Sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium.

Family tree for sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium.

    graph LR
    A["<a href='/classifications/hs/v2012/28'>28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes</a>"]
A --> B["<a href='/classifications/hs/v2012/2815'>2815: Sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium.</a>"]

    A --> C["<a href='/classifications/hs/v2012/2801'>2801: Fluorine, chlorine, bromine and iodine.</a>"]
A --> D["<a href='/classifications/hs/v2012/2802'>2802: Sulphur, sublimed or precipitated; colloidal sulphur.</a>"]
A --> E["<a href='/classifications/hs/v2012/2803'>2803: Carbon (carbon blacks and other forms of carbon not elsewhere specified or included).</a>"]
A --> F["<a href='/classifications/hs/v2012/2804'>2804: Hydrogen, rare gases and other non-metals.</a>"]
A --> G["<a href='/classifications/hs/v2012/2805'>2805: Alkali or alkaline-earth metals; rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed; mercury.</a>"]
A --> H["<a href='/classifications/hs/v2012/2806'>2806: Hydrogen chloride (hydrochloric acid); chlorosulphuric acid.</a>"]
A --> I["<a href='/classifications/hs/v2012/2807'>2807: Sulphuric acid; oleum.</a>"]
A --> J["<a href='/classifications/hs/v2012/2808'>2808: Nitric acid; sulphonitric acids.</a>"]
A --> K["<a href='/classifications/hs/v2012/2809'>2809: Diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined.</a>"]
A --> L["<a href='/classifications/hs/v2012/2810'>2810: Oxides of boron; boric acids.</a>"]
A --> M["<a href='/classifications/hs/v2012/2811'>2811: Other inorganic acids and other inorganic oxygen compounds of non-metals.</a>"]
A --> N["<a href='/classifications/hs/v2012/2812'>2812: Halides and halide oxides of non-metals.</a>"]
A --> O["<a href='/classifications/hs/v2012/2813'>2813: Sulphides of non-metals; commercial phosphorus trisulphide.</a>"]
A --> P["<a href='/classifications/hs/v2012/2814'>2814: Ammonia, anhydrous or in aqueous solution.</a>"]
A --> Q["<a href='/classifications/hs/v2012/2816'>2816: Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium.</a>"]
A --> R["<a href='/classifications/hs/v2012/2817'>2817: Zinc oxide; zinc peroxide.</a>"]
A --> S["<a href='/classifications/hs/v2012/2818'>2818: Artificial corundum, whether or not chemically defined; aluminium oxide; aluminium hydroxide.</a>"]
A --> T["<a href='/classifications/hs/v2012/2819'>2819: Chromium oxides and hydroxides.</a>"]
A --> U["<a href='/classifications/hs/v2012/2820'>2820: Manganese oxides.</a>"]
A --> V["<a href='/classifications/hs/v2012/2821'>2821: Iron oxides and hydroxides; earth colours containing 70 % or more by weight of combined iron evaluated as Fe2O3.</a>"]
A --> W["<a href='/classifications/hs/v2012/2822'>2822: Cobalt oxides and hydroxides; commercial cobalt oxides.</a>"]
A --> X["<a href='/classifications/hs/v2012/2823'>2823: Titanium oxides.</a>"]
A --> Y["<a href='/classifications/hs/v2012/2824'>2824: Lead oxides; red lead and orange lead.</a>"]
A --> Z["<a href='/classifications/hs/v2012/2825'>2825: Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides.</a>"]
A --> BA["<a href='/classifications/hs/v2012/2826'>2826: Fluorides; fluorosilicates, fluoroaluminates and other complex fluorine salts.</a>"]
A --> BB["<a href='/classifications/hs/v2012/2827'>2827: Chlorides, chloride oxides and chloride hydroxides; bromides and bromide oxides; iodides and iodide oxides.</a>"]
A --> BC["<a href='/classifications/hs/v2012/2828'>2828: Hypochlorites; commercial calcium hypochlorite; chlorites; hypobromites.</a>"]
A --> BD["<a href='/classifications/hs/v2012/2829'>2829: Chlorates and perchlorates; bromates and perbromates; iodates and periodates.</a>"]
A --> BE["<a href='/classifications/hs/v2012/2830'>2830: Sulphides; polysulphides, whether or not chemically defined.</a>"]
A --> BF["<a href='/classifications/hs/v2012/2831'>2831: Dithionites and sulphoxylates.</a>"]
A --> BG["<a href='/classifications/hs/v2012/2832'>2832: Sulphites; thiosulphates.</a>"]
A --> BH["<a href='/classifications/hs/v2012/2833'>2833: Sulphates; alums; peroxosulphates (persulphates).</a>"]
A --> BI["<a href='/classifications/hs/v2012/2834'>2834: Nitrites; nitrates.</a>"]
A --> BJ["<a href='/classifications/hs/v2012/2835'>2835: Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined.</a>"]
A --> BK["<a href='/classifications/hs/v2012/2836'>2836: Carbonates; peroxocarbonates (percarbonates); commercial ammonium carbonate containing ammonium carbamate.</a>"]
A --> BL["<a href='/classifications/hs/v2012/2837'>2837: Cyanides, cyanide oxides and complex cyanides.</a>"]
A --> BM["<a href='/classifications/hs/v2012/2839'>2839: Silicates; commercial alkali metal silicates.</a>"]
A --> BN["<a href='/classifications/hs/v2012/2840'>2840: Borates; peroxoborates (perborates).</a>"]
A --> BO["<a href='/classifications/hs/v2012/2841'>2841: Salts of oxometallic or peroxometallic acids.</a>"]
A --> BP["<a href='/classifications/hs/v2012/2842'>2842: Other salts of inorganic acids or peroxoacids (including aluminosilicates whether or not chemically defined), other than azides.</a>"]
A --> BQ["<a href='/classifications/hs/v2012/2843'>2843: Colloidal precious metals; inorganic or organic compounds of precious metals, whether or not chemically defined; amalgams of precious metals.</a>"]
A --> BR["<a href='/classifications/hs/v2012/2844'>2844: Radioactive chemical elements and radioactive isotopes (including the fissile or fertile chemical elements and isotopes) and their compounds; mixtures and residues containing these products.</a>"]
A --> BS["<a href='/classifications/hs/v2012/2845'>2845: Isotopes other than those of heading 28.44; compounds, inorganic or organic, of such isotopes, whether or not chemically defined.</a>"]
A --> BT["<a href='/classifications/hs/v2012/2846'>2846: Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium or of mixtures of these metals.</a>"]
A --> BU["<a href='/classifications/hs/v2012/2847'>2847: Hydrogen peroxide, whether or not solidified with urea.</a>"]
A --> BV["<a href='/classifications/hs/v2012/2848'>2848: Phosphides, whether or not chemically defined, excluding ferrophosphorus.</a>"]
A --> BW["<a href='/classifications/hs/v2012/2849'>2849: Carbides, whether or not chemically defined.</a>"]
A --> BX["<a href='/classifications/hs/v2012/2850'>2850: Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 28.49.</a>"]
A --> BY["<a href='/classifications/hs/v2012/2852'>2852: Inorganic or organic compounds of mercury, whether or not chemically defined, excluding amalgams.</a>"]
A --> BZ["<a href='/classifications/hs/v2012/2853'>2853: Other inorganic compounds (including distilled or conductivity water and water of similar purity); liquid air (whether or not rare gases have been removed); compressed air; amalgams, other than amalgams of precious metals.</a>"]

