Commercial Mass Determination in Regenerated Cellulosic and Synthetic Mixtures
Commercial mass determination reconciles clean dry polymer mass with official regain allowances to secure precise customs compliance and financial settlement.
HS Heading 5509
Tariff Classification
International customs nomenclature allocates a specific six-digit code to spun yarns made of synthetic staple fibers that are not put up for retail sale. The category defined by hs heading 5509 covers yarn composed of polyester, acrylic, or modacrylic staple fibers. This classification system excludes filament yarns and yarns made of natural fibers.
Yarn Composition
Yarn under this code must contain at least eighty-five percent by weight of synthetic staple fibers, either single or multiple. The hs heading 5509 covers blends where synthetic fibers are mixed with cotton, wool, or artificial fibers like viscose. This code is broken down into subheadings based on whether the yarn is mixed with wool or cotton, and whether it is single or multiple yarn.
These details are verified by laboratory tests that measure the fiber composition.
Regulatory Duty
Garment factories and yarn merchants use this code to determine the appropriate tariffs and import regulations for their raw materials. An incorrect classification under hs heading 5509 can lead to customs audits or the loss of preferential trade status under regional agreements. This tariff code must match the description on the commercial invoice and bill of lading.
This matching is required for all international shipments of spun synthetic yarn.
Compliance Check
Customs inspectors draw random samples from shipments to verify that the fibers are staple rather than filament. This test ensures that the shipment matches the declaration and is classified correctly.