3.3' , 5.5'-Tetramethylbenzidine, 5mg
https://www.ibtb.org/shop/24-sc-206697-3-3-5-5-tetramethylbenzidine-5mg-11095
https://www.ibtb.org/web/image/product.template/11095/image_1920?unique=5d15378
This , is guaranteed a 5.5'-Tetramethylbenzidine, with the use of 3.3' and directly supplied to your lab by Gentaur's warehouse.
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