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8. 8 of 8 DuraTray II Powder Section 16 - Additional Information Continued NATIONAL FIRE PROTECTION ASSOCIATION (NFPA) HAZARD IDENTIFICATION RATING: HEALTH: 1 FLAMMABILITY: 1 REACTIVITY: 0 PERSONAL PROTECTIVE EQUIPMENT: Gloves and Safety Glasses or Chemical Splash Goggles. NATIONAL FIRE PORTECTION ASSOCIATION (NFPA) HAZARD IDENTIFICATION RATING: HEALTH: 1 FLAMMABILITY: 1 REACTIVITY: 0 ABBREVIATIONS: NA: Not Applicable ND: Not Determined NE: Not Established ppm: parts per million G: Gallon mg: Milligram L: Liter gm: Gram mol: Mole kg: Kilogram μ: Micro mm: Millimeter p Pico Pa: Pascals LC: Lethal Concentration LD: Lethal Dose TC: Toxic Concentration TD: Toxic Dose BOD: Biological Oxygen Demand COD: Chemical Oxygen Demand Lo: Lowest ThOD: Theoretical Oxygen Demand Tlm: Threshold Limit H: Hours M: Months D: Days Y: Years W: Weeks ACGIH: American Conference of Governmental Industrial Hygienist CPR: Controlled Product’s Regulation DSL: Canadian Domestic Substances List NDSL: Canadian Non - domestic Substance List IARC: International Agency for Research for Cancer NOEL: No Observed Effect Level NOAEL: No Observed Adverse Effect Level OSHA: Occupational Safety and Health Administration PEL: Permissible Exposure Limit TLV: Threshold Limit Value THIS MATERIAL SAFETY DATA SHEET IS PREPARED IN COMPLIANCE WITH FEDERAL REGULATIONS (29 CFR 1910.1200), THE COMMONWEALTH OF PENNSYLVANIA REGULATIONS (TITLE 34. CHAPTERS 301 - 323) AND CANADIAN WHM IS REGULATIONS, ANY APPLICABLE STATE AND LOCAL REGULATIONS SHOULD BE CONSULTED. THE ABOVE INFORMATION MAY BE BASED IN PART ON INFORMATION PROVIDED BY COMPONENT SUPPLIERS AND IS BELIEVED TO BE CORRECT AS OF THE DATE HEREOF. HOWEVER, NO WARRANTY OF MERCHANTABILITY, FITNESS FOR ANY USE, OR ANY OTHER WARRANTY IS EXPRESSED OR IS TO BE IMPLIED REGARDING THE ACCURACY OF THESE DATA, THE RESULTS TO BE OBTAINED FROM THE USE OF THE MATERIAL, OR THE HAZARDS CONNECTED WITH SUCH USE. SINCE THE INFORMATION CONTAI NED HEREIN MAY BE APPLIED UNDER CONDITIONS BEYOND OUR CONTROL AND WITH WHICH WE MAY BE UNFAMILIAR, AND SINCE DATA MADE AVAILABLE SUBSEQUENT TO THE DATE HEREOF MAY SUGGEST MODIFICATION OF THE INFORMATION, WE ASSUME NO RESPONSIBILITY FOR THE RESULT OF ITS US E. THIS INFORMATION AND MATERIAL IS FURNISHED ON THE CONDITION THAT THE PERSON RECEIVING IT SHALL MAKE HIS/HER OWN DETERMINATION AS TO THE SUITABILITY OF THE MATERIAL FOR HIS/HER PARTICULAR PURPOSE AND ON THE CONDITION THAT HE/SHE ASSUME THE RISK OF HIS/HER USE THEREOF. Revised April 4, 2016

1. 1 of 8 DuraTray II Powder Safety Data Sheet Section 1 - Chemical Product and Company Identification Product Name: DuraTray II Powder Company Identification: Reliance Dental Mfg., LLC. 5805 W. 117 th Place Alsip, IL 60803 For Product Information, call: 708 - 597 - 6694 For Medical Information, call: 800 - 535 - 5053 Section 2 - Hazards Identification EMERGENCY OVERVIEW: WARNING: For Polymer: OSHA classifies this material as Particulates, Not Otherwise Classified. Eyes: May be irritating to the eyes by gross overexposure, no matter how generated. Symptoms of overexposure may include redness, itching, irritation, burning pain and watering. Keep dust out of eyes. Respiratory Tract: May be irritated by gros s overexposure, no matter how generated. Skin: May