Lactones containing an incompatible atom other than the oxygen atom in the Acton group (eg, de lactone), in the same loop, are not classified in this sub-heading. In such cases, the additional incompatible corn should be taken into account when determining the item. Therefore, for example, the Citric acid, for example, must enter subheading 2932.99 and not subheading 2932.29.
If the acetic function is part of two or more rings, and if one of these rings does not contain an additional incompatible atom (other than the oxygen atom in the lactone group), the molecule is lactone.
Lactone formation in subheading 2932.29 Lactone groups shall contain at least one carbon atom separated by each end of the chain. This sub-item, however, does not include those products in which the carbon atom is adjacent to the lactone group of the acso group (C = O), the amenio group (C = NH) or the thiococcus group (C = S).
If the acetic function is part of two or more rings, and if one of these rings does not contain an additional incompatible atom (other than the oxygen atom in the lactone group), the molecule is lactone.
Lactone formation in subheading 2932.29 Lactone groups shall contain at least one carbon atom separated by each end of the chain. This sub-item, however, does not include those products in which the carbon atom is adjacent to the lactone group of the acso group (C = O), the amenio group (C = NH) or the thiococcus group (C = S).
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Carboxylic acids