SDS US 2MY Version #: 01 Issue Date: 04-30-2020 1 / 8 Supplemental Information None

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SDS US 2MY Version #: 01 Issue Date: 04-30-2020 1 / 8 Supplemental Information None SAFETY DATA SHEET 1. Identification Product identifier Naphthalene Other means of identification SDS number 2MY Materion Code 2MY CAS number 91-20-3 Manufacturer/Importer/Supplier/Distributor information Manufacturer Company name Materion Advanced Chemicals Inc. Address 407 N 13th Street 1316 W. St. Paul Avenue Milwaukee, WI 53233 United States Telephone 414.212.0257 E-mail advancedmaterials@materion.com Contact person Laura Hamilton Emergency phone number Chemtrec 800.424.9300 2. Hazard(s) identification Physical hazards Flammable solids Category 1 Health hazards Acute toxicity, oral Category 4 Serious eye damage/eye irritation Category 2B Carcinogenicity Category 2 Environmental hazards Not classified. OSHA defined hazards Combustible dust Label elements Signal word Danger Hazard statement Flammable solid. Harmful if swallowed. Suspected of causing cancer. Very toxic to aquatic life with long lasting effects. Precautionary statement Prevention Do not handle until all safety precautions have been read and understood. Wear protective gloves/protective clothing/eye protection/face protection. Keep away from heat/sparks/hot surfaces. - No smoking. Ground and bond container and receiving equipment. Use explosion-proof electrical/ventilating/lighting/ equipment. Wash hands thoroughly after handling. When using, do not eat, drink or smoke. Response IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell. Rinse mouth. If exposed or if you feel unwell: Get medical advice/attention. Storage Store locked up. Disposal Dispose of contents/container in accordance with local/regional/national/international regulations. Hazard(s) not otherwise None known. classified (HNOC) Material name: Naphthalene SDS US 2MY Version #: 01 Issue date: 04-30-2020 1 / 8 Supplemental information None. 3. Composition/information on ingredients Substances Chemical name Common name and synonyms CAS number % Naphthalene 91-20-3 100 4. First-aid measures Inhalation Move into fresh air and keep at rest. For breathing difficulties, oxygen may be necessary. If breathing has stopped, perform artificial respiration and obtain medical help. Get medical attention. Skin contact Immediately remove contaminated clothing and shoes and wash skin with soap and plenty of water. Get medical attention if irritation persists after washing. Eye contact Flush thoroughly with water for at least 15 minutes. Get medical assistance. Ingestion DO NOT induce vomiting. Get medical attention immediately. Never give anything by mouth to an unconscious person. Most important Causes eye irritation. Mild skin irritation. Prolonged exposure may cause chronic effects. symptoms/effects, acute and delayed Indication of immediate medical Treat symptomatically. attention and special treatment needed General information If you feel unwell, seek medical advice (show the label where possible). 5. Fire-fighting measures Suitable extinguishing media Water spray, foam, dry powder or carbon dioxide. Unsuitable extinguishing media Not available. Specific hazards arising from Flammable or explosive mixtures with air maybe formed. the chemical Special protective equipment Self-contained breathing apparatus and full protective clothing must be worn in case of fire. and precautions for firefighters General fire hazards Flammable solid. 6. Accidental release measures Personal precautions, protective Keep people away from and upwind of spill/leak. Ensure adequate ventilation. Wear necessary equipment and emergency protective equipment. Avoid contact with eyes and prolonged skin contact. Avoid inhalation of dust procedures and vapors. Keep combustibles away from spilled material. Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. Use only non-sparking tools. Pay attention to flashback. Methods and materials for Stop leak if you can do so without risk. Cover powdered spills with plastic sheet or tarpaulin to containment and cleaning up minimize spreading and protect from water. Sweep up or vacuum up spillage and collect in suitable container for disposal. Clean surface thoroughly to remove residual contamination. Environmental precautions Prevent entry into drains. Prevent entry into waterways, sewer, basements or confined areas. 