5-Bromo-4-chloro-3-indolyl 2-Acetamido-2-deoxy-3,​4,​6-​triacetate-α-D-galactopyranoside is an intermediate for the synthesis of 5-Bromo-4-chloro-3-indolyl 2-Acetamido-2-deoxy-α-D-galactopyranoside (B682250), which is a histochemical substrate for a-N-acetyl-galactosaminidase.