PHTHALIC ANHYDRIDE†
Chemical Identification | |
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CAS # | 85-44-9 |
Formula |
C₈H₄O₃ |
Synonyms |
1,2-benzenedicarboxylic anhydride; 1,3, dioxophthalan; 1,3 isobenzoflurandione; PAN; phthalic acid anhydride |
Physical Properties | |||
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Physical description | A colorless to white lustrous solid in the form of needles with a mild distinctive odor. | ||
Boiling point | 563°F | Molecular weight | 148.12 |
Freezing point/melting point | 267.4°F | Vapor pressure | 0.0015 mmHg |
Flash point | 305°F | Vapor density | 5.1 |
Specific gravity | 1.53 at 68°F | Ionization potential | 10.00 eV |
Lower explosive limit (LEL) | 1.7% | Upper explosive limit (UEL) | 10.5% |
NFPA health rating | 2 | NFPA fire rating | 1 |
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.) | 2110 | |||||
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 |
2 ppm (12 mg/m³) |
REL-TWA |
1 ppm (6 mg/m³) |
TLV-TWA |
0.002 mg/m³ (inhalable fraction and vapor) [2016] |
PEL-TWA |
1 ppm (6 mg/m³) |
PEL-STEL |
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REL-STEL |
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TLV-STEL |
0.005 mg/m³ (inhalable fraction and vapor) [2016] |
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 |
N |
Notes: |
Notes:
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Notes:
dermal sensitizer (DSEN), respiratory sensitizer (RSEN) |
Notes:
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Health factors: See NIH-NLM PubChem. | IDLH |
60 mg/m³ |
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Carcinogenic classifications: TLV-A4 |
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 anhydride NIOSH: Pocket Guide to Chemical Hazards - Phthalic anhydride Literature References
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Last Updated Date : 01/29/2021