be irritated by gross overexposure, no matter how generated. May cause dryness. For Calcium Carbonate: Eyes: May cause mild irritation including watering. Ingestion: If the quan tity is large, it may cause intestinal obstruction and/or constipation. Respiratory Tract: Can be irritating, with symptoms including sneezing and nasal irritation. For Synthetic Organic Colorant: Acute Hazards: Eyes: May cause slight irritation. Skin: May cause slight Irritation. Chronic Hazards: Skin: Long term exposure may result in dermatitis for sensitive individuals. Inhalation: Respiratory allergies and diseases may be aggravated by extreme exposures. For Decomposition Products: Methyl Methacrylate Monomer: Acute Hazards: Eyes: May irritate. Respiratory Tract: May irritate. Skin: May cause rashes. Symptoms: Headaches, nausea, staggering gait, confusion, drowsiness and unconsciousn ess. Chronic Hazards: Eyes: May cause eye corrosion and permanent injury. Liver and Kidneys: May cause changes in liver and kidney function or damage. Nervous System: Repeated and prolonged over exposure may cause permanent damage. Skin: May cause allergic skin rashes. For Ethyl Acrylate Monomer: Acute Hazards: Eyes: Causes severe irritation or chemical burns. Permanent damage if not treated promptly. Ingestion: Causes severe gastrointestinal irritation and lethargy. Inhalation: High concentrations of vapors or mists may cause headaches, nausea or severe irritation to the mucous membranes and the respiratory tract. Also causes cyanosis. Possibly fatal in high concentrations. Skin: Can be absorbed through the skin in harmful amounts. Causes severe irritations or chemical burns. Permanent damage if not treated promptly.

7. 7 of 8 DuraTray II Powder Section 14 - Transport Information DOT/UN SHIPPING NAME: SYNTHETIC GUM RESIN GRANULAR, NOIBN DOT/UN CLASS: NA/UN NUMBER: PACKING GROUP: LABEL: NMFC ITEM#: 46030 SCHEDULEB: 3906.90.6000 IMDG CLASS: IMDG PG: CERCLA RQ: For Decomposition Products Methyl Methacrylate Monomer: 1000 lb. Ethyl Acrylate Monomer: 1000 lbs. Section 15 - Regulatory Information ITEM TSCA EINECS CERCLA CAA CWA RCRA SARA 313 MAK 03 X X 04 X X 05 X X X X X U 162 X 50 ppm 06 X X X X X U 113 X 5 PPM ITEM AUSTRALIA CANADA CHINA JAPAN KOREA PHILIPPINE 05 X 06 X ITEM CA65 FL MA MI MN NJ NY PA WA 05 X X X X X X 06 X X X X X X X X TSCA: FOR USE IN FDA REGULATED PRODUCTS ONLY FDA: This Synthetic Organic Colorant is not listed by the FDA for use under 21 CFR since potential applications are so numerous that specific applications must be submitted to the FDA for inclusion in the 21 CFR listing. CANADIAN WHMIS: This product has been classified in accordance with the hazardous criteria of the CPR and the MSDS contains all the information required by the CPR. RISK STATEMENTS: R36/37/38 - Irritating to eyes, respiratory system and skin. R43 - May caus e sensitization by skin contact. SAFETY STATEMENTS: S3 - Keep in a cool place. S7 - Keep container tightly closed. S9 - Keep container in a well ventilated place. S20 - When using do not eat or drink. S37/39 - Wear suitable gloves and eye/face protection. Section 16 - Additional Information HAZARDOUS MATERIAL IDENTIFICATION SYSTEM (HMIS) RATING: HEALTH: 1 FLAMMABILITY: 1 REACTIVITY: 0 PERSONAL PROTECTIVE EQUIPMENT: Gloves and Safety Glasses or Chemical Gogg les.

