CAS 100-42-5 appears in our catalog under these names: Styrene, 99.5% stab. with 4-tert-butylcatechol , Styrene, 99%, stab. with 10-15ppm 4-tert-butylcatechol . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 50ml, 250ml, 1L, 2500ml, 100ml, 500ml.