Like other companies globally, we faced supply chain disruptions across our business in 2021 and the early part of 2022, which led to increased costs, delays and in some cases lost opportunities. As a result of these supply chain disruptions, our procurement and operational business functions increased planning and strategic purchasing and sourced products internationally where needed. Because we source certain products from outside the United States, major changes in tax policy, import or export regulations or trade relations, such as the disallowance of tax deductions for imported products or the imposition of additional tariffs or duties on imported products, could adversely affect our business, results of operations, effective income tax rate, liquidity and net income.
The variability and complexity of tariffs and duties exposes us to the risk of higher costs and inadvertent noncompliance associated with our imported products. In December 2022, we recorded $13.0 million within Cost of sales related to duties and tariffs for certain imported chemicals that we determined, prior to submission of final liquidation amounts of our import duties and tariffs, that the initial code we used to classify the product may only apply to bulk purchases. To protect against potential penalties and receive clarification on the issue, we voluntarily filed a disclosure with U.S. Customs and Border Protection in December 2022. Changes in laws, court rulings, or differences in interpretation on product classification could lead to changes in duty and tariff rates on these or other imported products.