Ammonia-Acetic acid

Acetylene, fulminic acid (produced in ethanol - nitric acid mixtures), ammonia Acetic acid, acetone, alcohol, aniline, chromic acid, hydrocyanic acid, hydrogen sulphide, flammable liquids, flammable gases, or nitratable substances, paper, cardboard or rags Inorganic bases, amines Silver, mercury... 

Benzylmercaptopropionyl-L-tyrosyl-L-phenyalanyl-L-glutaminyl-L-asparaginyl-S-benzyl-L-cysteinyl-L-prolyl-N-tosyl-D-arginyl glycinamide Sodium Ammonia Acetic acid... 

Oxygen Ammonia Acetic acid Hydrogen bromide... 

In contrast to the low stereoselections realized in the above syntheses utilizing imines of various chiral aldehydes79-8 1, an almost complete stereoselectivity is reported for the Ugi reaction of 2,3 4,5-bis-O-isopropylidenearabinose with ammonia, acetic acid and cyclohexyl isocyanide giving the 2-acetamino-2-deoxyglueono amides as the exclusive products84. 

Lead azide is insoluble in an aqueous solution of ammonia. Acetic acid causes its decomposition but it is soluble in water and concentrated solutions of sodium nitrate, sodium acetate or ammonium acetate. There are fairly big differences of solubility, depending on temperature. 

Other chemicals present in acrylonitrile production or in other non-acrylonitrile operations on sites of the companies in the epidemiological study by Blair et al. (1998) include acetylene, hydrogen cyanide, propylene, ammonia, acetic acid, phosphoric acid, lactonitrile, hydroquinone, sodium hydroxide, sulfuric acid, acrylamide, acetone cyanohydrin, melamine, methyl methaciydate, zweto-methylstyrene, urea, methacrylonitrile, butadiene, ammonium hydroxide and ammonium sulfate (Zey et al., 1989, 1990a,b Zey McCammon, 1990). 

Volatile buffers were reconsidered for the modified method. Triethylamine was ruled out primarily because it could not be obtained in high purity and because the secondary and primary amines contaminating it could potentially react with solutes present in the water sample. Preliminary evidence of reaction between ethidium bromide and triethylammonium bicarbonate was obtained, but the reaction product was not characterized. The components of volatile buffers that appeared acceptable on the basis of chemical purity were ammonia, acetic acid, and formic acid. A few exploratory experiments were conducted involving the elution by ammonium formate and ammonium acetate of EB or quinaldic acid exchanged onto AG MP-50 or IRA 900. These experiments showed that 1 M ammonium formate in water was a very poor eluent, but that EB could be eluted from AG MP-50 with 1 M ammonium formate in methanol. Elution was essentially complete with 6 bed volumes of the methanolic eluent, whereas neither methanol alone nor aqueous 1 M ammonium formate was able to elute this solute. This situation pointed out the necessity for a counterion to displace exchanged solutes and, additionally, indicated that the displaced solute be highly soluble in the eluting solvent. 

The amount of ammonia, acetic acid, naphtha, paraffin, and oils, obtained in the same way, and expressed... 

TADLE HEPBESaNTINO THE FEB OENTABE OF AMMONIA, ACETIC ACID, NAPHTHA, FABAFF1N, AND OILS, OBTAINED BY... 

If dissolved in ammonia, acetic acid will behave as a strong add and be leveled to NH4 and CH-jCOCT (cf. Eq. 10. II note equflibnum lying at about 4.7 on the scale in Fig. 10.1). The different behavior of acetic acid as a base (sulfuric acid), a strong add (ammonia), or a weak acid (water) depends upon the acidity or basicity of the solvent. 

Chlorophenyl)-4-cyanomethylthiazole Hydrochloric acid Ammonia Acetic acid... 

We see that in this instance water acts like an acid, and that, therefore, it is able to split off protons as well as to take them up. This amphoteric nature characterizes a number of other solvents such as alcohol, ammonia, acetic acid, formic acid, pyridine, aniline, and sulfuric acid. The dual nature of water may be described as follows ... 

Indicator papers serve the same purpose as do indicator solutions in that they reveal the reaction of a liquid. As we shall see farther on, the sensitivity of the papers depends on so many conditions that as a rule they do not permit a very precise measurement of the hydrogen ion concentration. It is true that the pH of buffer mixtures can be measured approximately with indicator papers. They may be employed to greater advantage, however, for qualitative purposes such as the testing of gases for acidic or basic constituents (ammonia, acetic acid, etc.). 

This concept serves well in protonic solvents like water, ammonia, acetic acid etc. but fails in case of some obvious acid-base reactions e.g. it can not explain how acidic oxides such as an hydrous carbon dioxide, sulpher dioxide, sulphur trioxide etc. neutralize basic-oxides like calcium oxide and barrium oxide even in the absence of solvent. 

Fig. 4.5.7. An example of medium pressure rapid ion exchange chromatography of 16 mg of a protein mixture (left-hand figure) and of 18 mg of a mixture containing protein fragments (right-hand chromatogram) on 20x0.8 cm columns of CM-Spheron 20-40 /im (37). Buffers A, 0.01 ammonia and acetic acid (pH 7) B, 0.1 M ammonia + acetic acid (pH 7) C, O.S M buffer of the same composition was 1 M in NaCl D, 2 M NaCI. The sequence of protein peaks corresponds to their isoelectric points pi. Cyanogen bromine fragments of human serum albumin CB4 and CB3 contain 31 and 185 amino acids.

Organic buffer systems with decreased polarity are mainly used for the separation of amino acids, peptides and nucleotides. Pyridine, ammonia, acetic acid, formic... 

Note In these examples, the substrate undergoes cyclization by loss of water, an alcohol, ammonia, acetic acid, or the like. 

Sulphuric acid Hydrochloric acid Nitric acid Caustic soda Sodium carbonate Sodium sulphate Copper sulphate Carbon disulphide Aluminium sulphate Oxygen (10,000m ) Hydrogen peroxide Citric acid Tannin extract Lead oxides (red lead, etc.) Zinc oxide Superphosphate Ammonium sulphate Calcium cyanamide Calcium carbide Ammonia Acetic acid... 

Nonsolvents Hydrocarbons (aliphatic and aromatic) petroleum products, hydraulic fluids, water-glycol, aqueous ammonia, acetic acid, and the like (6)... 

Kloetz, G. (1965). Das Korrosionsverhalten von Cadmium- und Zinkuberziigen bei Einwirkung von Ammoniak, Essigsaure, Phenol und Formaldehyd (Corrosion behavior of cadmium and zinc coatings as affected by ammonia, acetic acid, phenol and formaldehyde). Galvanotechnik, 56(9), 514-532 (in German). 

Sodium/liq. ammonia/acetic acid Aldehydes from carboxylic acid amides... 

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