Safety data for phthalic anhydride
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Toxicity data
Risk phrases
Safety phrases
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This information was last updated on February 15, 2006.
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for it. General
Synonyms: 1,2-benzenedicarboxylic acid anhydride, phthalic acid anhydride,
1,3-dioxophthalan, 1,3-dihydro-1,3-dioxoisobenzofuran, 1,3-isobenzofurandione,
phthalandione, retarder AK, retarder esen
Use: Widely used synthetic agent, protecting agent, dehydrating agent
Molecular formula: C8H4O3
CAS No: 85-44-9
EINECS No:
Physical data
Appearance: white crystalline solid with choking odour
Melting point: 131 C
Boiling point: ca. 295 C (sublimes)
Vapour density: 5.1 (air = 1)
Vapour pressure:
Density (g cm-3): 1.53
Flash point: 152 C (closed cup)
Explosion limits: 1.7 - 10.5%
Autoignition temperature:
Water solubility: decomposes
Stability
Stable. Combustible. Incompatible with strong oxidizing
agents, strong bases, moisture, strong acids.
Dust may form an explosive mixture with air.
Toxicology
Corrosive - causes burns. Harmful if swallowed or inhaled.
Skin or eye contact may cause severe irritation. Readily absorbed
through the skin.
Typical TLV/TWA 1 ppm. Typical STEL 4 ppm. Typical PEL 2 ppm.
(The meaning of any abbreviations which appear in this section
is given
here.)
ORL-RAT LD50 4020 mg kg-1
ORL-GPG LD50 100 mg kg-1
ORL-MUS LD50 1500 mg kg-1
ORL-CAT LD50 800 mg kg-1
(The meaning of any risk phrases which appear in this section is
given here.)
R20 R22 R34 R36 R38.
Transport information
(The meaning of any UN hazard codes which appear in this section
is given here.)
UN No 2214. Hazard class 8. Packing group III.
Personal protection
Safety glasses, gloves, adequate ventilation.
(The meaning of any safety phrases which appear in this section
is given here.)