Sulphites; thiosulphates

HS v2022 Code: 2832

Chapter	Heading	Sub-heading
28	32	n/a

Code	2832
Version	HS v2022
Hierarchy Level	4
Datasource	WCO
Chapter	28

Ancestor Codes: Inorganic chemicals; organic and inorganic compounds of precious metals; of rare earth metals, of radio-active elements and of isotopes

This Code: Sulphites; thiosulphates

Child Codes: Thiosulphates; Sulphites; of sodium; Sulphites; other than of sodium

Sibling Codes (Nearest 5): Chlorates and perchlorates; bromates and perbromates; iodates and periodates; Sulphides; polysulphides whether or not chemically defined; Dithionites and sulphoxylates; Sulphates; alums; peroxosulphates (persulphates); Nitrites; nitrates

About sulphites; thiosulphates

HS code 2832 covers a group of inorganic chemical compounds known as sulphites and thiosulphates. These compounds play a vital role in various industries, including food preservation, water treatment, and textile manufacturing. As essential ingredients in many chemical processes, sulphites and thiosulphates contribute significantly to the global economy and are widely traded internationally.

Production process

The production of sulphites and thiosulphates typically involves the reaction of sulfur dioxide (SO2) with various alkaline or alkaline earth compounds. This process can be carried out through a range of methods, such as the direct absorption of SO2 into an alkaline solution, the reaction of sulfur with an alkaline compound, or the thermal decomposition of sulfur-containing minerals. The specific production techniques may vary depending on the desired end product and the scale of the operation.

Production inputs

The main inputs required for the production of sulphites and thiosulphates include sulfur, alkaline or alkaline earth compounds (such as sodium, potassium, or calcium compounds), and energy sources for the various chemical reactions and processing steps. Additionally, specialized equipment, such as reactors, filtration systems, and drying units, are necessary to ensure the efficient and consistent production of these compounds.

Production outputs

The primary outputs of HS code 2832 are various forms of sulphites and thiosulphates, which find applications in a wide range of industries. These compounds are commonly used as food preservatives, water treatment agents, reducing agents, and intermediates in the production of other chemicals. Some of the related HS codes that may consume the outputs of 2832 include 2833 (Sulphates; alums; peroxosulphates (persulphates)) and 2842 Other inorganic salts and peroxosalts, among others.

Family tree for sulphites; thiosulphates

    graph LR
    A["<a href='/classifications/hs/v2022/28'>28: Inorganic chemicals; organic and inorganic compounds of precious metals; of rare earth metals, of radio-active elements and of isotopes</a>"]
A --> B["<a href='/classifications/hs/v2022/2832'>2832: Sulphites; thiosulphates</a>"]

