Acetic glacial

Stannous Chloride Dihydrate. A white crystalline soHd, stannous chloride dihydrate is prepared either by treatment of granulated tin with hydrochloric acid followed by evaporation and crystallisation or by reduction of a stannic chloride solution with a cathode or tin metal followed by crystallisation. It is soluble in methanol, ethyl acetate, glacial acetic acid, sodium hydroxide solution, and dilute or concentrated hydrochloric acid. It is soluble in less than its own weight of water, but with much water it forms an insoluble basic salt. 

Mobile phase Toluene — ethyl acetate — glacial acetic acid (90 -f 5 -t- 5). 

Mix 1 ml 2,5-dimethoxytetrahydrofuran with 99 ml glacial acetic acid [1] or ethyl acetate - glacial acetic acid (95 + 5). 

Ethambutol Hydrochloride (+)-2-Amino- Butan-l-ol TLC-Method Adsorbent-Silica Gel-G, Mobile Phase-Ethyl acetate Glacial acetic Acid HC1 H20(11 7 1 1) Apply 2pi of each of two solns. in MeOH, containing (1) 5% w/v of T.S. (2)0.050% w/v of (+)-2-aminobutan-l-ol. Remove TLC plates, dry in air, heat at 105°C for 5 mts, cool, spray with cadmium and Ninhydrin soln.2, heat to 90°C for 5 mts. The spot obtained with (2) is more intense than with (1). NMT 1.0... 

Using numerical taxonomy it was found that the best separations were obtained by chloroform-methanol-(98-100 per cent) formic acid (44.1 3 2.35) and n-hexane-ethyl acetate-glacial acetic acid (31 14 5, v/v) as mobile phases. As the flavonoid profile of the propolis samples showed considerable differences, the method has been proposed for the authenticity test and traceability of various propolis products [141]. 

Composition of mobile phases 1 = toluene-ethyl acetate-(98-100%) formic acid (36 12 5. v/v) 2 = cyclohexane-ethyl acetate-(98-100%) formic acid 3 = toluene-ethyl acetate-glacial acetic acid (36 12 5, v/v) 4 = cyclohexane-ethyl acetate-glacial acetic acid (31 14 5, v/v) 5 = n-hexane-ethyl acetate-(98-100%) formic acid (31 14 5, v/v) 6 = toluene-acetone-(98-100%) formic acid (38 10 5, v/v) 7 = n-hexane-ethyl acetate-glacial acetic acid (31 14 5,v/v) 8 = petroleum ether(40-70°C)-ethyl acetate-(98-100%) formic acid (30 15 5, v/v) 9 = carbon tetrachlo-ride-acetone-(98-100%) formic acid (35 10 5, v/v) 10 n-hexane-ethyl acetate-glacial acetic acid (30 20 1.5. v/v) 11 = chloroform-methanol-(98-100%) formic acid (44.1 3 2.35, v/v). Reprinted with permission from I. Jasprica et al. [141]. 

Nitro-l-dictzo-2-napbtbol [called 4-Nitro-l -diazo-naphthol-(2) or 4-Nitro-naphthochinon (l 2)-diazid-(l) in Get], yel ndLs (from petr eth), mp 130-34° (dec) readily sol in acet, glacial acet acid St benz mod sol in ale si sol in w was prepd by diazotizing 2,4-dinitro-1-n aphthy lamin e (Refs 1, 4 St 6) J-Nitro-l-diazo-2-napbthol, crysts (from diox-ane), mp 160-62°(dec) was obtd when the 2, 7-dinitro-l-naphthylamine diazotized salt was poured into water contg Na acetate (Ref 8) Refs 1) Beil 16, 533 2) Beil 16, (365)... 

The tests to be made are those given under Acid Acetic, Glacial, 96 per cent, observing the conditions there described. 

The tests to be made are those given under Acid Acetic, Glacial, 96 per cent, observing the conditions there described. But instead of 10 gm. of the 96 per cent, use 30 gm. of the 30 per cent. 