4. 4 of 8 DuraTray II Powder Section 9 - Physical and Chemical Properties Continued VAPOR PRESSURE: NA PERCENT VOLATILE W/W%: NA VAPOR DENSITY (AIR=1): NA EVAPORATION RATE (BuAc =1): 30 SOLUBILITY IN WATER: Insoluble. COEFFICIENT OF WATER/OIL DISTRIBUTION: ND Section 10 - Stability and Reactivity CONDITIONS TO AVOID: Heating above 240  C, 464  F. INCOMPATIBILITY (MATERIALS TO AVOID): Strong oxidizing agents. HAZARDOUS DECOMPOSITION PRODUCTS: Methacrylate Monomer and Oxides of Carbon when burned. HAZARDOUS POLYMERIZATION: MAY OCCUR: WILL NOT OCCUR: X STABILITY: UNSTABLE: STABLE: X Section 11 - Toxicological Information TARGET ORGANS: For Polymer: None Listed. For Calcium Carb onate: None Listed. For Synthetic Organic Colorant: None Listed. For Decomposition Products: Methyl Methacrylate Monomer: Nose, Liver, Kidneys. Ethyl Acrylate Monomer: Skin, Eyes, Respiratory System. SENSITIVITY DATA: For Ethyl Acrylate Monomer: Skin Rabbit: Corrosive. Eye Rabbit: Corrosive. Eye Rabbit: Irritant. Skin Human: Corrosive. MUTAGENICITY DATA: For Polymer: None Listed. For Decomposition Products: Methyl Methacrylate Monomer: Ovary Hamster Cy togenetic Analysis: 1600 mg/L. Inhalation Rat Cytogenetic Analysis: 4 mg/m 3 /16W. Lymphocyte Mouse Gene Mutation in Mammalian Cells: 704 mg/L. Lymphocyte Mouse Microsomal Assay: 500 mg/L. Ovary, Hamster Sister Chromatid Exchange: 15 00 mg/L. Ethyl Acrylate Monomer: Lung Hamster Cytogenetic Analysis: 9800 μ g/L. Lymphocyte Mouse Cytogenetic Analysis: 20 mg/L. Lymphocyte Mouse Gene Mutation in Mammalian Cells: 20 mg/L. Intraperitoneal Mouse Micronucleus Test: 225 mg/kg. Lymphocyte Mouse Microsomal Assay: 20 mg/L. S. Typhimurium Microsomal Assay: 100 μg/plate.

2. 2 of 8 DuraTray II Powder Section 2 - Hazards Identification Continued Chronic Hazards: Inhalation: Prolonged or repeated exposure can cause drowsiness, headache and nausea. Repeated exposure may cause liver and kidney damage. Skin: May cause skin sensitization to acrylic monomers. CARCINOGENICITY: Ethyl Acrylate is listed as a suspected human carcinogen by IARC, NTP, an d ACGIH based on animal studies. NIOSH lists Ethyl Acrylate as a carcinogen without comment. Calcium Carbonate contains crystalline silica as a minor impurity. Crystalline silica is listed by IARC as a pulmonary carcinogen in hu mans. None of the other components of this material are listed by IARC, NTP, OSHA, or ACGIH as carcinogens. PRIMARY ROUTES OF ENTRY: Inhalation, Skin or Eyes. Section 3 - Composition, Information on Ingredients FOR POLYMER: Item Chemical Name CAS # WT/WT% 01 Particulates Not Otherwise Classified NE 60.0 - 100.0 02 Residual Monomers NA 0.5 - 5..0 03 Calcium Carbonate (CI 77220) 1317 - 65 - 3 30.0 - 60.0 04 Synthetic Organic Colorant NE 0.5 - 1.5 ACGIH OSHA Company ITEM TL V - TWA TLV - STEL PEL TWA PEL CEILING Recommendation SKIN 01 10 mg/m 3 NE 15 mg/m 3 NE NE NE 02 NA NA NA NA NA NA 03 10 mg/m 3 NE 15 mg/m 3 NE 10 mg/m 3 NE 04 NE NE NE NE NE NE FOR DECOMPOSITION PRODUCTS: Item Chemical Name CAS # WT/WT% 05 Methyl Methacrylate Monomer 80 - 62 - 6 40.0 - 70.0 06 Ethyl Acrylate Monomer 140 - 88 - 5 5.0 - 10.0 ACGIH OSHA Company ITEM TLV - TWA TLV - STEL PEL TWA PEL CEILING Recommendation SKIN 05 100 ppm NE 100 ppm NE 100 ppm NE 06 5 ppm skin 25 ppm 25 ppm skin NE 5 ppm skin 5 ppm skin SECTION 4 - FIRST AID RES Section 4 - First Aid Measures EMERGENCY AND FIRST AID PROCEDURES: EYES: Flush with water for 15 minutes, including under eyelids. Get medical help if discomfort persists. INGESTION: Rinse mouth out with water. Call doctor if amount was large. INHALATION: Remove to fresh air. Get medical help if discomfort persis ts. SKIN: Wash with soap and water. Get medical help if discomfort persists. CLOTHING: Remove contaminated clothing, wash thoroughly before reuse. TREATMENT: Treat symptoms conventionally, after thorough decontamination.

