Meta-xylene 

meta-xylene is an aromatic hydrocarbon that has a benzene ring and two methyl groups attached to it. The most important application of meta-xylene is in the production of isophthalic acid. meta-xylene has neuropathic effects.  

Name of matter (Persian): Meta-xylene 

The name of the substance (English): Meta-Xylene 

Brand (Farsi): Meta-xylene 

Brand name: Meta-Xylene 

Other names: 1 and 3 dimethylbenzene, 3- methyl toluene 

The word Xylene or Xylol is said to be a mixture of three aromatic hydrocarbons isomer, which has a benzene ring and two methyl groups attached to it. Xylenes are used as solvents in paint and plastics and synthetic adhesives. Xylenes are clear, colorless, and well-smelled and highly flammable liquids. This material is typically obtained from the refining of crude oil in the alkylation process. The meta-xylene isomerism of xylenes is the two methyl groups in the benzene ring located on atoms 1 and 3. The chemical formula is methylene C8H10. Methylene is also known as m-xylene.  

Indications: 

The raw material is synthetic paints, pharmaceuticals, insecticides, and solvents. The most commonly used meta-xylene is in the production of isophthalic acid, which is used in the production of PET copolymer. 

Physical and chemical properties: 

Molecular formula: C8H10 

Molar mass: 106.16 g / mol 

Appearance: Colorless liquid 

Density: 0.86 g / mL 

Melting point: -48 C, 225 K, -54 F 

Boiling point: 139 C, 412 K, 282 F 

Solubility in water: insoluble 

Solubility in ethanol: very soluble 

Solubility in diethyl ether: very soluble 

Refractive index (nD) 1.49722 

Viscosity: 0.8059 cP at 0 C 0.6200 cP at 20 ° C 

Production methods: 

Xylenes are commonly found in the process of alkylation during crude oil refining. 

Chemical reactions: 

In combination with conventional oxidants, it becomes carboxylic acid.  

Safety Information: 

Xylene has neurological effects. In the event of permanent contact or in the form of prolonged periods, it may cause headaches, muscle dysfunction, dizziness, and imbalance. Contact with xylene in the short term causes irritation of the skin, eyes, nose, and pharynx. Xylene is highly flammable. 

*** 

Paraxylene 

Para-xylene is an organic compound of the family of aromatic hydrocarbons. Para-xylene is one of the xylene isomers with a benzene ring and two methyl groups attached to it. The most important application of para-xylene is in the production of isophthalic acid. Para-xylene affects the brain and can cause dizziness.  

The name of the material (Persian): 1 and 4 dimethylbenzene 

English name: 1,4-dimethylbenzene 

Brand (Persian): Para Xylan 

Brand (English): Para-Xylene 

Other names: 1 and 4 dimethylbenzene, 4-methyl toluene  

Para represents the position of the two methyl bundles along each other on the benzene ring. Other xylene isomers include o-xylene and m-xylene. Para-xylene is widely used in the production of terephthalic acid for polyester. The polymer derived from it is known as Parylene.  

Indications: 

Synthetic raw material, terephthalic acid, pharmaceutical industry, insecticides, and solvents 

Physical and chemical properties: 

Molecular Formula: C8H10 

Molar mass: 106.16 g / mol