XYLENES, MIXED
XYLENE
CAS: 128686-03-3
Molecular Formula: C24H30
XYLENES, MIXED - Names and Identifiers
| Name | XYLENE |
| Synonyms | XYLOL XYLENE XYLENES XYLENES IRGACOR 153 XYLENES, MIXED NAPHTHA SOLVENT DIMETHYLBENZENES AQUALINE STANDARD 5.0 |
| CAS | 128686-03-3 |
| EINECS | 603-293-9 |
XYLENES, MIXED - Physico-chemical Properties
| Molecular Formula | C24H30 |
| Molar Mass | 318.49 |
| Density | 0.86g/mLat 25°C(lit.) |
| Melting Point | -34 °C |
| Boling Point | 137-140°C(lit.) |
| Flash Point | 77°F(lit.) |
| Vapor Presure | 18 mm Hg ( 37.7 °C) |
| Vapor Density | 3.7 (vs air) |
| Appearance | Liquid |
| Color | Clear colorless |
| Refractive Index | n20/D 1.497(lit.) |
XYLENES, MIXED - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R10 - Flammable R20/21 - Harmful by inhalation and in contact with skin. R38 - Irritating to the skin |
| Safety Description | 25 - Avoid contact with eyes. |
| UN IDs | UN 1307 3/PG 3 |
| WGK Germany | 2 |
| RTECS | ZE2100000 |
XYLENES, MIXED - Introduction
Xylene (C8H10) is an organic compound that is one of the isomers of benzene. It has the following properties:
1. Appearance: Colorless transparent liquid.
2. Odor: Has a special aromatic odor.
3. Density: 0.87 g/cm ³。
4. Melting point: -47 ℃.
5. Boiling point: 139 ℃.
6. Solubility: Soluble in most organic solvents, insoluble in water.
7. Stability: It can exist stably at room temperature, but is flammable under high temperatures and open flames.
The main uses of xylene include:
1. It is widely used as organic synthetic raw material for the preparation of dyes, resins, rubber, essence, spices and other chemicals.
2. Used as a solvent and can be used in the manufacturing of paints, adhesives, cleaning agents, etc.
3. Used for manufacturing plastics to make them plasticized.
4. As an additive for automotive fuel, it improves combustion efficiency.
5. Used for manufacturing chemical agents such as disinfectants and insecticides.
There are two common methods for preparing xylene:
1. Preparation by methylation of toluene: Benzene is reacted with methyl chloride (such as chloromethane) and catalyzed by an acidic catalyst to obtain xylene.
2. Preparation through alkylation of hydrocarbons: Ethane reacts with methane, catalyzed by acidic catalysts, and undergoes multi-step reactions to obtain xylene.
Xylene has certain safety risks and precautions:
1. It may have an impact on the central nervous system and respiratory system, and long-term exposure may cause symptoms such as dizziness, drowsiness, and pneumonia.
2. May have irritating effects on eyes and skin, and contact should be avoided.
3. High concentrations of xylene vapor can cause dizziness, headaches, etc. Long term exposure to high concentrations of vapor should be avoided.
4. Extremely flammable, may explode when exposed to open flames or high temperatures.
When using xylene, attention should be paid to avoiding contact with skin and eyes, ensuring good ventilation, and taking protective measures such as wearing protective glasses, gloves, and masks.
Last Update：2024-04-09 21:11:58
