|The merchandise covered by each of these investigations is sodium nitrite in any form, at any purity level. In addition, the sodium nitrite covered by these investigations may or may not contain an anti-caking agent. Examples of names commonly used to reference sodium nitrite are nitrous acid, sodium salt, anti-rust, diazotizing salts, erinitrit, and filmerine. The chemical composition of sodium nitrite is NaNO2 and it is generally classified under subheading 2834.10.1000 of the Harmonized Tariff Schedule of the United States (HTSUS). The American Chemical Society Chemical Abstract Service (CAS) has assigned the name “sodium nitrite” to sodium nitrite. The CAS registry number is 7632-00-0. While the HTSUS subheading, CAS registry number, and CAS name are provided for convenience and customs purposes, the written description of the scope of these investigations is dispositive.