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类别：MX
English name:3,5-DimethylphenolMolecular formula:C8H10OMolecular weight:122.Chemicalbook16···
English name:3,5-Dimethylphenol
Molecular formula:C8H10O
Molecular weight:122.Chemicalbook16
EINECS number:203-606-5
Related categories: aromatics; goods in stock; Organic compounds; Organic standard solution; Organic synthetic intermediates; Chemical industry; Analytical standard; Phenol; Pharmaceutical raw materials; Chemical intermediates; 3,5-Xylenol; intermediate; Technical intermediate; Chemical raw Materials-1;AromaticPhenols;Phenolesandthiophenoles;Carbamate insecticides; Pesticide intermediates; Pesticide intermediateBuildingBlocks;C6toC8;ChemicalSynthesis;OrganicBuildingBlocks;Antibacterialagent;Others,Azetidines;Antioxidant;MX;Organic chemistry; 3,5-dimethylphenol; Other raw materials;OxygenCompounds;PhenolsMolfile:108-68-9.mol
3,5-Dimethylphenol（MX）nature
| melting point | 61-64°C(lit.) | boiling point | 222°C(lit.) |
| density | 1.115 | Refractive index | 1.5146(estimate) |
| flash point | 109°C | Storage conditions | roomtemp |
| form | CrystallineSolid | Acidity coefficient(pKa) | pK1:10.15(25°C) |
| color | Whitetoorange | Water solubility | 5.3g/L(25ºC) |
| Merck14 | 10082BRN774117InChIKeyTUAMRELNJMMDMT-UHFFFAOYSA-N | CAS database | 108-68-9(CASDataBaseReference) |
| NIST chemical information | Phenol,3,5-dimethyl-(108-68-9) | EPA chemical information | 3,5-Dimethylphenol(108-68-9) |
Application and synthetic method of 3,5-dimethylphenol (MX)
chemical property:
White needle crystal. Soluble in water and ethanol.
Purpose:
--It is used to make phenolic resin, medicine, pesticide, dye and explosive
--3,5-Xylenol is an intermediate for preparing carbamate insecticide methomyl. It can also be used in the production of rubber accelerator, anti-aging agent, medicine, perfume, phenolic resin, etc. it can also be used as an additive of steel rolling cold rolling oil, which can prolong the service life of cold rolling oil.
--It is used in the production of pesticides, rubber accelerators, antioxidants, drugs, spices, phenolic resins, etc. It is also used as an additive of cold rolling oil for steel rolling, which can prolong the service life of cold rolling oil.
Production method:
--Mixed xylenol was rectified, and the fraction at 218-222 ℃ was collected. After cooling, crystallization and centrifugal separation, industrial grade 3,5-Xylenol was obtained. The product with purity of 98% can be obtained by recrystallization with toluene. M-xylene was sulfonated with concentrated sulfuric acid at 185 ℃, neutralized at 60-90 ℃, alkali melted at about 350 ℃, acidified with sulfuric acid, and finally distilled under reduced pressure to obtain 3,5-Xylenol with a yield of 65%.
--The mixed xylenol was rectified, and the fraction at 218 ~ 222 ℃ was collected. The industrial grade 3,5-Xylenol was obtained by cooling crystallization and centrifugation. The product with purity of 9.8% can be obtained by recrystallization with toluene. M-xylene was sulfonated with concentrated sulfuric acid at 185 ℃, neutralized at 60 ~ 90 ℃, alkali melted at about 350 ℃, acidified with sulfuric acid, and finally distilled under reduced pressure to obtain 3,5-Xylenol with a yield of 65%.
| Category | Toxic substances |
| Toxicity classification | High toxicity |
| Acute toxicity | Oral - rat LD50: 608 mg / kg Oral - mouse LD50: 477 mg / kg |
| Stimulus data | Eyes - Rabbit 0.25 mg severe |
| Flammability hazard characteristics | Combustible; Combustion releases toxic chloride fumes |
| Storage and transportation characteristics | The warehouse is ventilated and dry at low temperature; Store and transport separately from food raw materials, alkalis and oxidants |
| Fire extinguishing agent | Carbon dioxide, sand, foam, dry powder |
Security information
| Dangerous goods sign | T | Hazard category code | 24/25-34 |
| Safety instructions | 26-28-36/37/39-45-28A | Dangerous goods transportation number | UN22616.1/PG2 |
| UN22616.1/PG2 | 2 | RTECS number | ZE6475000 |
| TSCA | Yes | HazardClass | 6.1 |
| PackingGroup | II | Customs code | 29071400 |
| Toxic substance data | 108-68-9(HazardousSubstancesData) |
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