium Hydroxide Hydrated Lime Slaked Lime SDS GHS, MSDS Sheet. For more information regarding the determination of thresholds, please refer to the Implementation Guidelines for the Environmental Emergency Regulations 2011 (Environment Canada, 2011). Medical observation is indicated. COLOURLESS CRYSTALS OR WHITE POWDER. Grade D. High Concern. The ‘Hazard classification and labelling’ section shows the hazards of a substance based on the standardised system of statements and pictograms established under the CLP (Classification Labelling and Packaging) Regulation. IARC Monographs Database on Cancer Risks to Humans. Unusual Fire and Explosion Hazards:Not combustible. This quantity for spills of 3 tonnes in NEMISIS is also the same as the quantity recommended by TDG for their ERAP for sulphuric acid, nitric acid, hydrobromic acid and perchloric acid (Environment Canada, 2015). Attacks many metals in the presence of water. The substance is corrosive to the eyes and skin. 1305-62-0 Calcium Hydroxide 39% Irritant (Xi) R 36 / 38 Skin irritation; 2 Eye irritation; 2 4.0 First Aid Measures 4.1 Special Instructions Show this safety data sheet to medical personnel. Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed. Health issue . Calcium hydroxide is the exothermic product of calcium oxide and water, according to Darrell D. Ebbing and Steven D. Gammon's "General Chemistry." For additional information on toxicity from scientific journals or registration documents, see the "Additional Resources for Toxicity " section of the chemical detail page. Tennessee. At high pH value (see common ion effect ), its solubility drastically decreases. OSHA Table Z-1-A (29 CFR 1910.1000) (1989) CALCIUM HYDROXIDE - TWA 15 mg/m3 US. The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. Product Name:Calcium Hydroxide (Hydrated Lime) EPA Reg. FIRST-AID MEASURES Routes of Exposure First Aid Instructions This behavior is relevant to cement pastes. # EC# IUPAC Name WT % Calcium Hydroxide 1305-62-0 / 215-137-3 calcium dihydroxide 100 Refer to Section 16 for the full text of the GHS and H phrases and EUClassifications and R Phrases. COMPOSITION AND INFORMATION ON INGREDIENTS Hazardous Components C.A.S. Tennessee. safety data sheet lime (calcium hydroxide) 1 identification of the substance/preparation and company/undertaking product name lime (calcium hydroxide) synonyms, trade namescalcium hydroxide application ph modifier. Molecular mass: 74.1 International Agency for Research on Cancer, World Health Organization. 9.0 Physical and Chemical Properties 9.1 Characteristics 9.1.1 Appearance / Color / Physical state Fine, white powder 9.1.2 Odor Odorless 9.2 Important health, safety and environmental information 9.2.1 pH pH > 12 Sweep spilled substance into covered containers. Calcium hydroxide. 3 Effective date : 12.14.2014 Page 2 of 7 Calcium Hydroxide, Created by Global Safety Management, Inc. -Tel: 1-813-435-5161 - www.gsmsds.com Contains Calcium Hydroxide 3. Registered on December 8, 2011. Appropriate engineering controls Appropriate engineering controls : Ensure good ventilation of the work station. Comparison of Threshold Quantities for Substances with Final AEGL-2 and IDLH Values under CEPA’s Environmental Emergency Regulations. NIOSH: Pocket Guide to Chemical Hazards Components Type Value Form Calcium carbonate, TWA 5 mg/m3 Respirable. Chemical dangers Federal Register, 59(20). Limewater . Guidelines for Carcinogen Risk Assessment. Calcium hydroxide, solution is classified as beingpractically non-persistent in water according to our risk evaluation methodology (Environment Canada, 2015). Environmental exposure controls : Avoid release to the environment. Bases are chemically similar to sodium hydroxide (NaOH) or sodium oxide (Na2O). Level of Concern . The inorganic compound is of ionic crystalline chemical character. Routes of exposure Mike Wye & Associates, Health & Safety September 2017 Page 2 of 13 Material Data Safety Sheet: Calcium Dihydroxide Version: September 2017 2 HAZARDS IDENTIFICATION 2.1 Classification of the substance 2.1.1 Classification according to Regulation (EC) 1272/2008 STOT Single Exp.3, Route of exposure: Inhalation Skin Irritation 2 Eye damage 1 Hydrated Lime, Hydrated Lime, Slaked Lime CAS No Merck for download calcium hydroxide environmental hazards viewing in the of! ) to water during the public consultation period lenses if easily possible ), then refer for medical attention risk... Summary * Calcium hydroxide 102047 2008 ) Calcium hydroxide SDS GHS, MSDS.... Skin may cause effects on the lungs solution of Calcium hydroxide, solution is not classed as IRRITANT, pH! Behalf of ILO and WHO, with the financial assistance of the work station 5dq t -44 ( )! And combustible or oxidizing substances, or those having a potential to cause vapour cloud explosions or pool.... Lime, Slaked Lime white, odorless POWDER: particulate filter respirator adapted the. As Calcium hydroxide Hydrated Lime ) EPA Reg often under its more common Name, Lime. For flammability or combustibility, footdee, aberdeen ( 1989 ) Calcium hydroxide ( NaOH or. Repeated exposure repeated or prolonged contact with skin may cause effects on the lungs spillage where possible and flushing! Local regulations than 11.5, therefore a threshold of 3 tonnes has been by! Used by dentists in the surroundings, use appropriate extinguishing media several minutes ( remove contact lenses if possible! N/A Flammable Limits: N/A Flammable Limits: N/A fire extinguishing media risk Evaporation at is. 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