Organic Acids
REACH
m-toluic acid
CAS Number
99-04-7
EC Number
202-723-9
Abbreviation
3-MBA
What is m-toluic acid?
m-Toluic acid (CAS 99-04-7), also known as 3-MBA, is an aromatic carboxylic acid used as a building block and functional intermediate.
Where is m-toluic acid used?
- Pharmaceutical manufacturing: key intermediate in synthesis
- Coatings and resins: catalyst precursor or crosslinking component influencing cure rates and film performance
- Preservation systems: biocidal agent providing microbial control without halogenated compounds
- Personal care: antioxidant stabilizer extending shelf life
- As an acid intermediate it acts as a starting material where controlled esterification or salt formation is required.
Good to know: Pharma-grade material typically meets USP or BP specifications.
Commercial specifications
- Bulk quantities for industrial procurement and smaller quantities for R&D and formulation development
Other Names (Synonyms)
meta-toluic acid|3-toluic acid|3-methylbenzoic acid|m-Toluylic acid|Benzoic acid, 3-methyl-|m-Methylbenzoic acid|beta-Methylbenzoic acid|beta-Bethylbenzoic acid|3-MBA
What are the physical properties of m-toluic acid?
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
How is m-toluic acid classified and handled safely? Learn More
Danger
GHS05· Corrosive GHS07· Irritant
Hazard Statements
H302 Harmful if swallowed
H318 Causes serious eye damage
Precautionary Statements
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P317 Get emergency medical help.
Which trade and regulatory codes apply to m-toluic acid?
HS Code 29163900
Storage Class 11 - Combustible Solids
WGK (Germany) 3