NAPHTHALENE†
Chemical Identification | |
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CAS # | 91-20-3 |
Formula |
C₁₀H₈ |
Synonyms |
diesel exhaust component; white tar; naphthalin; tar camphor |
Physical Properties | |||
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Physical description | A white crystalline volatile solid with a strong coal-tar odor. | ||
Boiling point | 424°F | Molecular weight | 128.2 |
Freezing point/melting point | 176°F | Vapor pressure | 0.08 mmHg |
Flash point | 174°F | Vapor density | 4.42 |
Specific gravity | 1.15 | Ionization potential | 8.12 eV |
Lower explosive limit (LEL) | 0.9% | Upper explosive limit (UEL) | 5.9% |
NFPA health rating | 2 | NFPA fire rating | 2 |
NFPA reactivity rating | 0 | NFPA special instruction | |
Vapor hazard ratio (VHR) | |||
Historical exceedance percentage | |||
Target organs |
Monitoring Methods Used by OSHA | ||||||
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Analyte code (IMIS no.) | 1810 | |||||
Sampling group | ||||||
Sampler/Sampling media | Chromosorb® 106 (100/50 mg) [SKC 226-110] | |||||
Sampling time* | 50 min |
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Sampling volume (TWA)* | 10 L |
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Sampling flow rate (TWA)* | 0.2 L/min |
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Sampling volume (STEL/Peak/C)* |
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Sampling flow rate (STEL/Peak/C)* |
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Analytical method instruments | GC-FID | |||||
Method reference | OSHA 35 (fully validated) | |||||
Notes | Submit as a separate sample. |
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Special requirements |
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* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.
Wipe Method | |
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Sampler/Sampling media |
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Bulk Method |
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On-Site Screening Techniques | ||||||
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Device | ||||||
Model/Type | ||||||
Sampling information (see manufacturer instructions) |
Exposure Limits | |||||||
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OSHA PEL
8-hour TWA (ST) STEL (C) Ceiling Peak |
NIOSH REL
Up to 10-hour TWA (ST) STEL (C) Ceiling |
ACGIH TLV©
8-hour TWA (ST) STEL (C) Ceiling |
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PEL-TWA |
10 ppm (50 mg/m³) |
REL-TWA |
10 ppm (50 mg/m³) |
TLV-TWA |
10 ppm (52 mg/m³) [2013] |
PEL-TWA |
0.1 ppm (0.5 mg/m³) |
PEL-STEL |
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REL-STEL |
15 ppm (75 mg/m³) |
TLV-STEL |
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PEL-STEL |
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PEL-C |
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REL-C |
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TLV-C |
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PEL-C |
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Skin notation |
N |
Skin notation |
N |
Skin notation |
Y |
Skin notation |
Y |
Notes: |
Notes:
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Notes:
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Notes:
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Health factors: See NIH-NLM PubChem. | IDLH |
250 ppm |
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Carcinogenic classifications: TLV-A4, EPA-CBD;C, IARC-2B, NTP-R |
Notes:
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AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
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Additional Resources and Literature References |
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NOAA: CAMEO Chemicals - Naphthalene NIOSH: Pocket Guide to Chemical Hazards - Naphthalene Literature References
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Last Updated Date : 01/05/2021