6. 6 of 8 DuraTray II Powder Section 11 - Toxicological Information Continued Oral Rat LD 50 : 1120 mg/kg. Oral Rabbit LD 50 : 400 mg/kg. Skin Rat LD Lo : 1800 mg/kg. Skin Rat LD Lo : 3976 mg/kg. Skin Rat LD Lo : >5000 mg/kg. Skin Rabbit LD 50 : 1834 mg/kg. Skin Rabbit LD 50 : 1800 mg/kg. Section 12 - Ecological Information AQUATIC TOXICITY: For Polymer: None Listed. For Decomposition Products: Methyl Methacrylate Monomer: Flathead Minnows TLm 96H : 100 - 1000 ppm. Gold Fish TLm 24H : 420 ppm. Bluegills TLm 24H : 368 ppm. Rainbow Trout TLm 96H : >79 mg/L. Daphnia Magna LC 50 : 69 mg/L. Algae LC 50 : 170 mg/L. Ethyl Acrylate Monomer: Rainbow Trout LC 50 - 96H : 5 mg/L. Daphnia Magna LC 50 - 48H : 8 mg/L. Algae LC 50 - 96H : 5 mg/L. ECOLOGICAL TO XICITY: For Polymer: Not Known. For Synthetic Organic Colorant: No studies have been conducted. ENVIRONMENTAL FATE: For Decomposition Products: Methyl Methacrylate Monomer: 28 Day Biodegradation Study: Ultimately biodegradable (88% within 28 days) under aerobic conditions. Adsorption/Desorption: Very Highly mobile, not absorbed to soil. Hydrolysis: Rapidly hydrolyze at alkaline pH. Soil Metabolism: MMA is rapidly dissipated, t½<1 day. Ethyl Acrylate Monomer: Biodegradable: Readily hydrolyzes under alkaline conditions. OXYGEN DEMAND DATA: For Ethyl Acrylate Monomer: COD: 1.6 g/G. BOD: 0.9 g/G/5D. Section 13 - Disposal Considerations WASTE DISPOSAL METHOD: Dispose in landfill or incinerate according to Federal, State, and Local regulations. DISPOSAL OF EMPTY CONTAINERS: Reuse of empty drums or containers is not recommended. Employees should be advised of the potential hazards due to residual material, associated with empty containers. It is our policy to discourage the reuse of empty containers and to dispose of all empty containers properly in accordance with Federal, State and Local regulations.

3. 3 of 8 DuraTray II Powder Section 5 - Fire Fighting Measures FLASH POINT: 304  C, 580  F FLAMMABLE LIMIT , AIR VOL% LOWER: NA UPPER: NA AUTOIGNITION TEMPERATURE: NE EXTINGUISHER METHOD: Water, carbon dioxide, dry chemical. FIRE AND EXPLOSION HAZARDS: Polymer dust is combustible. The explosive limits of the polymer particles suspended in air are approximately those of coal dust. SPECIAL FIRE FIGHTING PROCEDURES: Avoid extinguishing methods, which may generate dust clouds. Water stream can disperse dust into air produc ing a fire hazard and possible explosion hazard if exposed to ignition source. EXPLOSION HAZARD: Firefighters should wear self - contained breathing apparatus. SENSITIVE TO MECHANICAL IMPACT: No. SENSITIVE TO STATIC DISCHARGE: Yes Section 6 - Accidental Release Measures ACCIDENTAL RELEASE: Isolate hazard area and deny entry to unnecessary or un protected personnel. Sweep up to avoid slipping hazard. Keep airborne particulates at a minimum when cleaning up spill s. E Section 7 - Handling and Storage PRECAUTIONS FOR HANDLING: Use in well ventilated areas. Avoid contact with skin, eyes and clothing. Avoid breathing dust. Use good personal hygiene and housekeeping. PRECAUTIONS FOR STORAGE: Store contai ners in a cool, dry place away from incompatible materials. Keep container closed to prevent water absorption and contamination. INDUSTRIAL HYGIENE