| Identification | More | [Name]
1,2,4,5-Benzenetetracarboxylic acid | [CAS]
89-05-4 | [Synonyms]
1,2,4,5-BENZENETETRACARBOXYLIC ACID
1,2,4,5-TETRACARBOXYBENZENE
AKOS AUF2102
BENZENE-1,2,4,5-TETRACARBOXYLIC ACID
BENZENE-1,2,4,5-TETRACARBOXYLIC ACID HYDRATE
BUFFER SOLUTION, PH 7.7
PMA
PYROMELLITIC ACID
PYROMELLITIC ACID HYDRATE
RARECHEM AL BO 0488
USAF xr-20
usafxr-20
PYROMELLITIC ACID FOR FLUORESCENCE
1,2,4,5-BENZENETETRACARBOXYLIC ACID 96%
PYROMELLITICACID,DRYCAKE
PYROMELLITIC ACID (1,2,4,5-BENZENETETRACARBOXYLIC ACID)
Buffer solution HPCE pH 7.7
Pyromellitic acid electrolyte buffer for anion HPCE, Sodium pyromellitate buffer solution | [EINECS(EC#)]
201-879-5 | [Molecular Formula]
C10H6O8 | [MDL Number]
MFCD00002471 | [Molecular Weight]
254.15 | [MOL File]
89-05-4.mol |
| Chemical Properties | Back Directory | [Appearance]
White powder | [Melting point ]
281-284.5 °C(lit.)
| [Boiling point ]
317.36°C (rough estimate) | [density ]
0,56 g/cm3 | [refractive index ]
1.7010 (estimate) | [Fp ]
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 | [Stability:]
Stable. Incompatible with strong oxidizing agents, strong bases. | [Water Solubility ]
1.5 g/100 mL (20 ºC) | [Usage]
Pyromellitic acid (PMA) is mainly used as intermediate for powder coating. Product Data Sheet | [Merck ]
14,8004 | [InChIKey]
CYIDZMCFTVVTJO-UHFFFAOYSA-N | [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]
89-05-4(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing .
S37/39:Wear suitable gloves and eye/face protection .
S24/25:Avoid contact with skin and eyes . | [WGK Germany ]
3
| [RTECS ]
DB9275000
| [F ]
34 | [TSCA ]
Yes | [HS Code ]
29173980 |
| Raw materials And Preparation Products | Back Directory | [Raw materials]
1,2,4-Trimethylbenzene-->1,2,4,5-Tetramethylbenzene-->5-Methyl-1,2,4-benzenetricarboxylic acid-->1,2,3,4,5,6,7,8-OCTAHYDROANTHRACENE-->2,4,5-TRIMETHYLBENZALDEHYDE-->2,5-BIS(CHLOROMETHYL)-P-XYLENE-->1,2-Benzenedicarboxylic acid, 4,5-dimethyl--->2,5-DIMETHYLTEREPHTHALIC ACID-->2,4,5-Trimethylbenzoic acid-->1,2,4-Benzenetricarboxylic acid-->Pyromellitic Dianhydride | [Preparation Products]
photosensitive polyimide photoresist (PSPI)-->1,2,4,5-TETRACYANOBENZENE-->1,2,4,5-Benzenetetrakis(carbonyl chloride)-->1,2,4,5-BENZENETETRACARBOXAMIDE |
| Hazard Information | Back Directory | [Hazard]
Skin irritant, may be carcinogenic.
| [Chemical Properties]
White powder.
Absorbs moisture slowly if exposed to atmosphere.
Soluble in alcohol, slightly soluble in water.
| [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. | [Uses]
Pyromellitic acid (PMA) is mainly used as intermediate for powder coating. Product Data Sheet | [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. | [Definition]
ChEBI: A tetracarboxylic acid that is benzene substituted by four carboxy groups at positions 1, 2, 4 and 5 respectively. | [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.] |
|
|