4316-23-8

Basic information

• Product Name: 4-Methylphthalic acid
• Synonyms: RARECHEM AL BO 0981;4MPA;4-METHYLPHTALIC ACID;4-METHYLPHTHALIC ACID;4-METHYL-1,2-BENZENEDICARBOXYLIC ACID;2-Benzenedicarboxylicacid,4-methyl-1;4-methyl-2-benzenedicarboxylicacid;Phthalic acid, 4-methyl-
• CAS NO: 4316-23-8
• Molecular Formula: C₉H₈O₄
• Molecular Weight: 180.16
• EINECS: 224-333-8
• Product Categories: Phthalic Acids, Esters and Derivatives;Carboxylic Acid Monomers;Monomers;Polymer Science
• Mol File: 4316-23-8.mol
• Article Data: 6

Chemical Properties

• Melting Point: 146-148 °C(lit.)
• Boiling Point: 232.96°C (rough estimate)
• Flash Point: 204.4 °C
• Appearance: white powder.
• Density: 1.1987 (rough estimate)
• Vapor Pressure: 8.24E-07mmHg at 25°C
• Refractive Index: 1.4209 (estimate)
• Storage Temp.: Sealed in dry,Room Temperature
• PKA: 3.32±0.10(Predicted)
• Water Solubility: 3.984g/L(room temperature)
• CAS DataBase Reference: 4-Methylphthalic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 4-Methylphthalic acid(4316-23-8)
• EPA Substance Registry System: 4-Methylphthalic acid(4316-23-8)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26-37/39
• WGK Germany: 3
• Hazardous Substances Data: 4316-23-8(Hazardous Substances Data)

Usage

Chemical Properties

BEIGE CRYSTALLINE POWDER

InChI:InChI=1/C9H8O4/c1-5-2-3-6(8(10)11)7(4-5)9(12)13/h2-4H,1H3,(H,10,11)(H,12,13)/p-2

Upstream product

• 63089-50-9 4-methylphthalonitrile 
• 582-16-1 2,7-dimethylnaphthalene 
• 64-19-7 acetic acid 
• 581-42-0 2.6-dimethylnaphthalene 
• 18595-16-9 2-amino-5-methylbenzoic acid methyl ester 
• 3425-89-6 4-methyl-1,2,3,6-tetrahydrophthalic anhydride 
• 201230-82-2 carbon monoxide 
• 99-04-7 m-Toluic acid 
• 99-94-5 p-Toluic acid 
• 20587-30-8 5-methyl-2-nitro-benzoic acid methyl ester 
• 2305-36-4 4-methylanthranilic acid 
• 26830-96-6 5-methyl-2-cyanoaniline 
• 7664-93-9 sulfuric acid 
• 861072-25-5 6-methyl-2-m-tolyl-naphthalene-1,3-diyldiamine 

Downstream Products

• 536711-07-6 4-methyl-phthalic acid di-tert-butyl ester 
• 20116-65-8 dimethyl 4-methylphthalate 

Relevant articles and documents

Unusual Effects of Acetate Ion on Photosensitized Oxygenation of Naphthalene Derivatives via Electron Transfer

The oxygenation of 2-methylnaphthalene photosensitized by 9,10-dicyanoanthracene in an O2-saturated acetonitrile gave phthalic acid and 4-methylphthalic acid in the presence of Et4NOAc or KOAc/18-crown-6, but different products in the presence of Et4NBF4 and KClO4 and without a salt.The photosensitized ring oxygenation also occured with naphthalene and 2,3-dimethylnaphthalene.

Inclusion complex containing epoxy resin composition for semiconductor encapsulation

The invention is an epoxy resin composition for sealing a semiconductor, including (A) an epoxy resin and (B) a clathrate complex. The clathrate complex is one of (b1) an aromatic carboxylic acid compound, and (b2) at least one imidazole compound represented by formula (II): wherein R2 represents a hydrogen atom, C1-C10 alkyl group, phenyl group, benzyl group or cyanoethyl group, and R3 to R5 represent a hydrogen atom, nitro group, halogen atom, C1-C20 alkyl group, phenyl group, benzyl group, hydroxymethyl group or C1-C20 acyl group. The composition has improved storage stability, retains flowability when sealing, and achieves an effective curing rate applicable for sealing delicate semiconductors.

Oxidation of alkylaromatic hydrocarbons over V2O5-Sb2O3/TiO2 catalyst

Monoalkylbenzenes, polymethylbenzenes, para-substituted toluenes and monomethylnaphthalenes were oxidized in the vapor phase by oxygen-containing gas in the presence of water over a Sb2O3-promoted V2O5/TiO2 catalyst. This type of catalyst yields carboxylic acids with high selectivity. In the oxidation of substituted alkylbenzenes only alkyl groups were oxidized. No products of oxidative dimerization were detected. Only in the oxidation of methylnaphthalenes, also products of aromatic ring oxidation are formed. A correlation between experimental data and results of quantum-chemical calculations of bond dissociation energies is discussed.