Trimellitic Anhydride, TMA CAS#552-30-7

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)

Fp 

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.

InChI

1S/C9H4O5/c10-7(11)4-1-2-5-6(3-4)9(13)14-8(5)12/h1-3H,(H,10,11)

InChIKey

SRPWOOOHEPICQU-UHFFFAOYSA-N

SMILES

OC(=O)c1ccc2C(=O)OC(=O)c2c1

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)

Safety Information

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 

TSCA listed

HS Code 

29173980

Storage Class

11 - Combustible Solids

Hazard Classifications

Eye Dam. 1
Resp. Sens. 1
Skin Sens. 1
STOT SE 3

Hazardous Substances Data

552-30-7(Hazardous Substances Data)

Toxicity

LD50 orally in Rabbit: > 2730 mg/kg LD50 dermal Rabbit 23000 mg/kg