Harmonized System

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Section VI > Chapter 28 > Heading 2836

Explanatory notes

… carbonate containing ammonium carbamate. 2836.20 ‑ Disodium carbonate 2836.30 ‑ Sodium hydrogencarbonate (sodium … heading) occurs in white crystalline masses or in powder, soluble in hot water. It deteriorates in a humid atmosphere …

Section VI > Chapter 28 > Heading 2832

Explanatory notes

… 28.32 ‑ Sulphites; thiosulphates. 2832.10 ‑ Sodium sulphites 2832.20 ‑ Other sulphites 2832.30 ‑ … sulphurous acid (H 2 SO 3 ) (which exists only in aqueous solution and corresponds to the sulphur dioxide of heading …

Section VI > Chapter 28 > Heading 2811

Explanatory notes

… treatment with potassium carbonate or by distillation (it sometimes contains small quantities of silicates and of … atmosphere. In the anhydrous state and in concentrated solution (hydrofluoric acid) it burns deeply into the skin … acid (fluorosilicic acid) (H 2 SiF 6 ), e.g., in aqueous solutions obtained as by‑products in the manufacture of …

Section VI > Chapter 28 > Heading 2827

Explanatory notes

… ‑ Bromides and bromide oxides : 2827.51 ‑ ‑ Bromides of sodium or of potassium 2827.59 ‑ ‑ Other 2827.60 ‑ Iodides … by sublimation. Colourless when pure, otherwise yellowish; soluble in water. Its uses include the pickling of metals, … or glues, in electroplating, in photography (fixing solutions), etc.        See Explanatory Note to heading …

Section XVIII > Chapter 90 > Heading 9018

Explanatory notes

… parameters) : 9018.11 - - Electro‑cardiographs 9018.12 - - Ultrasonic scanning apparatus 9018.13 - - Magnetic resonance imaging apparatus 9018.14 - - Scintigraphic … (4)   Surgical knives and scalpels of all kinds. (5)   Sounds (prostatic, bladder, urethral, etc.). (6)   Specula …

Section VI > Chapter 28 > Heading 2843

Explanatory notes

… remain classified in this heading when put up in colloidal solutions containing protective colloids (such as gelatin, … Disilver oxide (Ag 2 O) is a brownish‑black powder slightly soluble in water, turning black on exposure to light.       … of indelible ink; and as an antiseptic or a parasiticide. Sometimes called “lunar caustic”, though this name is also …

Section VI > Chapter 28 > Heading 2826

Explanatory notes

… or by the ammonium ion (NH 4 + ). In the liquid state or in solution, they are electrolytes giving a metal (or a metal … excludes , inter alia : (a) Salts of Chapter 25 (e.g., sodium chloride). (b) Salts constituting ores or other …

Section VI > Chapter 29 > Heading 2939

Explanatory notes

… organic bases; they have a strong physiological action. Some are obtained by synthesis. They are all more or less … alkaloids obtained from parts of the poppy plant ( Papaver somniferum ) by extraction, followed by purification, and …

Section VI > Chapter 28 > Heading 2834

Explanatory notes

… metal salts of nitrous acid (HNO 2 ) (heading 28.11). (1)   Sodium nitrite (NaNO 2 ). Obtained by reducing sodium … of litharge. Colourless crystals, hygroscopic and very soluble in water. Used as an oxidising agent in vat dyes; in …

Section VI > Chapter 29 > Heading 2907

Explanatory notes

… - - Phenol (hydroxybenzene) and its salts 2907.12 - - Cresols and their salts 2907.13 - - Octylphenol, nonylphenol and their isomers; salts thereof 2907.15 - - Naphthols and their salts … which turn reddish when exposed to light, or may be in solution. It is an antiseptic product used in pharmacy. It …

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