2-Methylbenzoic acid
o-Toluic acid
CAS: 118-90-1
Molecular Formula: C8H8O2
2-Methylbenzoic acid - Names and Identifiers
| Name | o-Toluic acid |
| Synonyms | o-toluic o-Toluic acid 2-methylbenzoate ortho-toluic acid o-TOLUIC ACID pure 2-methyl-benzoicaci 2-Methylbenzoic acid Benzoicacid,2-methyl- ORTHO TOLUIC ACID ( OTA ) cadmium bis(2-methylbenzoate) |
| CAS | 118-90-1 |
| EINECS | 204-284-9 |
| InChI | InChI=1/C8H8O2/c1-6-4-2-3-5-7(6)8(9)10/h2-5H,1H3,(H,9,10)/p-1 |
| InChIKey | ZWLPBLYKEWSWPD-UHFFFAOYSA-N |
2-Methylbenzoic acid - Physico-chemical Properties
| Molecular Formula | C8H8O2 |
| Molar Mass | 136.15 |
| Density | 1.062 g/mL at 25 °C (lit.) |
| Melting Point | 102-104 °C (lit.) |
| Boling Point | 258-259 °C (lit.) |
| Flash Point | 148 °C |
| Solubility | Soluble in ethanol, soluble in chloroform and boiling water, slightly soluble in cold water. |
| Vapor Presure | 0.00603mmHg at 25°C |
| Appearance | ochre powder |
| Specific Gravity | 1.062 |
| Color | White to slightly yellow |
| Merck | 14,9535 |
| BRN | 1072103 |
| pKa | 3.91(at 25℃) |
| PH | 3.1 (H2O, 20℃)(saturated aqueous solution) |
| Storage Condition | Sealed in dry,Room Temperature |
| Stability | Stable. Combustible. Incompatible with strong oxidizing agents, strong bases. |
| Sensitive | Easily absorbing moisture |
| Refractive Index | 1.512 |
| MDL | MFCD00002477 |
| Physical and Chemical Properties | Character: White flammable prisms or needle crystals. melting point 103~105 ℃ boiling point 258~259 ℃ relative density 1.062 refractive index 1.512 solubility slightly soluble in water, soluble in ethanol, ether and chloroform. |
| Use | It is mainly used for the synthesis of pesticides, pharmaceuticals and organic chemical raw materials, and is currently the main raw material for the production of herbicide Rice |
2-Methylbenzoic acid - Risk and Safety
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R22 - Harmful if swallowed |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S22 - Do not breathe dust. |
| WGK Germany | 3 |
| RTECS | XU1400000 |
| TSCA | Yes |
| HS Code | 29163900 |
2-Methylbenzoic acid - Nature
Open Data Verified Data
White flammable prisms or needle crystals, low toxicity. Micro-soluble in water, soluble in ethanol, ether and chloroform, with steam volatilization. The relative density was 1. 062. The melting point was 103-105 °c. Boiling Point (100. 125kPa) 258~259 deg C. Refractive index 512. Ionization Constant 1.2*10 A 5.
Last Update：2024-01-02 23:10:35
2-Methylbenzoic acid - Preparation Method
Open Data Verified Data
with O-xylene as raw material, cobalt naphthenate as catalyst, at a temperature of 120 deg C, pressure 0. Under 245MPa, O-xylene continuously enters the oxidation tower for air oxidation, and the oxidation liquid enters the stripping tower for concentration, and is crystallized and centrifuged to obtain a finished product. The mother liquor was distilled to recover O-xylene and part of O-Toluic acid, and then the residue was discharged.
Last Update：2022-01-01 10:43:04
2-Methylbenzoic acid - Introduction
Can volatilize with water vapor.. Moderate toxicity, half lethal dose (rat, oral) 400mg/kg.
Last Update：2022-10-16 17:12:28
2-Methylbenzoic acid - Use
Open Data Verified Data
It is mainly used for the synthesis of initiator MBPO and fungicide phosphoramide. Also used in the production of spices and film.
Last Update：2022-01-01 10:43:04
2-Methylbenzoic acid - Safety
Open Data Verified Data
- This product toxicity: Rat oral LD50400mg/kg. Mice were intraperitoneally injected with lds0420mg/kg. See benzoic acid.
- packaging using plastic woven bags. According to the general provisions of the storage and transportation of chemicals. See benzoic acid.
Last Update：2022-01-01 10:43:04
2-Methylbenzoic acid - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | is mainly used for the synthesis of pesticide, medicine and organic chemical raw materials. currently, it is the main raw material for the production of herbicide rice without grass o-methyl benzoic acid is the intermediate of fungicides antirust amine, phenoxy, trifloxazole and herbicide bensulfuron-methyl. used as pesticide fungicide phosphoramide, perfume, vinyl chloride polymerization initiator MBPO, m-cresol, color film developer and other organic synthesis intermediates. It is used in organic synthesis intermediates, pesticide industry to produce fungicide phosphoramide, and can also be used in spices and film films. o-methylbenzoic acid is an important intermediate in the synthesis of many fine chemicals, which is used to prepare initiator MBPO, bactericide phosphoramide, perfume, film film, etc. |
| Production method | is obtained by catalytic oxidation of o-xylene. With o-xylene as raw material and cobalt naphthenate as catalyst, o-xylene continuously enters the oxidation tower for air oxidation at a temperature of 120 ℃ and a pressure of 0.245MPa, and the oxidation liquid enters the stripper for concentration, crystallization and centrifugation to obtain the finished product. The mother liquor is distilled, o-xylene and some o-methylbenzoic acid are recovered, and the slag is discharged. The yield was 74%. O-xylene (95%)1300kg is consumed per ton of product. the preparation method is to continuously oxidize o-xylene with air in the presence of cobalt naphthenate catalyst under the conditions of reaction temperature 120~125 ℃ and pressure 196~392kPa in an oxidation tower to obtain a finished product. |
Last Update：2024-04-09 02:00:06
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