A thermoplastic composition comprising: a copolycarbonate comprising bisphenol A carbonate units and second carbonate units of the formula wherein R a and R b are each independently a C 1-12 alkyl, C 1-12 alkenyl, C 3-8 cycloalkyl, or C 1-12 alkoxy, each R 3 is independently a C 1-6 alkyl, R 4 is hydrogen, C 2-6 alkyl or phenyl optionally substituted with 1 to 5 C 1-6 alkyl groups, p, q, and j are each independently 0 to 4, optionally a bisphenol A homopolycarbonate; and 2 to 40 ppm of an organosulfonic stabilizer of the formula wherein each R 7 is independently a C 1-30 alkyl, C 6-30 aryl, C 7-30 alkylarylene, C 7-30 arylalkylene, or a polymer unit derived from a C 2-32 ethylenically unsaturated aromatic sulfonic acid or its ester, and R 8 is C 1-30 alkyl; or R 8 is a group of the formula -S(=O) 2 -R 7 ; wherein the second carbonate units are present in an amount of 20 to 49 mol%, preferably 30 to 40 mol% based on the sum of the moles of the copolycarbonate and the bisphenol A homopolycarbonate; and wherein the thermoplastic composition has a Vicat B120 of 160°C or higher measured according to ISO 306 and a yellowness index of less than 12, preferably less than 8, more preferably less than 6 measured according to ASTM D1925 on a plaque of 2.5 mm thickness molded at a temperature of 355°C for a residence time of 10 minutes. a copolycarbonate comprising bisphenol A carbonate units and second carbonate units of the formula wherein R a and R b are each independently a C 1-12 alkyl, C 1-12 alkenyl, C 3-8 cycloalkyl, or C 1-12 alkoxy, each R 3 is independently a C 1-6 alkyl, R 4 is hydrogen, C 2-6 alkyl or phenyl optionally substituted with 1 to 5 C 1-6 alkyl groups, p, q, and j are each independently 0 to 4, R a and R b are each independently a C 1-12 alkyl, C 1-12 alkenyl, C 3-8 cycloalkyl, or C 1-12 alkoxy, each R 3 is independently a C 1-6 alkyl, R 4 is hydrogen, C 2-6 alkyl or phenyl optionally substituted with 1 to 5 C 1-6 alkyl groups, p, q, and j are each independently 0 to 4, optionally a bisphenol A homopolycarbonate; and 2 to 40 ppm of an organosulfonic stabilizer of the formula wherein each R 7 is independently a C 1-30 alkyl, C 6-30 aryl, C 7-30 alkylarylene, C 7-30 arylalkylene, or a polymer unit derived from a C 2-32 ethylenically unsaturated aromatic sulfonic acid or its ester, and R 8 is C 1-30 alkyl; or R 8 is a group of the formula -S(=O) 2 -R 7 ; each R 7 is independently a C 1-30 alkyl, C 6-30 aryl, C 7-30 alkylarylene, C 7-30 arylalkylene, or a polymer unit derived from a C 2-32 ethylenically unsaturated aromatic sulfonic acid or its ester, and R 8 is C 1-30 alkyl; or R 8 is a group of the formula -S(=O) 2 -R 7 ; wherein the second carbonate units are present in an amount of 20 to 49 mol%, preferably 30 to 40 mol% based on the sum of the moles of the copolycarbonate and the bisphenol A homopolycarbonate; and wherein the thermoplastic composition has a Vicat B120 of 160°C or higher measured according to ISO 306 and a yellowness index of less than 12, preferably less than 8, more preferably less than 6 measured according to ASTM D1925 on a plaque of 2.5 mm thickness molded at a temperature of 355°C for a residence time of 10 minutes. <EOS>