Exclusive webinar

The Traceability Gap: Managing Risk Across Suppliers Beyond Tier 1

HS Code Lookup for Heading 2837

HS Code Lookup helps classify products under appropriate HS code and find duties applicable across 140+ countries. Find and discover HS classification, tariffs, taxes, controls, rulings, ECCNs, and default and preferential duties for HS code 2837.

Heading 2837

Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes - Cyanides, cyanide oxides and complex cyanides.

List of Sub Headings & Description

283711 Of sodium

283719 Other

283720 Complex cyanides

WCO Notes for Heading 2837

28.37 ‑ Cyanides, cyanide oxides and complex cyanides.

‑ Cyanides and cyanide oxides :

2837.11 ‑ ‑ Of sodium

2837.19 ‑ ‑ Other

2837.20 ‑ Complex cyanides

Subject to the exclusions mentioned in the introduction to this sub‑Chapter, this heading covers cyanides, cyanide oxides (oxycyanides) and complex cyanides.

(A) CYANIDES

Cyanides are the metal salts of hydrogen cyanide (hydrocyanic acid) (HCN) (heading 28.11). These salts are very poisonous.

(1) Sodium cyanide (NaCN). Obtained by the action of coke or hydrocarbon gases and atmospheric nitrogen on sodium carbonate, by treating calcium cyanamide (see heading 31.02) with charcoal or by the interaction of pulverised coal, sodium and gaseous ammonia. White powder, plates or paste, crystalline, hygroscopic, very soluble in water and with an odour of bitter almonds. When brought to the melting‑point it absorbs oxygen; may also give hydrates. Is presented in sealed vessels. Used in the metallurgy of gold or silver, in gold‑ or silver‑plating, in photography, in lithography, as a parasiticide or insecticide, etc. Also used in the preparation of hydrogen cyanide, other cyanides and indigo; in flotation processes (in particular for separating galena from blende and pyrites from chalcopyrite).

(2) Potassium cyanide (KCN). Obtained by similar methods, has similar characteristics and uses to sodium cyanide.

(3) Calcium cyanide (Ca(CN)₂). White or greyish powder according to its degree of purity, soluble in water. Used for destroying insects, fungus and noxious animals.

(4) Nickel cyanide (Ni(CN)₂). Hydrated, greenish plates or powder; amorphous, a yellow powder. Used in metallurgy and in electroplating.

(5) Copper cyanides.

(a) Cuprous cyanide (CuCN). White or greyish powder, insoluble in water. Used for the same purposes as cupric cyanide and in medicine.

(b) Cupric cyanide (Cu(CN)₂). Amorphous powder, insoluble in water, easily decomposed. Used for plating iron with copper and in organic synthesis.

(6) Zinc cyanide (Zn(CN)₂). White powder, insoluble in water, used in electroplating.

The heading excludes cyanides of mercury (heading 28.52) and cyanides of non-metals, such as bromine cyanide (heading 28.53).

(B) HEXACYANOFERRATES (II) (FERROCYANIDES)

Hexacyanoferrates (II) (ferrocyanides) are the metal salts of hydrogen hexacyanoferrate (II) (H₄Fe(CN)₆) (heading 28.11). Obtained from spent oxide treated with calcium hydroxide or from the action of ferrous hydroxide on cyanides. Decomposed by heat.

The most important are :

(1) Tetrammonium hexacyanoferrate ((NH₄)₄Fe(CN)₆). Crystals soluble in water. Used for “black nickel‑plating” and as a catalyst in the synthesis of ammonia.

(2) Tetrasodium hexacyanoferrate(Na₄Fe(CN)₆.10H₂O). Yellow crystals, unaffected by air, soluble in water, especially when hot. Used for preparing hydrogen cyanide and Prussian blue, thio‑indigo, etc.; to case‑harden steel; in photography; in dyeing (as a mordant or as a blue tint); in printing (as an oxidising agent in aniline black printing) and as a fungicide.

(3) Tetrapotassium hexacyanoferrate (K₄Fe(CN)₆.3H₂O). Yellow crystals, efflorescent, soluble in water, especially when hot. Same uses as tetrasodium hexacyanoferrate.

(4) Dicopper hexacyanoferrate (Cu₂Fe(CN)₆.xH₂O). Purplis brown powder, insoluble in water. Used for preparing Florentine or Van Dyck brown for artists’ paints.

(5) Double hexacyanoferrates (e.g., dilithium dipotassium hexacyanoferrate Li₂K₂(Fe(CN)₆).3H₂O).

The heading excludes Prussian blue (Berlin blue) and other pigments based on hexacyanoferrates (heading 32.06).

Hexacyanoferrates (III) (ferricyanides) are the salts of hydrogen hexacyanoferrate (III) (H₃Fe(CN)₆) (heading 28.11).

The most important are :

(1) Trisodium hexacyanoferrate (Na₃Fe(CN)₆.H₂O). Obtained by the action of chlorine on hexacyanoferrates (II); garnet‑coloured crystals, deliquescent, soluble in water and toxic; in aqueous solution it is greenish and decomposed by light. Used in dyeing and printing; in photography; for case‑hardening; in electroplating; and as an oxidising agent in organic synthesis.

(2) Tripotassium hexacyanoferrate (K₃Fe(CN)₆). Similar appearance to trisodium hexacyano- ferrates but less deliquescent. Same uses.

(D) OTHER COMPOUNDS

These include pentacyanonitrosylferrates (II), pentacyanonitrosylferrates (III), cyanocadmates, cyanochromates, cyanomanganates, cyanocobaltates, cyanoniccolates, cyanocuprates, etc., of inorganic bases.

This group includes, for example, sodium pentacyanonitrosylferrate (III) (sodium nitroprusside or sodium nitroferricyanide) (Na₂Fe(CN)₅NO.2H₂O), used in chemical analysis.

Cyanomercurates are, however, excluded (heading 28.52).

FAQs

What is HS code 2837?

HS code 2837 includes Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes - Cyanides, cyanide oxides and complex cyanides..

How many sub-headings are there in HS code 2837?

There are 3 sub-heading(s) in HS code 2837.

What is an HS Code and Why Does it Hold For Cross-Border Trade?

HS code is a standardized six-digit numerical classification system developed by the World Customs Organization (WCO) and acts as a universal language for simplifying the process of identifying and classifying traded products. They ensure consistent customs clearance, enable accurate duty calculation, and help identify relevant trade regulations. This simplifies the process for businesses, saving time, reducing risk, and promoting informed decision-making.

What are Controls and Why should Businesses Focus on Them?

In global trade, controls refer to a set of regulations and policies implemented by governments to manage the import and export of goods and services. These controls can take various forms, including tariffs, quotas, embargoes, export controls, and licensing requirements. Companies should prioritize understanding and adhering to them for compliance, reduced risk of legal issues, mitigating reputational damage, staying competitive, and building trust with governments.

What are Tariffs in Global Trade and Why should Businesses Focus on Them?

In global trade, tariffs are a type of tax levied by a government on imported goods. They act as a financial barrier to entry, increasing the overall cost of the imported product for domestic consumers and businesses. By understanding how tariffs work and their potential impact, companies can make informed decisions about pricing, sourcing, and market expansion, ultimately ensuring their competitiveness in the global marketplace.

What are FTAs in Global Trade and Why should Businesses Focus on Them?

In global trade, Free Trade Agreements (FTAs) are legally binding agreements between two or more countries aimed at reducing or eliminating barriers to trade between them. By understanding the terms of relevant FTAs and strategically incorporating them into their business plans, companies can enjoy reduced costs, expanded market access, and a more competitive edge in international trade.