Section 06 Products of the chemical or allied 38 Miscellaneous chemical products 38 04 Residual lyes from the manufacture of wood pulp (excl. tall oil) 38 04 00 Calcium lignin sulphonates (Ca2LS) binder used for fire-brick production 38 04 00 20 Calcium lignin sulphonates (Ca2LS) binder used for fire-brick production Commodity Code Description 38 04 00 20 00 Calcium lignin sulphonates (Ca2LS) binder used for fire-brick production