HS Code for Phenylenediamine

Phenylenediamine is classified under HS code 2921.51 because it is an aromatic polyamine. This specific code covers o-, m-, p-phenylenediamine, diaminotoluenes, and their derivatives, including their salts. These compounds are essential intermediates in the production of hair dyes, engineering polymers, and rubber chemicals. The classification is determined by the chemical structure, specifically the presence of two amine groups attached to a benzene ring. Under the General Rules for the Interpretation (GRI) of the Harmonized System, specifically GRI 1, the product is classified based on the terms of the headings and any relative section or chapter notes. Chapter 29 covers organic chemicals, and heading 2921 specifically addresses amine-function compounds. Subheading 2921.51 is the most specific designation for these isomers. The classification remains consistent regardless of whether the product is in the form of a base or a salt, as the subheading explicitly includes salts thereof. Importers must ensure that the chemical purity meets the standards for Chapter 29, as mixtures or preparations containing these chemicals might be classified elsewhere, such as in Chapter 32 for prepared dyes.

Products Included

• o-Phenylenediamine (1,2-diaminobenzene)
• m-Phenylenediamine (1,3-diaminobenzene)
• p-Phenylenediamine (1,4-diaminobenzene)
• Diaminotoluenes (various isomers)
• Salts of phenylenediamines (e.g., p-phenylenediamine hydrochloride)
• N-substituted derivatives of these amines

Common Misclassification

Phenylenediamine is frequently misclassified under HS code 2921.59, which is a residual category for other aromatic polyamines. However, because 2921.51 specifically names phenylenediamines and diaminotoluenes, it takes precedence. Another common error is classifying these chemicals under 3212.90 if they are intended for use as dyes; however, unless they are already prepared as retail hair dyes (which fall under 3305.90), the raw chemical must remain in Chapter 29.

FAQ

What is the HS code for Phenylenediamine?

The HS code for Phenylenediamine, including its ortho, meta, and para isomers, is 2921.51.

Are derivatives of phenylenediamine included in this code?

Yes, HS code 2921.51 includes both the primary amines and their derivatives, as well as any salts derived from these compounds.