Tartar yellow

T FOOD YELLOW 4 FOOD YELLOW 5 FOOD YELLOW NO. 4 HD TARTRAZINE HD TARTRAZINE SUPRA HEXACERT YELLOW NO. 5 HEXACOL TARTRAZINE HIDAZID TARTRAZINE HISPACID FAST YELLOW T HYDRAZINE YELLOW HYDROXINE YELLOW L K.AKO TARTRAZINE KAYAKU FOOD COLOUR YELLOW NO. 4 KAYAKU TARTRAZINE KCA FOODCOL TARTRAZINE PF KCA TARTRAZINE PF KITON YELLOW T LAKE YELLOW LEMON YELLOW A LEMON YELLOW A GEIGY L-GELB 2 MAPLE TARTRAZOL YELLOW MITSUI TARTRAZINE NAPHTOCARD YELLOW O NEKLACID YELLOW T OXANAL YELLOW T SAN-EI TARTRAZINE SCHULTZ NO. 737 SUGAI TARTRAZINE TARTAR YELLOW FS TARTAR YELLOW N TARTAR YELLOW PF TARTAR YELLOW S TARTRAN YELLOW TARTRAPHENINE... 

BUCACID TARTRAZINE D C YELLOW NO. 5 DOLKWAL TARTRAZINE EGG YELLOW A EUROCERT TARTRAZINE FOOD YELLOW NO. 4 HEXACOL TARTRAZINE HYDRAZINE YELLOW KARO TARTRAZINE LAKE YELLOW MAPLE TARTRAZOL YELLOW TARTAR YELLOW TARTRAZINE TARTRAZOL YELLOW TRISODIUM-3-CARBOXY-5-HYDROXY-l-p-SULFOPHENYL-4-p-SULFOPHENYLAZOPYRAZOLE VONDACID TARTRAZINE WOOL YELLOW YELLOW LAKE 69... 

Estimation of Chloride by the Tartrazol Method.—Transfer by means of a pipette 10 ml. of N/10 AgNOj to a 100 ml. measuring cylinder. Acidify with 5 drops of concentrated HNO3. Add 2-4 drops of 0-5 per cent, tartrazine (tartrazol, or tartar yellow ). Titrate with the urine, or other chloride solution, from a burette, by additions of 0-2 ml. at a time. Shake the yellow mixture vigorously... 

Take two test-tubes A and B in A place about 5 ml. of neutralised tartaric acid solution and in B place 5 ml. of distilled water. To each solution add 3-4 drops of ferric chloride solution. Place a piece of white paper under the tubes, look down their length and note that A is definitely yellow compared with the control tube B. This yellow colour is given by a-hydroxy-carboxylic-acids, lactic acid, tartaric acid, citric acid. 

Even before heating all the acids rapidly appeared as blue zones on a yellow-blue background. After heating tartaric acid QiRf 2—5) and maUc acid hRf 5 — 10) retained their color while lactic acid hRf 30 — 35), succinic acid hRf 35—40), pimelic acid hRf 50), maleic acid hRf 55), suberic acid hRf 55 — 60), benzoic acid hRf 80 — 85), stearic acid hRf 85 — 90) and arachidic acid hRf 85—90) appeared as pale yellow zones on a blue-yellow background (Fig. 1). The detection limits lay at 1 to 2 pg substance per chromatogram zone. 

In 1884, H.J. Ziegler first used pyrazolones as coupling components. In an attempt to find a new dye by synthesizing a colored osazone from phenyl hydrazine-4-sulfonic acid and dioxo tartaric acid, he obtained yellow tartrazine by condensation ... 

Salts have been prepared with optically active camphor sulphonic acids. These also are yellow crystalline bodies, but no resolution of the base has been effected. d-Camphoric acid, d-tartaric acid, and d-nitro-camphor compounds were also prepared, and again no resolution was effected. Hence it is concluded that the hydroxo- and nitroso-groups are probably in the 1-, 0-, or trans-position. 

There are, however, certain chemical reactions by which platinum may be readily distinguished and separated from the gold in solution. Sulphate of iron and oxalic acid, which precipitate gold, do not precipitate platinum. When the latter is dissolved in aqua regia, and the acid neutralized by carbonate of soda, it is deposited as a black powder, if the mixture be boiled with tartaric acid and sodar—the ingredients of a Seid-litz powder. Further, the addition of chloride of ammonium and alcohol te a strong solution of platinum, causes the deposition of a yellow crystalline precipitate, which is charactsristtc of this metal. These and other reactions may be summarily stated as follows... 

The evidence for the formation of complex heteropoly-acids with tantalic acid is very comparable to that set forth in the case of niobic acid (see p. 165). Solutions of tantalates are readily hydrolysed in aqueous solution by boiling, and even more readily by the addition of mineral acids, acetic acid or succinic acid in the presence, however, of arsenious add, arsenic add, tartaric add or dtric add no precipitation of tantalic add takes place. Again, tincture of galls yields a yellow predpitate with solutions of tantalates which have been rendered feebly acid with sulphuric add this reaction does not, however, take place in the presence of ordinary tartaric add, racemic add or citric acid. Tartaric add also prevents the formation of the predpitates which are thrown down on the addition of potassium ferrocyanide or potassium ferricyanide to faintly acid solutions of tantalates, and hinders the precipitation of tantalic add from solutions in inorganic acids by the action of ammonia. In all these cases it is assumed that complex acids or their salts are produced, in consequence of which the usual reaction does not take place. 

A solution of 0.2g-0/3g of potassium antimonyl tartrate (tartar emetic) in 100ml of water Is treated with hydrogen sulfide for a short time An orange-yellow sol is formed which is dialysed in running water for 2-4 days ... 

Yield.-—Up to 175 gms. Dyes cotton mordanted with tannin or tartar emetic a pure yellow. (B., 33, 318.)... 

Brass yellow prismatic needlos soluble in hot water to a bluish-green solution dyes silk, wool, jute and leather, a bluish-green directly, and cotton which has been previously mordanted with tannin and tartar emetic. 

Sodium hexanitrocobaltate (III) (Na3[Co(N02)6]) Tartaric acid solution (sodium acetate buffered) Yellow precipitate of potassium hexanitrocobaltate (III) insoluble in acetic acid White precipitate of potassium hydrogen tartrate... 

A mixture of 61 grams l-phenyl-l-oxo-2-(N-methyl-N-ethanolamino)-propane hydrochloride and 100 cc 98-100% formic acid was refluxed at the boiling point at atmospheric pressure for 45 minutes on an oil bath. Thereafter, the oil bath temperature was increased to 180°C and as much of the excess unreacted formic acid as possible was distilled off. A vigorous evolution of carbon dioxide developed during the distillation, which ceased after approximately 45 additional minutes. The honey-yellow syrup which remained as the distillation residue was worked up by admixing it with about six volumes of water and adjusting the aqueous mixture to alkaline reaction with concentrated sodium hydroxide. An oily phase separated out which was extracted with ether. The ether extract was washed with water and dried over potassium carbonate. The solvent was distilled off and the distillation residue was fractionally distilled in vacuo. The base boils at 132°-133°C at 12 mm. The yield was 93% of theory. Reaction with tartaric acid gave the final product. 

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