Harmonized System

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Section VI > Chapter 29 > Heading 2934

Explanatory notes

… containing an unfused thiazole ring (whether or not hydrogenated) in the structure 2934.20 - Compounds … the structure a benzothiazole ring-system (whether or not hydrogenated), not further fused 2934.30 - Compounds … Sultones* . These may be considered as internal esters of hydroxysulphonic acids. They include the sulphonephthaleins, … hydro­chloride .         (7) …

Section VI > Chapter 28 > Heading 2841

Explanatory notes

… heading are : (1)   Aluminates . Derivatives of aluminium hydroxide. (a)  Sodium aluminate . Obtained by treating … in potassium hydroxide. White, micro‑crystalline masses, hygroscopic and soluble in water. Same uses as sodium … The treatment of zinc salts with potassium dichromate gives hydrated or basic zinc chromate. Powder, insoluble in water. …

Section VI > Chapter 28 > Heading 2833

Explanatory notes

… (neutral sulphate) (Na 2 SO 4 ). Occurs in the anhydrous or hydrated state as a powder or in large transparent crystals, … astrakhanite) are excluded ( heading 25.30 ). (b) Sodium hydrogen sulphate (acid sulphate) (NaHSO 4 ). This residual …

Section VI > Chapter 29 > Heading 2930

Explanatory notes

… compounds whose molecules contain, in addition to atoms of hydrogen, oxygen or nitrogen, those of metals or other … (including compound derivatives) which, apart from hydrogen, oxygen and nitrogen, only have directly linked to … 2930.60 - 2-(N,N-Diethylamino)ethanethiol 2930.70 - Bis(2-hydroxyethyl)sulfide (thiodiglycol (INN)) 2930 .80 - …

Section VII > Chapter 39 > Heading 3907

Explanatory notes

…              - Other polyethers : 3907.21 - - Bis (polyoxyethylene) methylphosphonate 3907.29 - - Other 3907.30 ‑ Epoxide resins … covers : (1)  Polyacetals . Polymers obtained from an aldehyde, normally formaldehyde, and characterised by the …

Section VII > Chapter 39 > Heading 3909

Explanatory notes

…               ‑ Other amino-resins : 3909.31 ‑ - Poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI) … are formed by the condensation of amines or amides with aldehydes (formaldehyde, furfuraldehyde, etc.). The most … structures below :       Polyamine resins, such as poly(ethyleneamines), are not amino‑resins and fall in …

Section VI > Chapter 38 > Heading 3806

Explanatory notes

… rosin or resin acids in a solution of sodium or potassium hydroxides.  The other inorganic resinates are generally … alcohol, of rosin or resin acids or, of their oxidised, hydrogenated, disproportionated (dehydrogenated) or …

Section VI > Chapter 29 > Heading 2910

Explanatory notes

… nitrated or nitrosated derivatives. 2910.10 - Oxirane (ethylene oxide) 2910.20 - Methyloxirane (propylene oxide) … removed from organic compounds (diols, glycols) having two hydroxyl groups in the molecule, stable internal ethers are … glycol (i.e., ethylene glycol in which one atom of hydrogen has been replaced by a methyl radical (-CH 3 ) is …

Section VI > Chapter 38 > Heading 3824

Explanatory notes

… Note 3 to this Chapter : 3824.81 - - Containing oxirane (ethylene oxide) 3824.82 - - Containing polychlorinated … the dry matter. Products of this kind are obtained by the hydrogenation of glucose syrups having a high disaccharide … . Sorbitol of this kind is usually obtained by the hydrogenation of glucose or invert sugar. (6)   Mixtures of …

Section VI > Chapter 28 > Heading 2830

Explanatory notes

… sub‑Chapter, this heading covers metal sulphides (salts of hydrogen sulphide (H 2 S) of heading 28.11). The old name “sulphydrates” (hydrosulphides) is sometimes applied to the acid sulphides. … sulphide), soluble in water, sulphating in the air, or in hydrated crystals (with 9 H 2 O), colourless or greenish, …