    A --> C["<a href='/classifications/hs/v2022/2801'>2801: Fluorine, chlorine, bromine and iodine</a>"]
A --> D["<a href='/classifications/hs/v2022/2802'>2802: Sulphur; sublimed or precipitated, colloidal sulphur</a>"]
A --> E["<a href='/classifications/hs/v2022/2803'>2803: Carbon; carbon blacks and other forms of carbon n.e.c.</a>"]
A --> F["<a href='/classifications/hs/v2022/2804'>2804: Hydrogen, rare gases and other non-metals</a>"]
A --> G["<a href='/classifications/hs/v2022/2805'>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/v2022/2806'>2806: Hydrogen chloride (hydrochloric acid); chlorosulphuric acid</a>"]
A --> I["<a href='/classifications/hs/v2022/2807'>2807: Sulphuric acid; oleum</a>"]
A --> J["<a href='/classifications/hs/v2022/2808'>2808: Nitric acid; sulphonitric acids</a>"]
A --> K["<a href='/classifications/hs/v2022/2809'>2809: Diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined</a>"]
A --> L["<a href='/classifications/hs/v2022/2810'>2810: Oxides of boron; boric acids</a>"]
A --> M["<a href='/classifications/hs/v2022/2811'>2811: Inorganic acids and other inorganic oxygen compounds of non-metals; n.e.c. in heading no. 2806 to 2810</a>"]
A --> N["<a href='/classifications/hs/v2022/2812'>2812: Halides and halide oxides of non-metals</a>"]
A --> O["<a href='/classifications/hs/v2022/2813'>2813: Sulphides of non-metals; commercial phosphorus trisulphide</a>"]
A --> P["<a href='/classifications/hs/v2022/2814'>2814: Ammonia; anhydrous or in aqueous solution</a>"]
A --> Q["<a href='/classifications/hs/v2022/2815'>2815: Sodium hydroxide (caustic soda); potassium hydroxide (caustic potash) peroxides of sodium or potassium</a>"]
A --> R["<a href='/classifications/hs/v2022/2816'>2816: Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides of strontium or barium</a>"]
A --> S["<a href='/classifications/hs/v2022/2817'>2817: Zinc; oxide and peroxide</a>"]
A --> T["<a href='/classifications/hs/v2022/2818'>2818: Aluminium oxide (including artificial corundum); aluminium hydroxide</a>"]
A --> U["<a href='/classifications/hs/v2022/2819'>2819: Chromium oxides and hydroxides</a>"]
A --> V["<a href='/classifications/hs/v2022/2820'>2820: Manganese oxides</a>"]
A --> W["<a href='/classifications/hs/v2022/2821'>2821: Iron oxides and hydroxides; earth colours containing 70% or more by weight of combined iron evaluated as Fe2o3</a>"]
A --> X["<a href='/classifications/hs/v2022/2822'>2822: Cobalt oxides and hydroxides; commercial cobalt oxides</a>"]
A --> Y["<a href='/classifications/hs/v2022/2823'>2823: Titanium oxides</a>"]
A --> Z["<a href='/classifications/hs/v2022/2824'>2824: Lead oxides; red lead and orange lead</a>"]
A --> BA["<a href='/classifications/hs/v2022/2825'>2825: Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides</a>"]
A --> BB["<a href='/classifications/hs/v2022/2826'>2826: Fluorides; fluorosilicates, fluoroaluminates and other complex fluorine salts</a>"]
A --> BC["<a href='/classifications/hs/v2022/2827'>2827: Chlorides; chloride oxides and chloride hydroxides; bromides and bromide oxides; iodides and iodide oxides</a>"]
A --> BD["<a href='/classifications/hs/v2022/2828'>2828: Hypochlorites; commercial calcium hypochlorite; chlorites; hypobromites</a>"]
A --> BE["<a href='/classifications/hs/v2022/2829'>2829: Chlorates and perchlorates; bromates and perbromates; iodates and periodates</a>"]
A --> BF["<a href='/classifications/hs/v2022/2830'>2830: Sulphides; polysulphides whether or not chemically defined</a>"]
A --> BG["<a href='/classifications/hs/v2022/2831'>2831: Dithionites and sulphoxylates</a>"]
A --> BH["<a href='/classifications/hs/v2022/2833'>2833: Sulphates; alums; peroxosulphates (persulphates)</a>"]
A --> BI["<a href='/classifications/hs/v2022/2834'>2834: Nitrites; nitrates</a>"]
A --> BJ["<a href='/classifications/hs/v2022/2835'>2835: Phosphinates (hypophosphites), phosphonates (phosphites), and phosphates; and polyphosphates, whether or not chemically defined</a>"]
A --> BK["<a href='/classifications/hs/v2022/2836'>2836: Carbonates; peroxocarbonates (percarbonates); commercial ammonium carbonate containing ammonium carbamate</a>"]
A --> BL["<a href='/classifications/hs/v2022/2837'>2837: Cyanides, cyanide oxides and complex cyanides</a>"]
A --> BM["<a href='/classifications/hs/v2022/2839'>2839: Silicates; commercial alkali metal silicates</a>"]
A --> BN["<a href='/classifications/hs/v2022/2840'>2840: Borates; peroxoborates (perborates)</a>"]
A --> BO["<a href='/classifications/hs/v2022/2841'>2841: Salts of oxometallic or peroxometallic acids</a>"]
A --> BP["<a href='/classifications/hs/v2022/2842'>2842: Salts of inorganic acids or peroxoacids, n.e.c. including aluminosilicates whether or not chemically defined, but excluding azides</a>"]
A --> BQ["<a href='/classifications/hs/v2022/2843'>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/v2022/2844'>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/v2022/2845'>2845: Isotopes other than those of heading no. 2844; compounds, inorganic or organic, of such isotopes, whether or not chemically defined</a>"]
A --> BT["<a href='/classifications/hs/v2022/2846'>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/v2022/2847'>2847: Hydrogen peroxide; whether or not solidified with urea</a>"]
A --> BV["<a href='/classifications/hs/v2022/2849'>2849: Carbides, whether or not chemically defined</a>"]
A --> BW["<a href='/classifications/hs/v2022/2850'>2850: Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading no. 2849</a>"]
A --> BX["<a href='/classifications/hs/v2022/2852'>2852: Inorganic or organic compounds of mercury, excluding amalgams, whether or not chemically defined</a>"]
A --> BY["<a href='/classifications/hs/v2022/2853'>2853: Phosphides, chemically defined or not, not ferrophosphorus; other inorganic compounds n.e.c. (including distilled, conductivity water and water of like purity); liquid air, rare gases removed or not; compressed air; amalgams, not precious metal amalgams</a>"]

    B --> BZ["<a href='/classifications/hs/v2022/283210'>283210: Sulphites; of sodium</a>"]
B --> CA["<a href='/classifications/hs/v2022/283220'>283220: Sulphites; other than of sodium</a>"]
B --> CB["<a href='/classifications/hs/v2022/283230'>283230: Thiosulphates</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 level6
class CA level6
class CB 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