    B --> CA["<a href='/classifications/hs/v2012/281511'>281511: -- Solid</a>"]
B --> CB["<a href='/classifications/hs/v2012/281512'>281512: -- In aqueous solution (soda lye or liquid soda)</a>"]
B --> CC["<a href='/classifications/hs/v2012/281520'>281520: -Potassium hydroxide (caustic potash)</a>"]
B --> CD["<a href='/classifications/hs/v2012/281530'>281530: -Peroxides of sodium or potassium</a>"]


    %% Color coordination by level

    classDef level1 color:#000,fill:#a8f9ff,stroke:#333,stroke-width:2px
    classDef level2 color:#000,fill:#e0a458,stroke:#333,stroke-width:1px
    classDef level3 color:#000,fill:#419d78,stroke:#333,stroke-width:1px
    classDef level4 color:#000,fill:#c04abc,stroke:#333,stroke-width:1px
    classDef level5 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef level6 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef highlight color:#000,fill:#fff,stroke:#000,stroke-width:5px



  %% Apply classes
  class A level2
class B level4
class C level4
class D level4
class E level4
class F level4
class G level4
class H level4
class I level4
class J level4
class K level4
class L level4
class M level4
class N level4
class O level4
class P level4
class Q level4
class R level4
class S level4
class T level4
class U level4
class V level4
class W level4
class X level4
class Y level4
class Z level4
class BA level4
class BB level4
class BC level4
class BD level4
class BE level4
class BF level4
class BG level4
class BH level4
class BI level4
class BJ level4
class BK level4
class BL level4
class BM level4
class BN level4
class BO level4
class BP level4
class BQ level4
class BR level4
class BS level4
class BT level4
class BU level4
class BV level4
class BW level4
class BX level4
class BY level4
class BZ level4
class CA level6
class CB level6
class CC level6
class CD level6

  class B highlight

  %% class A level1
  %% class B,C level2
  %% class D,E,F,G,H,I level2
  %% class J,K,L,M,N,O,P level3
  %% class B highlight