Pyromellitic acid Chemical Properties

Melting point:

281-284.5 °C(lit.)

Boiling point:

317.36°C (rough estimate)

Density 

0,56 g/cm³

refractive index 

1.7010 (estimate)

Flash point:

325 °C

storage temp. 

Store below +30°C.

solubility 

0.1 M NaOH: 0.2 M, clear, faintly yellow

form 

Crystalline Powder

pka

pK1: 1.92;pK2: 2.87;pK3: 4.49;pK4: 5.63 (25°C)

color 

White to very slightly yellow

Water Solubility 

1.5 g/100 mL (20 ºC)

Merck 

14,8004

Stability:

Stable. Incompatible with strong oxidizing agents, strong bases.

InChIKey

CYIDZMCFTVVTJO-UHFFFAOYSA-N

LogP

0.15 at 25℃

CAS DataBase Reference

89-05-4(CAS DataBase Reference)

NIST Chemistry Reference

1,2,4,5-Benzene-tetracarboxylic acid(89-05-4)

EPA Substance Registry System

1,2,4,5-Benzenetetracarboxylic acid (89-05-4)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38-36

Safety Statements 

26-36-37/39-24/25

WGK Germany 

3

RTECS 

DB9275000

F 

34

TSCA 

Yes

HS Code 

29173980

MSDS

• Language:English Provider:1,2,4,5-Benzenetetracarboxylic acid
• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Pyromellitic acid Usage And Synthesis

Chemical Properties

White powder. Absorbs moisture slowly if exposed to atmosphere. Soluble in alcohol, slightly soluble in water.

Uses

Pyromellitic acid is an eluent used in anion chromatography and forms complexes with magnesium and calcium ions. It is used as a curing agent, as an intermediate for powder coating and a cross-linking agent for alkyd resin. It is involved in the synthesis of polyimide and pyromellitic octyl.

Uses

Pyromellitic acid (PMA) is mainly used as intermediate for powder coating. Product Data Sheet

Uses

1,2,4,5-benzenetetracarboxylic acid is used for the synthesis of the polyimide, pyromellitic octyl, etc., it is the main raw material of matting curing agent.

Definition

ChEBI: A tetracarboxylic acid that is benzene substituted by four carboxy groups at positions 1, 2, 4 and 5 respectively.

Hazard

Skin irritant, may be carcinogenic.

Purification Methods

Dissolve it in 5.7 parts of hot dimethylformamide, decolorise, filter and cool. The precipitate is collected and dried in air. The solvent is removed by heating in an oven at 150-170o for several hours. It also crystallises from water. [Beilstein 9 H 997, 9 IV 3804.]

Pyromellitic acid(89-05-4)Related Product Information

• Tetrachlorophthalic acid
• Isophthalic acid
• Phthalic acid
• Benzene
• Glycine
• Folic acid
• Ethylbenzene
• Citric acid
• Benzyl benzoate
• Bis(2-ethylhexyl) phthalate
• Ethyl 2-(Chlorosulfonyl)acetate
• Potassium hydrogen phthalate
• Allylbenzene
• Benzoic acid
• 1,4,5,8-Naphthalenetetracarboxylic acid
• Trimesic acid
• 1,3,5-Benzenetricarboxaldehyde
• Ascoric Acid