m-Toluic acid
CAS 99-04-7
EC 202-723-9
Formula C8H8O2
MW 136.15 g/mol
Organic Acids Personal Care & CosmeticsPharmaceuticals & HealthcareCoatings, Adhesives, Sealants & ElastomersFood & Nutrition CatalysisPreservation & BiocideAntioxidant & Stabilizer
Description
m-Toluic acid (CAS 99-04-7) is an aromatic carboxylic acid also known as 3-toluic acid, meta-toluic acid, and m-toluylic acid. It carries no assigned E-code and is classified under EC 202-723-9. It is commercially available as a crystalline solid with a molecular formula of C8H8O2.
In pharmaceutical synthesis, m-toluic acid serves as a reaction intermediate and pH-regulating catalyst, where its ionization constant of 5.3 × 10-5 governs proton-transfer behaviour in controlled environments. In personal care formulations, it functions as a preservative and antimicrobial agent, disrupting microbial cell membranes at low concentrations. Coatings manufacturers also employ it as an antioxidant stabilizer to inhibit oxidative degradation.
m-Toluic acid is supplied in technical and pharmaceutical grades, with procurement governed by REACH registration requirements applicable to EU importers and downstream users. Standard packaging formats include fibre drums and multi-layer bags. Buyers should request a certificate of analysis confirming purity specifications aligned with relevant pharmacopoeial standards.
In pharmaceutical synthesis, m-toluic acid serves as a reaction intermediate and pH-regulating catalyst, where its ionization constant of 5.3 × 10-5 governs proton-transfer behaviour in controlled environments. In personal care formulations, it functions as a preservative and antimicrobial agent, disrupting microbial cell membranes at low concentrations. Coatings manufacturers also employ it as an antioxidant stabilizer to inhibit oxidative degradation.
m-Toluic acid is supplied in technical and pharmaceutical grades, with procurement governed by REACH registration requirements applicable to EU importers and downstream users. Standard packaging formats include fibre drums and multi-layer bags. Buyers should request a certificate of analysis confirming purity specifications aligned with relevant pharmacopoeial standards.
Physical Properties
| Melting Point | 108.7 °C |
| Boiling Point | 215-216 °C |
| Density | 1.054 g/mL at 25 °C(lit.) |
| Flash Point | 150 °C |
| Appearance | White to yellowish crystals. Ionization constant 5.3 × 10?5. Slightly soluble in water; soluble in alcohol and ether. Combustible. |
| Color | Slightly yellow to beige-yellow |
| Odor | Floral-honey odor |
| Form | Crystalline Solid |
| Water Solubility | <0.1 g/100 mL at 19 ºC |
| Vapor Pressure | 0.019Pa at 25℃ |
| Refractive Index | 1.509 |
| pH | 3.4 (H2O, 20℃)(saturated solution) |
| Log P | 2.37 |
Safety & Handling (Learn More)
Danger GHS05 GHS07
H
H302H318
P
P264P270P280P317P330P501P264+P265P301+P317P305+P354+P338
Trade & Regulatory
| HS Code | 29163900 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 3 |
Other Names
3-toluic acidmeta-toluic acid3-methylbenzoic acidM-TOLUYLIC ACID3-methyl-benzoicaci
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Derivatives
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