What is O-Toluic Acid CAS 118-90-1?

CAS 118-90-1 is o-toluic acid, also called 2-methylbenzoic acid or ortho-toluic acid, with the molecular formula C8H8O2. It is a white to off-white crystalline aromatic carboxylic acid.

What are the key physical properties of o-toluic acid?

The compound typically melts around 103-105 degrees C and boils around 258-260 degrees C. It is only slightly soluble in water but dissolves readily in organic solvents such as ethanol and ether.

How is o-toluic acid distinguished from m-toluic and p-toluic acid?

All three toluic acid isomers share the same molecular formula, but the methyl group is attached at different positions on the benzene ring. In o-toluic acid the methyl group is ortho to the carboxylic acid group, giving it a distinct CAS number and different melting point and reactivity profile.

What are the main industrial uses of O-Toluic Acid CAS 118-90-1?

It is used as an intermediate in pharmaceutical and agrochemical synthesis, including antibiotics, fungicides, and herbicides. It also serves as a precursor for dyes, pigments, heterocyclic compounds, and other specialty organic chemicals.

Is o-toluic acid suitable for direct water-based formulations?

It has low water solubility at room temperature, so it is usually handled in organic solvent systems or used as a reactive intermediate rather than as a directly dissolved aqueous additive. Process conditions and solvent choice should match the downstream chemistry.

O-Toluic Acid CAS 118-90-1

o-Toluic acid, identified by CAS 118-90-1, is a white to off-white crystalline aromatic carboxylic acid that serves as a fundamental building block within the Chemical Intermediates sector for diverse industrial syntheses. This 2-methylbenzoic acid derivative functions as a critical precursor in the production of agrochemicals, particularly fungicides and herbicides, as well as pharmaceutical agents and specialized polymerization initiators. In organic synthesis, the methyl group at the ortho position influences the reactivity of the carboxyl group, allowing for the precise construction of heterocyclic compounds and specialized dyes through acylation and esterification processes. We provide this material with competitive factory pricing to support the large-scale manufacturing of technical-grade chemicals and pharmaceutical precursors, ensuring all batches meet customized specifications regarding particle size and isomer purity. Our logistics network is designed for reliable bulk supply, and every consignment is delivered with full technical support, including MSDS, TDS, COA, to facilitate seamless integration into complex production workflows.

CAS: 118-90-1
Synonyms: 2-Methylbenzoic acid, Ortho-toluic acid, 2-Toluic acid, o-Methylbenzoic acid, 2-Carboxytoluene
Einecs: 204-284-9
Molecular Formula: C8H8O2
Grade: Industrial Grade / Pharmaceutical Grade
Package: 25kg/fiber drum or 500kg/bulk bag

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Product Description

1 Technical Data (Physicochemical Properties)

2 Applications

3 Storage & Safety

4 Quality Assurance

Technical Data (Physicochemical Properties)

Property	Specification (Typical Export Standard)
Appearance	White or light yellow crystalline powder
Assay (HPLC/GC)	≥ 99.0%
Melting Point	102.0°C – 105.0°C
Boiling Point	258°C – 259°C
Loss on Drying	≤ 0.5%
Ash Content	≤ 0.1%
Solubility	Soluble in ethanol and ether; slightly soluble in water

Applications

Agrochemical Synthesis: Used as a vital intermediate in the production of systemic fungicides and various herbicides, where the ortho-methyl group provides specific biological activity.
Pharmaceutical Intermediates: Acts as a precursor for various medicinal compounds, including anti-inflammatory agents and specialized reagents for drug discovery.
Polymer Additives: Employed in the manufacture of high-performance polymerization initiators and as a modifier for specific resin systems.
Dyes and Pigments: Utilized as an intermediate in the synthesis of organic pigments and aromatic colorants for the textile and plastics industries.

For a non-methyl-substituted aromatic carboxylic-acid intermediate, Benzoic Acid is a separate precursor for formulation and synthesis work.

Storage & Safety

Storage: Store in a cool, dry, and well-ventilated warehouse. Keep containers tightly closed when not in use. Protect from moisture and keep away from incompatible substances like strong oxidizing agents and bases.
Handling: Avoid direct contact with skin and eyes. Prevent inhalation of dust or vapors during bulk handling or charging operations.
PPE Recommendations: Wear protective gloves (nitrile or neoprene), chemical safety goggles, and a dust mask (N95 or equivalent) in environments where dust may be generated. A full-body protective suit is recommended for large-scale industrial handling.

Quality Assurance

Our manufacturing facility operates under rigorous quality control standards to ensure the high purity required for sensitive synthetic applications. We utilize Gas Chromatography (GC) and HPLC analysis for every batch to monitor isomer distribution and organic impurities. Our process stability allows us to maintain a narrow melting range and low moisture levels, providing the consistency needed for high-yield chemical reactions and pharmaceutical-grade production.

FAQ - Technical & Supply Chain

Q:
What is O-Toluic Acid CAS 118-90-1?

A: CAS 118-90-1 is o-toluic acid, also called 2-methylbenzoic acid or ortho-toluic acid, with the molecular formula C8H8O2. It is a white to off-white crystalline aromatic carboxylic acid.
Q:
What are the key physical properties of o-toluic acid?

A: The compound typically melts around 103-105 degrees C and boils around 258-260 degrees C. It is only slightly soluble in water but dissolves readily in organic solvents such as ethanol and ether.
Q:
How is o-toluic acid distinguished from m-toluic and p-toluic acid?

A: All three toluic acid isomers share the same molecular formula, but the methyl group is attached at different positions on the benzene ring. In o-toluic acid the methyl group is ortho to the carboxylic acid group, giving it a distinct CAS number and different melting point and reactivity profile.
Q:
What are the main industrial uses of O-Toluic Acid CAS 118-90-1?

A: It is used as an intermediate in pharmaceutical and agrochemical synthesis, including antibiotics, fungicides, and herbicides. It also serves as a precursor for dyes, pigments, heterocyclic compounds, and other specialty organic chemicals.
Q:
Is o-toluic acid suitable for direct water-based formulations?

A: It has low water solubility at room temperature, so it is usually handled in organic solvent systems or used as a reactive intermediate rather than as a directly dissolved aqueous additive. Process conditions and solvent choice should match the downstream chemistry.

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