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Phthalic anhydride Structure

Phthalic anhydride

Chemical Properties

Melting point 131-134 °C(lit.)
Boiling point 284 °C(lit.)
Density  1,53 g/cm3
vapor density  5.1 (vs air)
vapor pressure  <0.01 mm Hg ( 20 °C)
refractive index  1.4500 (estimate)
Flash point 152 °C
storage temp.  Store below +30°C.
solubility  6g/l (slow decomposition)
form  Flaky Crystals
pka 2.97[at 20 ℃]
color  White
Odor Characteristic choking odor
PH Range 2 at 6 g/l at 20 °C
PH 2 (6g/l, H2O, 20℃)
explosive limit 1.7-10.5%(V)
Water Solubility  6 g/L (20 ºC)
Sensitive  Moisture Sensitive
Merck  14,7372
BRN  118515
Henry's Law Constant 6.29 at 20 °C (approximate - calculated from water solubility and vapor pressure)
Exposure limits NIOSH REL: TWA 6 mg/m3 (1 ppm), IDLH 60 mg/m3; OSHA PEL: TWA 12 mg/m3 (2 ppm); ACGIH TLV: TWA 1 ppm (adopted).
Stability Stable. Combustible. Incompatible with strong oxidizing agents, strong bases, moisture, strong acids. Dust may form an explosive mixture with air.
LogP 2.07 at 20℃
Indirect Additives used in Food Contact Substances PHTHALIC ANHYDRIDE
FDA 21 CFR 175.105; 177.1460; 177.2600
CAS DataBase Reference 85-44-9(CAS DataBase Reference)
EWG's Food Scores 3-5
FDA UNII UVL263I5BJ
NIST Chemistry Reference Phthalic anhydride(85-44-9)
EPA Substance Registry System Phthalic anhydride (85-44-9)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H302-H315-H317-H318-H334-H335
Precautionary statements P280-P301+P312+P330-P302+P352-P305+P351+P338+P310
Hazard Codes  Xn
Risk Statements  22-37/38-41-42/43
Safety Statements  23-24/25-26-37/39-46-22
RIDADR  2214
WGK Germany  1
RTECS  TI3150000
10-21
Autoignition Temperature 580 °C
TSCA  Yes
HazardClass  8
PackingGroup  III
HS Code  29173500
Hazardous Substances Data 85-44-9(Hazardous Substances Data)
Toxicity LD50 orally in Rabbit: 1530 mg/kg LD50 dermal Rabbit > 3160 mg/kg
IDLA 60 mg/m3
NFPA 704:
1
3 0

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