Trimellitic Acid Anhydride

Chemical Properties

Melting point	163-166 °C (lit.)
Boiling point	390 °C
Density	1.54
vapor density	6.6 (vs air)
vapor pressure	<0.01 mm Hg ( 20 °C)
refractive index	1.4717 (estimate)
Flash point	227 °C
storage temp.	Store below +30°C.
solubility	24.4g/l (decomposition)
pka	3.11±0.20(Predicted)
form	Flakes
color	White to off-white
PH	2 (21g/l, H2O, 20℃)
explosive limit	1-7%(V)
Water Solubility	DECOMPOSES
Sensitive	Moisture Sensitive
Merck	14,9703
BRN	9394
Exposure limits	ACGIH: TWA 0.0005 mg/m3; STEL 0.002 mg/m3 (Skin) NIOSH: TWA 0.005 ppm(0.04 mg/m3)
Stability	Stable. Moisture sensitive.
InChIKey	SRPWOOOHEPICQU-UHFFFAOYSA-N
LogP	0.06-0.54 at 20℃
CAS DataBase Reference	552-30-7(CAS DataBase Reference)
NIST Chemistry Reference	Trimellitic anhydride(552-30-7)
EPA Substance Registry System	Trimellitic anhydride (552-30-7)

Hazard Codes	Xn
Risk Statements	37-41-42/43
Safety Statements	22-26-36/37/39
OEB	D
OEL	TWA: 0.005 ppm (0.04 mg/m3) Should be handled in the workplace as an extremely toxic substance.
WGK Germany	1
RTECS	DC2050000
F	10-21
TSCA	Yes
HS Code	29173980
Hazardous Substances Data	552-30-7(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: > 2730 mg/kg LD50 dermal Rabbit 23000 mg/kg