PRACTICES: Wash face and hands thoroughly with soap and water after use and before eating, drinking, smoking or applying cosmetics. Section 8 - Exposure Controls, Personal Protection VENTILATION: Use good local exhaust at processing equipment, including buffers, sanders, grinders and polishers. RESPIRATORY PROTECTION: Use type for Particulates Not Otherwise Classified, if needed. EYE PROTECTION: Safety glasses or chemical splash goggles. PROTECTIVE GLOVES: Impervious, nitrile, if hot plastic is handled. OTHER PROTECTIVE EQUIPMENT: Provide eyewash, safety shower and imp ervious clothing are recommended. High temperature processing equipment should be well ventilated INDUSTRIAL HYGIENE PRACTICES: Wash face and hands thoroughly with soap and water after use and before eating, drinking, smoking or ap plying cosmetics. Section 9 - Physical and Chemical Properties APPEARANCE: Fine fluorescent blue or green powder. ODOR: Faint odor in bulk. pH: ND ODOR THRESHOLD: ND BOILING POINT: NA FREEZING POINT: NA VISCOSITY: NA SPECIFIC GRAVITY (H 2 O=1): 1.25

5. 5 of 8 DuraTray II Powder Section 11 - Toxicological Information Continued REPRODUCTIVE TOXICITY DATA: For Polymer: None Listed. For Decomposition Products: Methyl Methacrylate Monomer: Inhalation Rat TC Lo : 109 gm/m 3/ 17M. Inhalation Rat TC Lo : 109 gm/m3/54M, 6 - 15 days of pregnancy . Inhalation Rat TC Lo : 54 mg/m3/24H, 8 weeks of pregnancy . Inhalation Rat TC Lo : 4480 m g/m 3/ 2H ,6 - 18 days of pregnancy. Intraperitoneal Rat TC Lo : 405 mg/kg. Intraperitoneal Rat TC Lo : 801 mg/kg. Ethyl Acrylate Monomer: Inhalation Rat TC Lo : 135 ppm/6H 6 - 15D preg TUMOROGENIC DATA: For Polymer: None Listed . TOXICITY DATA: For Polymer: None Listed. For Synthetic Organic Colorant: Inhalation Rat LC 50: >2.88 mg/L/4H. Oral Rat LD 50: >15.300 mg/kg Skin Rabbit LD 50: >3000 mg/kg. For Decomposition Products: Methyl Methacrylate Monomer: Acute Oral Rat LD 50: 7990 mg/kg. Acute Oral Rat LD 50: >5000 mg/kg. Acute Dermal Rabbit LD 50: 35,500 mg/kg. Acute Dermal Rabbit LD 50: >5000 mg/kg. Acute Inhalation Rat LD 50: >12,500 to 16,500 ppm/0.5H. Inhalation Human TC Lo: 125 ppm. Inhalation Human TC Lo: 60 mg/m 3. Inhalation Rat LD 50: 7094 ppm/4H. Epidemiology Data: In a retrospective study of the effects of exposure to ethyl acryl ate and methyl Methacrylate o n workers in one plant between 1933 and 1945, a higher - than - expected incidence of colorectal cancer mortality was observed. A study on workers hired after 11945 in the same plant, and a study on workers hired after 1942 in a second pl ant, did not show an increased risk of colorectal cancer mortality. Human Patch Test: Approximate one - third of subjects developed mild redness at the site of application. Twenty percent showed sensitivity when tested 10 days later . Ethyl Acrylate Monomer: Inhalation Guinea Ping LC Lo : 1204 ppm/7H. Inhalation Human TC Lo : 50 ppm. Inhalation Mouse LC Lo : 25 mg/m3/2H. Inhalation Rat LC 50 : 21870 ppm/4H. Inhalation Rat LC 50 : 2000 ppm/4H. Inhalation Rabbit LC Lo : 1204 ppm/7H. Intraperitoneal Mouse LD 50 : 599 mg/kg. Intraperitoneal Rat LD 50 : 4550 mg/kg. Oral Mouse LD 50 : 1779 mg/kg. Oral Rat LD 50 : 800 mg/kg.

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