7. Handling and storage Precautions for safe handling Wear protective gloves/protective clothing/eye protection/face protection. Avoid contact with eyes, skin, and clothing. Do not smoke, use open fire or other sources of ignition. Good personal hygiene is necessary. Wash hands and contaminated areas with water and soap before leaving the work site. Conditions for safe storage, Flammable/combustible - Keep away from oxidizers, heat and flames. Keep container tightly including any incompatibilities closed in a cool, well-ventilated place. Material name: Naphthalene SDS US 2MY Version #: 01 Issue date: 04-30-2020 2 / 8 8. Exposure controls/personal protection Occupational exposure limits US. OSHA Table Z-1 Limits for Air Contaminants (29 CFR 1910.1000) Material Type Value Naphthalene (CAS 91-20-3) PEL 50 mg/m3 10 ppm US. ACGIH Threshold Limit Values Material Type Value Naphthalene (CAS 91-20-3) TWA 10 ppm US. NIOSH: Pocket Guide to Chemical Hazards Material Type Value Naphthalene (CAS 91-20-3) STEL 75 mg/m3 15 ppm TWA 50 mg/m3 10 ppm US. California Code of Regulations, Title 8, Section 5155. Airborne Contaminants Material Type Value Naphthalene (CAS 91-20-3) PEL 0.5 mg/m3 0.1 ppm Biological limit values No biological exposure limits noted for the ingredient(s). Exposure guidelines US - California OELs: Skin designation Naphthalene (CAS 91-20-3) Can be absorbed through the skin. US ACGIH Threshold Limit Values: Skin designation Naphthalene (CAS 91-20-3) Can be absorbed through the skin. Appropriate engineering controls Use process enclosures, local exhaust ventilation, or other engineering controls to control airborne levels below recommended exposure limits. If material is ground, cut, or used in any operation which may generate dusts, use appropriate local exhaust ventilation to keep exposures below the recommended exposure limits. Individual protection measures, such as personal protective equipment Eye/face protection Wear safety glasses with side shields (or goggles). Skin protection Hand protection Use protective gloves. Other Apron and long sleeves are recommended. Respiratory protection If ventilation is insufficient, suitable respiratory protection must be provided. Thermal hazards Not available. 9. Physical and chemical properties Appearance Crystalline. Physical state Solid. Form Not available. Color White. Odor Aromatic. Odor threshold Not available. pH Not available. Melting point/freezing point 176.36 °F (80.2 °C) Material name: Naphthalene SDS US 2MY Version #: 01 Issue date: 04-30-2020 3 / 8 Initial boiling point and boiling 424.22 °F (217.9 °C) 101.325 kPa range Flash point 174.0 °F (78.9 °C) Closed Cup 174.2 °F (79.0 °C) Closed Cup Evaporation rate Not available. Flammability (solid, gas) Not available. Upper/lower flammability or explosive limits Flammability limit - lower 0.9 % (%) Flammability limit - upper 5.9 % (%) Explosive limit - lower (%) Not available. Explosive limit - upper (%) Not available. Vapor pressure 0.01 kPa (77 °F (25 °C)) Vapor density 4.42 Relative density Not available. Solubility(ies) Solubility (water) 0.03 g/l Partition coefficient 3.3 (n-octanol/water) Auto-ignition temperature 978.8 °F (526 °C) Decomposition temperature Not available. Viscosity Not available. Other information Density 1.16 g/cm3 at 20 °C Dynamic viscosity 0.96 mPa.s (176.54 °F (80.3 °C)) Kinematic viscosity 0.8262 mm²/s estimated Molecular formula C10-H8 Molecular weight 128.17 g/mol Specific gravity 1.16 Surface tension 31.8 mN/m (212 °F (100 °C)) 10. Stability and reactivity Reactivity This product may react with oxidizing agents. Chemical stability Not available. Possibility of hazardous Not available. reactions Conditions to avoid Heat, sparks, flames. Incompatible materials Oxidizing materials. Chromic acid. Hazardous decomposition Carbon oxides. products 11. Toxicological information Information on likely routes of exposure Inhalation Not available. Skin contact Not available. Eye contact Not available. Ingestion Not available. Material name: Naphthalene SDS US 2MY Version #: 01 Issue date: 04-30-2020 4 / 8 Symptoms related to the Not available. physical, chemical and toxicological characteristics Information on toxicological effects Acute toxicity Product Species Test Results Naphthalene (CAS 91-20-3) Acute Dermal LD50 Rabbit > 2 g/kg Skin corrosion/irritation Not available. Serious eye damage/eye Causes eye irritation. irritation Respiratory or skin sensitization Respiratory sensitization Not available. Skin sensitization Causes skin irritation. Germ cell mutagenicity Not available. Carcinogenicity Suspected of causing cancer. IARC Monographs. Overall Evaluation of Carcinogenicity Naphthalene (CAS 91-20-3) 2B Possibly carcinogenic to humans. OSHA Specifically Regulated Substances (29 CFR 1910.1001-1052) Not regulated. US. National Toxicology Program (NTP) Report on Carcinogens Naphthalene (CAS 91-20-3) Reasonably Anticipated to be a Human Carcinogen. Reproductive toxicity Not available. Specific target organ toxicity - Not available. single exposure Specific target organ toxicity - Not available. repeated exposure Aspiration hazard Not available. 12. Ecological information Ecotoxicity
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