About HS Code 290436
This HS code covers perfluorooctane sulphonyl fluoride (PFOSF), a key precursor in the production of perfluorooctane sulfonic acid (PFOS) and related substances. PFOS and its derivatives are part of the broader group of "forever chemicals" (PFAS), known for their exceptional water and oil repellency, heat resistance, and chemical stability. PFOSF was historically used to manufacture surface treatment agents for textiles, paper, and leather, as well as in fire-fighting foams and electroplating. Due to its persistence, bioaccumulation, and toxicity, PFOSF and PFOS are now largely restricted globally under the Stockholm Convention. International trade is severely limited, primarily for allowed specific exemptions or for research purposes, moving from specialized chemical producers to industries with very specific, regulated needs.
Products Under This Code
Perfluorooctane sulfonyl fluoride, PFOSF, Nonafluorobutane-1-sulfonyl fluoride (related, but PFOSF is C8), Perfluorooctanesulfonyl fluoride
Real World Examples
3M Scotchgard (historical precursor), DuPont Zonyl (historical precursor), Daikin PFOSF (historical)
Common Misclassification
This code is very specific to PFOSF. It must be carefully distinguished from other perfluorinated compounds (PFCs) or other sulphonated derivatives (2904.3X), especially other PFAS chemicals like PFOA (often under 2915.90 or 2918.99 if carboxylic acid).
Products Classified Under 2904.36
Industry
This code belongs to the Chemicals industry.
Trade Overview
Trade is highly restricted globally, with limited movements for specific exempted uses, primarily involving specialized chemical manufacturers in countries like China and the USA.
Frequently Asked Questions
What is HS code 290436?
HS code 290436 covers: Derivatives of hydrocarbons; perfluorooctane sulphonyl fluoride, whether or not halogenated. This HS code covers perfluorooctane sulphonyl fluoride (PFOSF), a key precursor in the production of perfluorooctane sulfonic acid (PFOS) and related substances. PFOS and its derivatives are part of the broader group of "forever chemicals" (PFAS), known for their exceptional water and oil repellency, heat resistance, and chemical stability. PFOSF was historically used to manufacture surface treatment agents for textiles, paper, and leather, as well as in fire-fighting foams and electroplating. Due to its persistence, bioaccumulation, and toxicity, PFOSF and PFOS are now largely restricted globally under the Stockholm Convention. International trade is severely limited, primarily for allowed specific exemptions or for research purposes, moving from specialized chemical producers to industries with very specific, regulated needs.
What products fall under HS code 290436?
Perfluorooctane sulfonyl fluoride, PFOSF, Nonafluorobutane-1-sulfonyl fluoride (related, but PFOSF is C8), Perfluorooctanesulfonyl fluoride
What are common misclassifications for HS code 290436?
This code is very specific to PFOSF. It must be carefully distinguished from other perfluorinated compounds (PFCs) or other sulphonated derivatives (2904.3X), especially other PFAS chemicals like PFOA (often under 2915.90 or 2918.99 if carboxylic acid).
How is HS code 290436 structured?
HS code 290436 is a 6-digit subheading under the Harmonized System. The first 2 digits (29) identify the chapter, digits 3-4 (04) identify the heading, and digits 5-6 (36) specify the subheading. This code is standardized globally by the World Customs Organization.