Naphthalene Sulfonic Acid Salts from United States
Naphthalene sulfonic acid salts are sodium salts of naphthalene sulfonic acids, acting as anionic dispersants and surfactants in dye manufacturing and concrete admixtures. The fused aromatic ring system classifies them under this tariff item as anionic organic surface-active agents, other than those specified elsewhere.
Duty Rate — United States → Canada
6.5%
Import Tips
• Confirm the specific salt form (e.g
• sodium) and its concentration, as different salts may have different classifications
• Provide technical documentation showing the product's dispersant properties to support classification
• Check if the product is subject to any Canadian concrete admixture standards