+ CHECK THE PRODUCTS AND CUSTOMERS OR SUPPLIERS OF TRATAMIENTO DE AGUAS SOCIEDAD ANONIMA
| Description | HS CODE |
| Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated... | 2904 |
| Aldehydes, whether or not with other oxygen function; cyclic polymers of aldehydes; paraformaldehyde... | 2912 |
| Polycarboxylic acids, their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives... | 2917 |
| Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined... | 2923 |
| Other organo-inorganic compounds... | 2931 |
| Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds... | 2934 |
| Organic surface-active agents (other than soap); surface-active preparations, washing preparations (including auxiliary washing preparations) and cleaning preparations, whether or not containing soap, other than those of heading No 3401... | 3402 |
| Composite diagnostic/lab reagents, except pharmaceutical preparations of heading 3002 or 3006... | 3822 |
| Industrial monocarboxylic fatty acids; acid oils from refining; industrial fatty alcohols... | 3823 |
| Prepared binders for foundry moulds or cores; chemical products and preparations of the chemical or allied industries (including those consisting of mixtures of natural products), not elsewhere specified or included... | 3824 |
