Melting point decomposition

Preparation of S-Acetylsulfanilamido-S-Methy/isoxazole 0.9 gram of 3-amino-5-methyl-isoxazole in 5 cc of pyridine was allowed to react with 2.0 grams of acetylsulfanil chloride accompanied by the generation of heat. After about one hour, water was added to the reaction mixture and the crystal precipitated out was recrystallized from alcohol to give 2.5 grams of 3-acetylsulfanilamido-5-methylisoxazole, melting point (decomposition) 220° to 221°C. 

M molecular mass, p gravimetric density, melting point, decomposition temperature, X gravimetric hydrogen density... 

High molecular weight often results in an increase in thermal stability, probably from the increase in melting point - decomposition is much more rapid in a melt than in the solid phase. 2,2, 2",4,4, 4",6,6, 6"-Nonanitro-m-terphenyl (NONA) (158) is synthesized from the Ullman... 

The kind of information desired proceeds from the qualitative — congruent melting point or decomposition products to the quantitative — melting points, decomposition pressures, and rates of decomposition, i.e., thermodynamics and kinetics. 

The salt is very hygroscopic, but can be prepared by vacuum treatment of its pyridine adduct.41 At the melting point, decomposition is slow, but becomes more rapid above 300°C. Decomposition goes to both the chloride and to the oxide 42... 

Chemical formula Molecular weight Boiling point Melting point Decomposition point Flash point... 

The white crystalline solid has no clear melting point. Decomposition begins at approximately 170°, but sublimation may be accomplished at 190° under reduced pressure with some loss of material. It is soluble in ethers and slightly so in aromatic hydrocarbons. The substance rapidly decomposes with the slightest exposure to either HeO or Oe- Diindenylmagnesium crystallizes in the orthorhombic space group P2i2i2i with lattice Constantsa = 21.494(9), b = 12.375(5), c = 10.394(4) A, and pcaicd = 1.23 cm 3 for 8 molecules per unit cell. 

Melting point decomposition occurs within 30 minutes at 260 C. See Section 11. 

Freezing point depression 0.14°C (1% w/v aqueous solution) Melting point decomposition at 252°C for the dihydrate. Refractive index 1.33 (1% w/v aqueous solution)... 

A significant part of the physical and chemical property analyses is being carried out with x-ray diffraction and x-ray spectrographic equipment and thermal analysis techniques. Thermal analyses have been used to determine melting point, decomposition temperature, and sinterability of waste sludge from APCS operations (Figure 6). These properties are needed to determine applications of the material. 

Melting point (decomposition)—136-140°C (corrected). Loss of weight on drying—not more than 0.2%,... 

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