Methyl 4-tert- butylbenzoate (PTBBMe) 1.  26537-19-9 2.  3-4345 3.  192.25 4.  Appearance:  Purity(as dry basis): 99.0%min. 5.   6.   7.  C 1.  CAS No. 2.  Existing & New Chemical      Substances in Japan     3.  Molecular Weight   4.  Specification   5.  Packing   6.  Use   7.  Development Stage      • C: Commercially available      • O: Made-to-order      • R: Under R&D