Plaster of Paris Powder
Plaster of Paris powder is the classic beta-hemihydrate calcined gypsum used universally for casts, molds, and sculptures. HTS 2520.20.00.00 covers this pure form without added retarders or accelerators beyond trace amounts. Essential material for hospitals, artists, and DIY crafters worldwide.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sterile-packed for surgical use
Sterile plaster-of-Paris bandages for medical splinting become pharmaceutical preparations.
If pre-blended with molding accelerators
Commercially modified plasters for specific trades become Chapter 32 trade preparations.
If impregnated onto orthopedic bandages
Plaster-impregnated bandages constitute finished medical appliances under Chapter 90.
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Import Tips & Compliance
• Request purity certificate showing >95% calcium sulfate hemihydrate content
• Avoid 'medical grade' labeling unless meeting pharmaceutical standards to prevent Chapter 30 classification
• Confirm particle size distribution suitable for intended use; ultrafine grades may face different scrutiny
Related Products under HTS 2520.20.00.00
Calcined Gypsum Plaster
Calcined gypsum plaster, also known as plaster of Paris, is produced by heating gypsum to remove water, resulting in a fine powder that forms a paste when mixed with water. It falls under HTS 2520.20.00.00 as it consists of calcined gypsum used primarily for construction and molding applications. This product may include small quantities of accelerators or retarders for controlled setting times.
White Architectural Plaster
White architectural plaster is a calcined gypsum product designed for interior wall finishing and decorative molding in buildings. Classified under HTS 2520.20.00.00 due to its composition of calcined gypsum with minimal accelerators for smooth application and setting. It provides a base for paint and creates ornamental cornices and ceiling roses.
Dental Plaster Type III
Dental plaster Type III is a high-strength calcined gypsum formulation used for creating accurate dental models and casts. It meets HTS 2520.20.00.00 criteria as calcined gypsum with controlled accelerators for dental laboratory applications. The fine grain size ensures precise reproduction of tooth structures.
Colored Modeling Plaster
Colored modeling plaster contains calcined gypsum with pigments for sculpting, casting, and educational craft projects. It qualifies for HTS 2520.20.00.00 as the pigments represent coloring only, with gypsum as principal component. Popular in art classrooms and hobbyist workshops for non-firing plaster sculptures.
Setting-Type Joint Compound Base
Setting-type joint compound base is calcined gypsum plaster used as the primary ingredient in drywall finishing compounds. Under HTS 2520.20.00.00 when imported as bulk powder before mixing with fillers and polymers. Provides the chemical setting action essential for professional drywall installations.
High-Strength Gypsum Plaster
High-strength gypsum plaster uses specially calcined gypsum with accelerators for applications requiring superior compressive strength, such as precision tooling and patterns. Classified in HTS 2520.20.00.00 as it remains primarily calcined calcium sulfate. Used in foundries for match plate patterns and engineering models.