Molecule structure of Tetrafluoroisophthalic acid (CAS NO.1551-39-9):

IUPAC Name: 2,4,5,6-Tetrafluorobenzene-1,3-dicarboxylic acid 
Molecular Weight: 238.092693 [g/mol]
Molecular Formula: C₈H₂F₄O₄ 
Index of Refraction: 1.522
Molar Refractivity: 40.08 cm³
Molar Volume: 131.3 cm³
Surface Tension: 56.4 dyne/cm
Density: 1.812 g/cm³ 
Melting Point: 212-214 °C(lit.)
Flash Point: 166.6 °C
Enthalpy of Vaporization: 62.95 kJ/mol
Boiling Point: 351.8 °C at 760 mmHg
Vapour Pressure: 1.48E-05 mmHg at 25 °C
XLogP3-AA: 1.4
H-Bond Donor: 2
H-Bond Acceptor: 8
Rotatable Bond Count: 2
Exact Mass: 237.988921
MonoIsotopic Mass: 237.988921
Topological Polar Surface Area: 74.6
Heavy Atom Count: 16
Canonical SMILES: C1(=C(C(=C(C(=C1F)F)F)C(=O)O)F)C(=O)O
InChI: InChI=1S/C8H2F4O4/c9-3-1(7(13)14)4(10)6(12)5(11)2(3)8(15)16/h(H,13,14)(H,15,16)
InChIKey: PGRIMKUYGUHAKH-UHFFFAOYSA-N
Product Categories: Carboxylic Acid Monomers; Monomers; Polymer Science

Hazard Codes: Xi
Risk Statements: 36/37/38 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-37/39 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S37/39:Wear suitable gloves and eye/face protection.
RIDADR: 2811
WGK Germany: 3
Hazard Note: Irritant
HazardClass: 6.1(b)
PackingGroup: III

 Tetrafluoroisophthalic acid (CAS NO.1551-39-9) is also named as 1,3-Benzenedicarboxylic acid, 2,4,5,6-tetrafluoro- ; 2,4,5,6-Tetrafluorobenzene-1,3-dicarboxylic acid ; 2,4,5,6-Tetrafluoroisophthalic acid . Tetrafluoroisophthalic acid (CAS NO.1551-39-9) is white crystalline powder.