2-METHOXY-4-NITROBENZENEDIAZONIUM TETRAFLUOROBORATE; FAST RED B TETRAFLUOROBORATE SALT; FAST RED B-SALT; FAST RED B TETRAFLUOROBORATE; C.I. Azoic Diazo Component 5, tetrafluoroborate salt; Fast res B, tetrafluoroborate salt; 2-Methoxy-4-nitrobenzenediazonium salt; 5-Nitroanisole-2-diazonium chloride