2-(4-Methylphenyl)propanoic acid
Synonym(s):2-(4-Methylphenyl)propanoic acid;Ibuprofen Impurity D (Ph. Eur.);Ibuprofen impurity D (PhEur);α,4-Dimethylphenylacetic acid;(2RS)-2-(4-Methylphenyl)propionic acid
- CAS NO.：938-94-3
- Empirical Formula: C10H12O2
- Molecular Weight: 164.2
- MDL number: MFCD01111378
- EINECS: 627-324-0
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-04-16 16:04:49
What is 2-(4-Methylphenyl)propanoic acid?
Chemical properties
clear yellow liquid after melting
The Uses of 2-(4-Methylphenyl)propanoic acid
2-(p-Tolyl)propionic acid is an impurity of Ibuprofen (I140000). Ibuprofen impurity D.
The Uses of 2-(4-Methylphenyl)propanoic acid
2-(p-Tolyl)propionic acid (Ibuprofen EP Impurity D) is an impurity of Ibuprofen (I140000). Ibuprofen impurity D.
Synthesis Reference(s)
Synthesis, p. 231, 1984 DOI: 10.1055/s-1984-30784
Tetrahedron Letters, 36, p. 5641, 1995 DOI: 10.1016/0040-4039(95)01035-G
General Description
α,4-Dimethylphenylacetic acid is also referred to as 2-(4-methylphenyl)propanoic acid. It is an alkaline decomposition product of azalomycin-B, a macrolide antibiotic produced by Streptomyces hygroscopicus var. azalomyceticus. The reaction of pinonic acid with bromine in water affords 2-(4-methylphenyl)propanoic acid.
Properties of 2-(4-Methylphenyl)propanoic acid
| Melting point: | 37-42 °C(lit.) |
| Boiling point: | 231.67°C (rough estimate) |
| Density | 1.0041 (rough estimate) |
| refractive index | 1.518-1.52 |
| Flash point: | >230 °F |
| storage temp. | Sealed in dry,Room Temperature |
| solubility | Chloroform (Slightly), Methanol (Slightly) |
| form | Solid |
| pka | 4.44±0.10(Predicted) |
| color | White to Off-White Low-Melting |
| BRN | 2251315 |
| CAS DataBase Reference | 938-94-3(CAS DataBase Reference) |
Safety information for 2-(4-Methylphenyl)propanoic acid
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for 2-(4-Methylphenyl)propanoic acid
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