; and magnesium aluminum hydroxide carbonate (synthetic hydrotalcite) (CAS No. 11097–59–9) coated with stearic acid (CAS No. 57–11–4) (provided for in subheading 3812.39.90) Free No change No change On or before 12/31/2020 . 926. Potassium methylate solution Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.38 Potassium methylate solution (CAS No. 865–33–8) (provided for in subheading 3815.90.50) Free No change No change On or before 12/31/2020 . 927. Coflake HZ Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.39 Mixtures of polyethylene glycol (CAS No. 25322–68–3), (acetate) pentammine cobalt dinitrate (CAS No. 14854–63–8), and zinc carbonate (CAS No. 3486–35–9) (provided for in subheading 3815.90.50) Free No change No change On or before 12/31/2020 . 928. Temposil 45 scorch retarder Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.40 Mixture of precipitated silica gel (CAS No. 112926–00–8) and (4-hydroxy-2,2,6,6-tetramethyl-1-piperidinyl)oxidanyl (CAS No. 2226–96–2) of a kind used as polymerization inhibitors (provided for in subheading 3815.90.50) Free No change No change On or before 12/31/2020 . 929. Penta amino aceto nitrate cobalt III Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.41 Mixtures of (acetato) pentammine cobalt dinitrate (CAS No. 14854–63–8) with a polymeric or paraffinic carrier (provided for in subheading 3815.90.50) Free No change No change On or before 12/31/2020 . 930. Branched C24 benzene alkylate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.42 Branched chain C 24 mixed alkylbenzenes (CAS No. 68081–77–6) (provided for in subheading 3817.00.15) 1.5% No change No change On or before 12/31/2020 . 931. Glycol ester Subchapter II of chapter 99 is amended by inserting in numerical sequence the