Naphthalene
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CAS
91-20-3
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C10H8
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RTECS
QJ0525000
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Synonyms & Trade Names
Naphthalin, Tar camphor, White tar
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DOT ID & Guide
1334 / 133 (crude or refined)
2304 / 133 (molten)
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Exposure
Limits
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NIOSH REL: TWA 10 ppm (50 mg/m3) ST 15 ppm (75 mg/m3)
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OSHA PEL†: TWA 10 ppm (50 mg/m3)
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IDLH
250 ppm
See: 91203
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Conversion
1 ppm = 5.24 mg/m3
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Physical Description
Colorless to brown solid with an odor of mothballs. [Note: Shipped as a molten solid.]
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MW: 128.2
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BP: 424°F
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MLT: 176°F
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Sol: 0.003%
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VP: 0.08 mmHg
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IP: 8.12 eV
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Sp.Gr: 1.15
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Fl.P: 174°F
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UEL: 5.9%
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LEL: 0.9%
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Combustible Solid, but will take some effort to ignite.
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Incompatibilities & Reactivities
Strong oxidizers, chromic anhydride
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Measurement Methods
NIOSH 1501; OSHA 35
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Molten flush immediately/solid-liquid soap wash promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
NIOSH/OSHA
Up to 100 ppm:
(APF = 10) Any air-purifying half-mask respirator with organic vapor cartridge(s) in combination with an N95, R95, or P95 filter. The following filters may also be used: N99, R99, P99, N100, R100, P100. Click here for information on selection of N, R, or P filters.*
(APF = 10) Any supplied-air respirator*
Up to 250 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode*
(APF = 50) Any air-purifying full-facepiece respirator equipped with organic vapor cartridge(s) in combination with an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters.
(APF = 25) Any powered air-purifying respirator with an organic vapor cartridge in combination with a high-efficiency particulate filter.*
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece
Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters./Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
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Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
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Symptoms
Irritation eyes; headache, confusion, excitement, malaise (vague feeling of discomfort); nausea, vomiting, abdominal pain; irritation bladder; profuse sweating; jaundice; hematuria (blood in the urine), renal shutdown; dermatitis, optical neuritis, corneal damage
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Target Organs
Eyes, skin, blood, liver, kidneys, central nervous system
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See also: INTRODUCTION See ICSC CARD: 0667
See MEDICAL TESTS: 0152
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