3,4-dimethyl-pheno
3,4-Dimethylphenol
CAS: 95-65-8
Molecular Formula: C8H10O
3,4-dimethyl-pheno - Names and Identifiers
| Name | 3,4-Dimethylphenol |
| Synonyms | 3 3,4-Xylenol 1,3,4-Xylenol 4-Dimethylphenol 4,5-Dimethylphenol 3,4-dimethyl-pheno 3,4-Dimethylphenol 3,4-DIMETHYLPHENOL PESTANAL 1,2-Dimethyl-4-hydroxybenzene 3, 4-Xylenol (3,4-Dimethylphenol) |
| CAS | 95-65-8 |
| EINECS | 202-439-5 |
| InChIKey | YCOXTKKNXUZSKD-UHFFFAOYSA-N |
3,4-dimethyl-pheno - Physico-chemical Properties
| Molecular Formula | C8H10O |
| Molar Mass | 122.16 |
| Density | 1,138 g/cm3 |
| Melting Point | 65-68°C |
| Boling Point | 227°C(lit.) |
| Flash Point | 61 °C |
| JECFA Number | 708 |
| Water Solubility | SLIGHTLY SOLUBLE |
| Solubility | Chloroform (Slightly), Ethyl Acetate (Slightly), Methanol (Slightly) |
| Vapor Presure | 0.475-130Pa at 25-66.2℃ |
| Appearance | Crystalline Powder |
| Color | Off-white to pale cream |
| Exposure Limit | ACGIH: TWA 1 ppm |
| Merck | 14,10082 |
| BRN | 1099267 |
| pKa | pK1:10.32 (25°C) |
| Storage Condition | Store below +30°C. |
| Explosive Limit | 1.4%(V) |
| Refractive Index | 1.5442 |
| Physical and Chemical Properties | Character: White needle crystal. melting point 66~68 ℃ boiling point 225 ℃ relative density 0.9830 solubility slightly soluble in water, soluble in ethanol, ether. |
| Use | For the preparation of modified polyimide, pesticides, dyes, etc |
3,4-dimethyl-pheno - Risk and Safety
| Risk Codes | R24/25 - R34 - Causes burns R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 2261 6.1/PG 2 |
| WGK Germany | 3 |
| RTECS | ZE6300000 |
| TSCA | Yes |
| HS Code | 29071400 |
| Hazard Class | 6.1 |
| Packing Group | II |
3,4-dimethyl-pheno - Reference Information
| FEMA | 3596 | 3,4-XYLENOL |
| LogP | 2.23 at 25℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| toxicity | GRAS(FEMA). |
| usage limit | FEMA(mg/kg): baked products 4.0; Meat products, soup, meat, nut products, instant coffee and tea, household spices, 2.0. |
| Application | used in the manufacture of modified polyimides, pesticides, dyes, etc. Industrial xylenol is rich in 3, 4-xylenol, 3, 5-xylenol, therefore, can be used as a source of 3, 4-xylenol, 3, 5-xylenol, and can be used as a raw material for disinfectants, plasticizers, pesticides and the like. 3, 4-xylenol is used in the preparation of imine resins (engineering plastics), disinfectants, pesticides, dyes and spices. 3, 5-dimethylphenol is used as a disinfectant, an insecticide, a perfume, a dye, an antioxidant, a raw material of a synthetic resin, and the like. for the preparation of modified polyimide, pesticides, dyes, etc. |
| production method | the crude phenol obtained from the wash oil fraction of coal tar by sodium hydroxide saponification and sulfuric acid acidification contains phenol, cresol and xylenol. The mixed xylenol can be obtained by crude phenol separation, and 3, 5-xylenol is removed by rectification, the residue is distilled, the 225-229 ° C. Fraction is collected, cooled and crystallized, and centrifuged to obtain 3, 4-xylenol. In addition, O-Xylene is used as a raw material, and the product can also be obtained by sulfonation, alkali fusion, acid precipitation and distillation. |
| category | toxic substances |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50: 727 mg/kg; Oral-mouse LD50: 400 mg/kg |
| explosive hazard characteristics | corrosive to skin and cornea |
| flammability hazard characteristics | flammable in case of open flame and high heat; Combustion-induced smoke |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from the oxidant. |
| extinguishing agent | Sand, foam, carbon dioxide, water mist. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 15:16:53
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