We are synthesizing a tetra amino biphenyl system, in the process we are getting dark brown product, however we need off white color for this product, any suggestions for this problem.,


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Kathy Grotsch6 months ago

Is this pre- or post- column chromatography? What is the purity by TLC/GC-MS? Most often in organic chemistry the brown color will be from some sort of impurity.

kiran devarasetty6 months ago

@Kathy, The product is being synthesized on multi kilogram level and one of my customer is asking to improve the colour. The purity of the product is 99 % by HPLC.

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