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Product Name: Petro-paraxylene  
Trade Mark: Sanren Brand  
Alternative Name: ?  
Molecular formula/Structural Formula:
Production Process: The product is made from mixed C8 aromatics, C8 aromatics obtained from transalkylation of toluene and C9 aromatics through isomerizaion, adsorption stripping and rectification.  
Properties: Petro-paraxylene is colourless transparent liquid with acromatic smell.It is toxic.When the temperature is low,it tends to be crystallized.Under the normal temperature,its vapor is inflammable,heavier than air and be dispersed.The liquid phase is lighter than water.The paraxylene vapor and air could form an explosive mixture with the explosion limits between 1.0-7.0 Vol.%. The flash point is 25℃ and ignition point 525℃.  
Grade: ?  
National Standard Grade: ?  
Enterprise Standard Grade: ?  
Specifications:

SH1486-1998(Industrial Standard)

No.

Item

Quality Criteria

Testing

Method

Premium grade

1st grade

1

Appearance

Transparent and clear, no deposit

1)

2

Purity, %(m/m) >=

99.5

99.2

SH/T 1489

3

Non-aromatics content,%(m/m) <=

0.101)

0.20

SH/T 1489

SH/T 1488

4

Tuluene content, %(m/m) <=

0.10

-

SH/T 1489

5

Ethyl benzene content, %(m/m) <=

0.30

-

SH/T 1489

6

Meta-xylene content, %(m/m) <=

0.30

-

SH/T 1489

7

Ortho-xylene content, %(m/m) <=

0.10

-

SH/T 1489

8

Colour(Platinum-Cobalt No.) <=

10

20

GB /T 3143

9

Pickling colourimetric number <=

The colour of acid shall not be deeper than that of standard solution containing 0.10g potassium bichromate in 1000 mL dilute acid

The colour of acid shall not be deeper than that of standard solution containing 0.25g potassium bichromate in 1000 mL dilute acid

GB/T 2012

10

Bromine index, mgBr/100g <=

200

200

SH/T 1551

11

Total sulphur content <=

0.0002

0.0005

SH/T 1147

12

Boiling range under 101.3kPa,including 138.3℃ <=

1.0

2.0

GB/T 3146

  Note:1) Visual check at 18.3℃-25.6℃ after sample is poured in 100 mL graduated cylinder.
 
Scope of Application: ?  
Major Applications: The product can be used as raw material for organic synthesis, mainly used for making dimethyl terephthalate and terephthalic acid etc. Used as intermediates for plastics and polyester fibre, as well as raw material for coating, dyestuff and agricultural 
Process Method: ?  
Packing: Bulk  
Packing Size: ?  
Storage: Tank  
Transportation: Rail tanker, tank truck, vessel and pipeline.  
Safety Precautions: 1. Paraxylene is an inflammable liquid. During storage and transportation, it must be kept away from fire/heat sources and direct sunlight.
2. Paraxylene is easy to be crystallized. When in stock, thermal insulation device must be provided. At the same time, guard against leakage and carry out handling in closed conditions.
3. In compliance with the relevant Government Ordinance concerning hazardous chemicals, due formalities must be gone through for the permission of transportation. Static electricity discharger must be provided to prevent static electricity from being accumulated. Fire fighting device must be equipped as well.
4. Paraxylene is harmful to human body. Its vapor with a high concentration is anesthetic. One could be seriously poisoned if inhale it. Repeated inhalation of low concentration paraxylene vapor can result in chronic poisoning. It irritates eyes, skin and upper respiratory tract. While handling, labour protection articles must be provided. Safety education should be conducted for those involved in handling. 
SPC

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