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NAME: Direct Red 4BE / Direct Scarlet 4BE / Direct Red 28 / Congo Red  CLICKS: 2215  
Product Information
Product Name: Direct Red 4BE / Congo Red
C.I. No.: Direct Red 28
CAS NO: 573-58-0
Chemical Formula: C32H22N6Na2O6S2
Molecular Weight: 696.6632
H.S Code: 32041400
Testing report:
Testing Items Standard Indicator Testing Result
Apprearance  Red Powder Red Powder
Color Shade :  Similar to standard Similar to standard
Content (%):  1003 100%
Moisture (%): 5.0 2.75
Insolubles (%): 1.0 0.45
Conclusion: Qualified
1.mainly used for cotton,viscose and other cellulose fabric dyeing,with excellent dye-uptake,but migration property is not so good;
2.not used for direct printing,but can be used for discharge printing as ground color.
3.not only used for natural silk, wool and paper coloring,but also used as acid-base indicator.
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