Commercial Phosphorus Trisulfide
Commercial phosphorus trisulfide (P4S3) is a yellow-gray crystalline powder used primarily in the manufacture of safety match heads and as a lubricant additive. It falls under HTS 2813.90.20.00 as a sulfide of phosphorus, specifically the 'other' category for commercial phosphorus trisulfide within the sulfides of nonmetals heading. This classification applies to chemically defined inorganic compounds of nonmetals per Chapter 28 notes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If chemically modified for organic synthesis
If processed into organophosphorus compounds, it shifts to Chapter 29 for organic chemicals.
If mixed with organic stabilizers for retail
Mixtures not purely chemically defined fall under heading 3824 as other chemical preparations.
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Import Tips & Compliance
• Obtain safety data sheets (SDS) and ensure packaging meets UN hazardous materials standards for phosphorus compounds; verify purity to confirm 'chemically defined' status per Chapter 28 Note 1
• Common pitfall: misclassifying as organic due to sulfur content—it's inorganic
Related Products under HTS 2813.90.20.00
Technical Grade P4S3 Powder
Technical grade phosphorus trisulfide (P4S3) powder is an industrial chemical for producing organic phosphorus compounds and as a reducing agent in metallurgy. Classified under HTS 2813.90.20.00 as 'of phosphorus' in the commercial phosphorus trisulfide subheading, it qualifies as a nonmetal sulfide per Chapter 28 exclusions and notes.
Phosphorus Sesquisulfide Flakes
Phosphorus sesquisulfide flakes, synonymous with P4S3, are supplied in flake form for match manufacturing and pyrotechnics. This product is specifically 'of phosphorus' under HTS 2813.90.20.00, distinguishing it from carbon disulfide (2813.10) as a nonmetal sulfide.
Industrial Phosphorus Trisulfide 99% Pure
99% pure industrial phosphorus trisulfide is a high-purity grade for chemical synthesis and lubricant production. It meets HTS 2813.90.20.00 criteria as commercial phosphorus trisulfide 'of phosphorus,' excluded from organo-inorganic compounds per Chapter 28 note 2.
P4S3 Match Production Grade
P4S3 specifically graded for safety match production, providing the controlled ignition properties needed. Classified in HTS 2813.90.20.00 as the 'other' phosphorus sulfide, separate from pure elements or metal salts.
Red Phosphorus Trisulfide Variant
Red amorphous phosphorus trisulfide variant used in specialty lubricants and flame retardants. Falls under HTS 2813.90.20.00 as commercial phosphorus trisulfide of phosphorus, per subheading specificity.
Phosphorus Sulfide P4S3 Drums
Bulk phosphorus sulfide (P4S3) packaged in 25kg drums for industrial distribution. HTS 2813.90.20.00 covers this as 'of phosphorus' commercial grade, not retail packaged.