Harmonized System

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Section VII > Chapter 39 > Heading 3902

Explanatory notes

… This heading covers polymers of all olefins (i.e. acyclic hydrocarbons having one or more double bonds) except ethylene. The important polymers of this heading are … the General Explanatory Note to this Chapter. The general physical properties of polypropylene are similar to those of …

Section VI > Chapter 28 > Heading 2807

Explanatory notes

… or seleniferous products, lead sulphate) by treatment with hydrogen sulphide or ammonium sulphide. Sulphuric acid is a … chemistry (preparation of naphthalenesulphonic acid, hydroxyanthraquinone, thioindigo, alizarin derivatives, … 28.06 and 28.08 , respectively). (b)   Sulphur trioxide, hydrogen sulphide, peroxosulphuric (persulphuric) acids, …

Section VI > Chapter 38 > Heading 3816

Explanatory notes

… of this heading also contain non-refractory binders such as hydraulic binding agents. The heading also covers refractory … or temperature at which the mix will be used, different non-hydraulic binding agents (e.g., tar, pitch, resins) are … concretes consisting of mixtures of heat‑resistant hydraulic cements (e.g., aluminous cements) and refractory …

Section V > Chapter 27 > Heading 2714

Explanatory notes

… solid or very viscous mixtures of naturally occurring hydrocarbons with inert mineral matter, which in the case of … of heading 27.14.  Further, the heading also includes dehydrated and pulverized natural bitumen dispersed in water … This subheading covers sedimentary rock or sand containing hydrocarbons, which can be separated in the form of products …

Section VI > Chapter 38 > Heading 3803

Explanatory notes

… process. When this liquor is poured into settling‑vats, a frothy mass forms on its surface. Crude tall oil is obtained when this frothy mass is heated and acidified, usually with dilute … tall oil by means of an alkali (sodium or potassium hydroxide) ( heading 34.01 ). (b)   Residual liquor from the …

Section VI > Chapter 32 > Heading 3202

Explanatory notes

… cresol- or naphthalenesulphonic acids; sulphonated aromatic hydrocarbons of high molecular weight; polysulphonamides and polyhydroxy-polyarylsulphone-sulphonic acids.       (2)   …

Section VII > Chapter 39 > Heading 3911

Explanatory notes

… resins and polyterpenes 3911.20 ‑ Poly (1,3-phenylene methylphosphonate) 3911.90 ‑ Other This heading covers the …

Section VI > Chapter 38 > Heading 3822

Explanatory notes

… . Diagnostic reagents are used in the evaluation of physical, biophysical or biochemical processes and states in animals and …

Section XVI > Chapter 84 > Heading 8481

Explanatory notes

… 8481.10 ‑ Pressure‑reducing valves 8481.20 ‑ Valves for oleohydraulic or pneumatic transmissions 8481.30 ‑ Check … perform the same function on compressed air, steam, water, hydrocarbons or other fluids.        If combined with a … trap (thermostatically controlled steam traps). (11) Fire‑hydrants (stand pipes), fire cocks, hosepipe nozzles and the …

Section VI > Chapter 34 > Heading 3407

Explanatory notes

… contain 25 % or more by weight of α-calcium sulphate hemihydrate or almost exclusively α-calcium sulphate … does not occur naturally and that can be produced, e.g., by dehydration of gypsum deposits with a high calcium sulphate dihydrate content.        The products are used for taking …