Solidifying-point

Many oils possess the property of becoming solid at temperatures slightly below the ordinary, and a determination of the soliditying- or melting-points becomes an important criterion of purity in these cases. The melting-point is not usually the same as the solidifying-point, on account of the peculiar properties of bodies, included under the term superfusion, etc. In addition, the temperature recorded differs some-... 

Kklte-probe, /. cold test, -punkt, m. (Oils) solidifying point, kalterblasen, a. (Iron) cold-blast. 

As a growth medium, agar has nice properties, such as a high melting point (85°C), and a lower solidifying point (40°C). It can stay... 

In fact, the presence of solid solutions considerably effects the homogeneity of the mixture, preventing the formation of inner cracks and fissures. If the solidifying point of the eutectic is too low (i.e. below 60°C) the explosive may exude from the shell, whereas too high a solidifying point hinders melting, and in turn complicates the process of filling the shell. 

On account of the variability of the proportions of A-sulphur, p,-sulphur and 77-sulphur in the liquid, the solidifying-point of molten sulphur is not constant, but may range from 114° to 117° C. or even more widely. The freezing-point of pure A-sulphur can be determined by calculation, the result, 119-25° C., almost coinciding with the temperature... 

The physical characters of greatest importance in the examination of the volatile oils are, besides appearance and odour specific gravity, rotatory power, refractive index, solidifying point, behaviour on distillation, and solubility see sections 1-7). The components most often requiring estimation are esters, alcohols, aldehydes, ketones, phenols (see sections 8-11), and the most common adulterants to be looked for are alcohol,... 

For the exact determination of the solidifying point of some essential oils use may be made of the apparatus shown in Fig. 62. 

Specific Gravity Solidifying Point Melting Point Saponification Value Iodine Value Reichert Value Hehner Value Thermal Test Heat of Bro-mination Refractive Index ... 

Titer is the solidifying point of the mixed fatty acids derived from a sample of fat. Fat is saponified and subsequently acidulated. The layer of mixed fatty acids is separated, washed, dried, and allowed to cool. As the solids begin to separate, the temperature rises due to the liberation of latent heat. The highest temperature reached is taken as the titer. 

Solvent Molecular weight Solidifying point (°C) Absorption spectrum (A) X max Emission spectrum (A) Relative pulse height... 

Japanese fennel fruits somewhat resemble those of anise in appearance, but are more oblong and do not taper to the apex. Umney Pharm. J. 1896, 57, 91) obtained 2.7 per cent of pale yellow oil with the odour of sweet fennel. The solidifying-point was 7° C., melting-point 10°. When fractionated, the following fractions were obtained below 220°, 26 per cent 220-225°, 32 per cent 225-230°, 34 per cent residue, 8 per cent. According to Umney, this oil probably contains 75 per cent of anethole 10 per cent of fenchone (by reduction and acetylisation), with some pinene and dipentene it is not stated how the last two were identified. 

Properties The solidifying points of the different tallows are as follows from 20-45C for horse fat, 27-38C for beef tallow, 54—56C for stearin and oleo, 32-41C for mutton tallow d 0.86 refr index 46-49 (40C) (Zeiss) iodine value 193-202 flash p 509F (265C). Combustible. 

The separation of the chloronitrobenzenes (about 35 per cent ortho and 65 per cent para) is a tedious and difficult matter. The solidifying points of mixtures of o- and p-chloronitrobenzenes are given in Table 4-13. From this table, it is seen that the eutectic point is 14.65°C, corresponding to a composition of 33.1 per cent of the para and 66.9 per cent of the ortho compound. 

Para, % Solidifying point, OQ Para, % Solidifying point,... 

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