PHTHALIC ACID
Chemical Identification | |
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CAS # | 88-99-3 |
Formula |
C₈H₆O₄ |
Synonyms |
benzene-1,2-dicarboxylic acid; 1,2-benzenecarboxylic acid; o-phthalic acid; o-dicarboxybenzene |
Physical Properties | |||
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Physical description | White crystals or a fine white powder. | ||
Boiling point | decomposes | Molecular weight | 166.13 |
Freezing point/melting point | 410-412°F | Vapor pressure | |
Flash point | 334°F | Vapor density | |
Specific gravity | 1.593 | Ionization potential | |
Lower explosive limit (LEL) | Upper explosive limit (UEL) | ||
NFPA health rating | NFPA fire rating | ||
NFPA reactivity rating | 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.) | P198 | |||||
Sampling group | ||||||
Sampler/Sampling media | GFFs coated with veratrylamine (3,4-dimethoxybenzylamine) and di-n-octyl phthalate [SLTC100] | |||||
Sampling time* | 75 min |
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Sampling volume (TWA)* | 75 L |
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Sampling flow rate (TWA)* | 1 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 | HPLC | |||||
Method reference | OSHA 90 (fully validated) | |||||
Notes | Store filters under refrigeration and use within 1 month. Small interfering peaks start appearing after that time. |
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Special requirements | These media are prepared by SLTC as needed and are not available for immediate shipment. Please allow time for SLTC to prepare these media prior to sampling. |
* 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 |
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REL-TWA |
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TLV-TWA |
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PEL-TWA |
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PEL-STEL |
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REL-STEL |
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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 |
NA |
Skin notation |
NA |
Skin notation |
NA |
Skin notation |
NA |
Notes:
Not established |
Notes:
Not established |
Notes:
Not established |
Notes:
Not established |
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Health factors: See NIH-NLM PubChem. | IDLH | ||||||
Carcinogenic classifications: |
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 - Phthalic acid NIOSH: Pocket Guide to Chemical Hazards - Phthalic acid Literature References
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Last Updated Date : 01/08/2021