Vihita Chem Pvt. Ltd. Supplies Isovanilin. Vihita Chem Pvt. Ltd. Is the manufacturer and exporter of drugs and fragrance intermediates and speciality chemicals. The Isovanilin has CAS NO.: 621-59-0, Molecular Formulae: HOC6H3 [OCH3] CHO and Mol. Wt: 152.15. This Isovanilin comes in ivory crystalline powder form. It can be availed in 25 kg HDPE drums.