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Benzothiadiazole (BT Series)
![4,7-dibromo-5,6-bis(octyloxy)benzo[c][1,2,5] thiadiazole, CAS#: 1192352-08-1](http://www.cal-os.com/wp-content/uploads/2016/04/BT007-WB.png "BT007, CAS#: 1192352-08-1")
![4,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl) benzo[c][1,2,5]thiadiazole, CAS.#: 934365-16-9](http://www.cal-os.com/wp-content/uploads/2016/04/BT008-WB-300x221.png "BT008")
![4,7-dibromo-5-fluorobenzo[c][1,2,5]thiadiazole, CAS.#: 1347736-74-6](http://www.cal-os.com/wp-content/uploads/2016/04/BT009-WB-300x221.png "BT009")
![4,7-bis(5-bromothiophen-2-yl)-5,6-difluorobenzo[c][1,2,5]thiadiazole, CAS.#: 1304773-89-4](http://www.cal-os.com/wp-content/uploads/2016/04/BT010-WB.png "BT010")
