Section 06 Products of the chemical or allied 29 Organic chemicals 29 12 Aldehydes, whether or not with other oxygen function; cyclic polymers of aldehydes; paraformaldehyde 29 12 50 - Cyclic polymers of aldehydes 29 12 50 00 - Cyclic polymers of aldehydes Commodity Code Description 29 12 50 00 000 - Cyclic polymers of aldehydes