Sudan 4, certified, 0.25g Back Catalog number: C16986104 Availability: In the manufacturer's stock Price on request - + Recommended 675786 Tetrasul, 100 µg/ml, Ethyl acetate, 5ml Price on request 1746.9-K-IO 3-Methylbenzofuran, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 21535-97-7 Price on request 22005 Acid Surrogate Standard Price on request