Pyromellitic acid

Synonym(s):1,2,4,5-Benzenetetracarboxylic acid;Benzene-1,2,4,5-tetracarboxylic acid;Pyromellitic acid

CAS NO.：89-05-4
Empirical Formula: C10H6O8
Molecular Weight: 254.15
MDL number: MFCD00002471
EINECS: 201-879-5
SAFETY DATA SHEET (SDS)
Update Date: 2025-01-27 09:38:02

What is Pyromellitic acid?

Chemical properties

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

The Uses of Pyromellitic acid

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

The Uses of Pyromellitic acid

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.

The Uses of Pyromellitic acid

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.

What are the applications of Application

Pyromellitic acid is an eluent for anion chromatography

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.]

Properties of Pyromellitic acid

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.
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 for Pyromellitic acid

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H319:Serious eye damage/eye irritation
Precautionary Statement Codes	P280:Wear protective gloves/protective clothing/eye protection/face protection. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P337+P313:IF eye irritation persists: Get medical advice/attention.