HS Code for Polysulphide

Polysulphide polymers are classified under HS code 3911.90. This classification is determined by the General Rules for the Interpretation of the Harmonized System (GRI), specifically GRI 1 and 6. Chapter 39 covers plastics and articles thereof. Heading 3911 is designated for petroleum resins, coumarone-indene resins, polyterpenes, polysulphides, polysulphones, and other products of chemical synthesis not elsewhere specified or included, in primary forms. Since polysulphides are synthetic polymers that do not fall under the more specific headings of 3901 to 3910, they are categorized here. The primary forms designation refers to liquids and pastes, including dispersions and solutions, or blocks of irregular shape, lumps, powders, granules, flakes, and similar bulk forms. These polymers are valued for their chemical resistance and are frequently used in high-performance sealants and adhesives.

Products Included

• Liquid polysulphide polymers
• Solid polysulphide resins in primary forms
• Chemically synthesized polysulphide elastomers
• Polysulphide dispersions and solutions

Common Misclassification

Polysulphides are frequently misclassified under HS code 4002, which covers synthetic rubber. However, 4002 is only applicable if the product meets specific vulcanization and elasticity criteria defined in Note 4 to Chapter 40. Additionally, prepared polysulphide sealants or caulking compounds are often incorrectly placed in 3911.90, but should actually be classified under HS code 3214.10 as glaziers' putty or sealing compounds.

FAQ

What is the HS code for Polysulphide?

The HS code for polysulphide in primary forms is 3911.90.

What is the difference between 3911 and 4002 for polymers?

Heading 3911 covers products of chemical synthesis like polysulphides in primary forms, while 4002 is reserved for synthetic rubbers that can be cross-linked with sulfur and meet specific recovery tests after stretching.