Colloidal precious metals; whether or not chemically defined

HS v2017 Code: 284310

About colloidal precious metals; whether or not chemically defined

HS code 284310 covers the trade and production of colloidal precious metals, which are finely dispersed particles of precious metals suspended in a liquid or solid medium. These materials have a wide range of industrial and technological applications, from catalysts and electronics to medical and cosmetic products. As a key component in many high-value manufacturing processes, the colloidal precious metals industry plays an important role in the global economy.

Production process

Colloidal precious metals are typically produced through chemical reduction or electrochemical methods. In the chemical reduction process, a precious metal salt is reduced in the presence of a stabilizing agent, forming the colloidal particles. Electrochemical methods involve the dissolution of a precious metal anode and the subsequent precipitation of the colloidal particles at the cathode. The size and properties of the final product can be controlled by adjusting factors such as pH, temperature, and the choice of reducing and stabilizing agents.

Production inputs

The main inputs required for the production of colloidal precious metals include the precious metal salts or compounds (such as gold, silver, or platinum), reducing agents, and stabilizing agents. Specialized equipment, such as reactors, filtration systems, and particle size analyzers, are also essential for the manufacturing process. Additionally, the industry relies on a skilled workforce with expertise in chemistry, materials science, and process engineering.

Production outputs

Colloidal precious metals produced under HS code 284310 are used in a wide range of applications, including 852390 catalysts, 854411 electronic components, 300650 medical and pharmaceutical products, and 330499 cosmetics. The output of this industry is often consumed by manufacturers in these related industries, who incorporate the colloidal precious metals into their final products.

Revisions to 284310

Classification codes are adjusted frequently. The code may have been revised or replaced between system versions. The table below shows the history (newest to oldest) of the code 284310. The most recent 1 version of this code (284310) is in the HS v2022 system:

This page shows a legacy version of code 284310 ( HS v2017).

Older versions

Family tree for colloidal precious metals; whether or not chemically defined

    graph LR
    A["<a href='/classifications/hs/v2017/28'>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/v2017/2843'>2843: Colloidal precious metals; inorganic or organic compounds of precious metals, whether or not chemically defined; amalgams of precious metals</a>"]
B --> C["<a href='/classifications/hs/v2017/284310'>284310: Colloidal precious metals; whether or not chemically defined</a>"]

    B --> D["<a href='/classifications/hs/v2017/284321'>284321: Silver compounds; silver nitrates</a>"]
B --> E["<a href='/classifications/hs/v2017/284329'>284329: Silver compounds; excluding silver nitrates</a>"]
B --> F["<a href='/classifications/hs/v2017/284330'>284330: Gold compounds</a>"]
B --> G["<a href='/classifications/hs/v2017/284390'>284390: Inorganic or organic compounds of precious metals, n.e.c.; amalgams</a>"]

    

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    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 level6
class D level6
class E level6
class F level6
class G level6

  class C 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 C highlight