C7H2N3F306 mw 281.11 N 14.95% OB to C02 -51.23% white ndls mp 87°, 88.6-91.2°, 88.3—91.0°, 89.5—90° (separate values). Sol in hot trichlorethylene, Prepn is by reacting a soln of Na iodide in acet/glacial acetic acid with a soln of 3-chloro-2,4,6-trinitrobenzotrifluoride in acet at RT with stirring for 24 hrs. The reaction mixt is then drowned in an aq soln of Na sulfite. This procedure serves to separate an oily product-containing layer which is then extracted with hot... 

Trinitroazoxybenzene nearly colorless tablets or prisms (from acet), mp 187-92° readily sol in hot chlf, acet. glacial acetic acid, nitrobenz or hot HN03 diffc sol in ale, eth or ligroin. Its prepn and other props are given in Ref 1... 

When ozonised oxygen is passed through a solution of an ethylenic compound in an inert solvent (e.g. methanol, ethyl acetate, glacial acetic acid, chloroform or hexane) preferably at a low temperature (—20 to — 30 °C), ozone adds on readily and quantitatively to the double bond to give an ozonide (1) ... 

Allow a mixture of 0.5 g of the tertiary amine and 0.5 ml of colourless methyl iodide to stand for 5 minutes. If reaction has not occurred, warm under reflux for 5 minutes on a water bath and then cool in ice-water. The mixture will generally set solid if it does not, wash it with a little dry ether and scratch the sides of the tube with a glass rod. Recrystallise the solid product from absolute ethanol or methanol, ethyl acetate, glacial acetic acid or ethanol-ether. 

Acetate buffer (pH 4.5) 0.2 M sodium acetate, glacial acetic acid. 

With hydrazine hydrochloride, thioindoxyl-1,1-dioxide has been reported to afford the azine (110) by prior formation of a bishydrazone.132 Murexide (111), a purple indicator used in compleximetric titrations, is formed from ammonium acetate, glacial acetic acid, and alloxantin (152 R = H). The murexide test is well known for detecting uric acid and other purines.133... 

A variety of methods has been devised for the confirmation of heptachlor residues (Table II). The presence in the heptachlor molecule (Figure 1) of a reactive allylic chlorine atom has been the basis of three confirmatory tests based on its ease of replacement. Reaction with a silver acetate-glacial acetic acid mixture produced 1-acetoxychlordene which, with the GLC conditions used, had a retention time close to heptachlor epoxide 44). Of the common organochlorine pesticides, only heptachlor reacted quantitatively. Endrin reacts to a small extent with the glacial acetic acid to give a secondary endrin ketone peak. When the reaction of heptachlor with silver salts was extended to silver carbonate in aqueous alcohol, 1-hydroxychlordene was obtained which can easily be converted to the more volatile and GG-responsive silyl ether. Unfortunately, this silyl ether has a Rt identical to aldrin. With silver carbonate, hepta-... 

G butyl acetate-glacial acetic acid-water (35 10 3)... 

Properties Colorless needles. Mp 153C, bp 307C, d 1.212 (15/4C). Slightly soluble in water soluble in alcohol, ether, ethyl acetate, glacial acetic acid. Grade Technical. 

Properties Viscous, hygroscopic liquid. Soluble in water, ethyl acetate, glacial acetic acid insoluble in benzene. 

In Reaction II, the crude carbinol was mixed with a 3-6 fold excess of the substituted benzene and dripped into cold acid mixture, with stirring. A 4 1 ratio of sulfuric (cone.) and acetic (glacial) acids was determined to be optimal for most condensations attempted. The reaction was allowed to warm to room temperature after 1 h, and it was then poured over ice. Following extraction with diethyl ether, washing with NaHC03, drying with anhydrous Na2S04, filtration, and rotary evaporation, the product was purified and characterized before further use. 

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