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R7E•i/hIY3�] <br />Centers for Dlseose <br />Control and Prevention <br />CDC- NIOSH Pocket Guide to Chemical Hazards -Naphthalene <br />The National Institute for Occupational Safety and Health <br />(NIOSH) <br />Synonyms &Trade Names <br />Naphthalin, Tar camphor, White tar <br />CAS No. RTECS No. <br />91-20-3 Q]0525000 <br />Formula Conversion <br />C,nHa 1 ppm = 5.24 mg/m3 <br />Exposure Limits <br />NIOSH REL <br />TWA 10 ppm (50 mg/m3) ST 15 ppm (75 mg/m3) <br />OSHA PEL <br />TWA 10 ppm (50 mg/m3) See Appendix G <br />Physical Description <br />Promoling productive workplaces /©�' <br />through safety and health research <br />DOT ID &Guide <br />1334 133(crude or refined) <br />2304 133(molten) <br />IDLH <br />250 ppm <br />See: 91203 <br />Measurement Methods <br />NIOSH 1501; <br />OSHA 35 <br />See: NMAM or OSHA Methods <br />Colorless to brown solid with an odor of mothballs. [Note: Shipped as a molten solid.] <br />Molecular <br />Weight <br />128.2 <br />Boiling Point <br />424°F <br />Melting Point <br />176°F <br />Specific Flash Point Upper <br />Gravity Explosive Limit <br />174°F <br />1.15 5.9% <br />Combustible Solid, but will take some effort to ignite. <br />Incompatibilities & Reactivities <br />Strong oxidizers, chromic anhydride <br />Solubility <br />0.003% <br />Lower <br />Explosive Limit <br />0.9% <br />Vapor Ionization <br />Pressure Potential <br />0.08 mmHg 8.12 eV <br />haps:INnvw.cdc.gov/niosh/npg/npgd0439.h1m1 �/3 <br />