2520 10 — Gypsum; anhydrite

2520 Gypsum; anhydrite; gypsum binders (representing calcined gypsum or calcium sulfate), okre achenic or unpainted, containing or not containing small amounts of accelerators or moderators: 2520 10 gypsum; anhydrite 2520 20 gypsum binder gypsum is a natural hydrated calcium sulfate, usually white and crumbling.

Anhydrite is a natural anhydrous calcium sulfate used in the production of sulfuric acid or certain types of gypsum binders. Gypsum binders are gypsum, partially or completely dehydrated by calcination. A feature of gypsum is that during calcination it loses part of its odes, forming plaster binders, which harden when mixed with water. In order that the gypsum binders do not grasp too quickly, small amounts of moderators are often added to the calcined gypsum. For special purposes, gypsum is calcified until all water is lost, and a small amount of spruces such as alum (Kina cement or English cement) are added. Similar gypso binders are made by adding alum to natural anhydrite. All these prepared plaster binders are classified in this heading. This heading also includes: (1) Gypsum binders, brought to grinded into flour consistence, for use in processing fabrics or coating paper. (2) Gypsum binders containing additionally added coloring substance. (3) Gypsum binders that have been specially calcified or finely ground for use in filling and teeth, containing or not containing small amounts will slow down firs or accelerators. This heading does not cover plaster-based formulations for dental purposes (heading 3407).

Notes

Machine translation. The original is the Russian text of the EAEU tariff, and customs goes by it; this translation is for understanding only and has no legal force.

1. Unless otherwise specified in the context of or in note 4 to this chapter, this chapter includes only products raw or washed (including with chemicals that remove impurities without changing the structure of the product), crushed, ground, powdered, sifted, enriched by flotation, magnetic separation or other mechanical or physical processes (except crystallization). Products which have been roasted, calcined, mixed or processed by methods not specified in each heading are not included in this chapter.

Products of this group may contain additives of dust suppressant, provided that this does not alter the properties of the product, making it suitable for specific rather than conventional use.

2. This group does not include:

(a) freeze-dried, precipitated or colloidal sulfur (heading 2802);

(b) mineral dyes containing 70 % or more by weight of chemically bound iron in terms of Fe2O3 (heading 2821);

(c) medicinal products or other products of Chapter 30;

(d) perfumes, cosmetics or toiletries (Chapter 33);

(e) dolomite padding mixture (heading 3816);

(f) paving stones, curbstones or paving boards (heading 6801); mosaic cubes or similar articles (heading 6802); slate for roofing, cladding or waterproofing (heading 6803);

(g) precious or semi-precious stones (heading 7102 or 7103);

(h) crystals of sodium chloride or magnesium oxide, artificially grown (other than optical elements), each weighing not less than 2.5 g (heading 3824); optical elements of sodium chloride or magnesium oxide (heading 9001);

(ij) billiard crayons (heading 9504); or

(k) pencils for writing or drawing, pencils for tailors (heading 9609).

3. Any products which may be classified either in heading 2517 or in any other heading of this Chapter shall be classified in heading 2517.

4. Heading 2530 covers, inter alia: vermiculite, perlite and chlorites, unfoamed; natural pigments, whether or not calcified, mixed or unmixed; natural mica oxide of iron; sepiolite (in polished or unpolished pieces); amber; sepiolite agglomerated and amber agglomerated, in plates, rods, sticks, or similar forms, not processed after casting; gagatron (black yanthronate), or with brontrontrontone; or with ambertrontrontone.