Hygroscopic character

For this purpose the potassium salt K2Cr20v is preferred since it lacks the hygroscopic character of the sodium salt and may therefore be used as a primary standard. 

If the substrate contains additional double bonds, bi- or even tri-cyclic products can be obtained [149]. Furthermore, Echavarren et al. synthesized several gold(I) cationic derivatives to avoid having to use silver salts that could lead to unwanted side reactions [150] or the hygroscopic character of AuCl3 [151]. 

This relatively unexplored class of iodanes is obtained by either (diacetoxyio-do)benzene or iodosylbenzene and a nitrogen heterocycle, such as substituted pyridines, quinoline or 1 -methylimidazole, in presence of trimethylsilyl triflate (Scheme 23) [68]. Very dry conditions were required because of the highly hygroscopic character of the products, not permitting the determination of their melting points. 

Sucrose, like other simple carbohydrates, is used as additive in mineral suspensions, concrete, and ceramics. The hygroscopic character of the carbohydrates and their ability to interact with colloidal inorganic particles and ions modifies the hydration phenomena within the suspensions, and consequently on the rheology of the medium and the kinetics (most often slowing down) of the... 

A complete X-ray diffraction study of this imino acid has been prevented as a result of its strongly hygroscopic character. However, Mathieson and... 

D.E. type has advantages due to its humectant properties and extra sweetness. Up to 25% of the total sweetener may also be in the form of refined corn sugar, which promotes sweetness, and reduces viscosity of the batch, enabling faster moisture evaporation and prolonging shelf life because of its hygroscopic character. However, a high ratio of dextrose to sucrose may cause graining in the piece due to the relatively low solubility of the former (10). The introduction of corn sirup has revolutionized the commercial production of gum work. 

Polystyrene filters (Microsorban-Sartorius) are characterized by a high efficiency of capturing particles below 1 /im, low filtration resistance and a fairly low content of impurities. Their disadvantage lies in their hygroscopic character. 

Richard Hale uses the following solvent —Amyl-acetate, 4 volumes petroleum naphtha, 4 volumes methyl-alcohol, 2 volumes pyroxyline, 4 to 5 ounces to the gallon of solvent. Hale used petroleum naphtha to hasten the drying qualities of the varnish, so that it would set on the article to be varnished before it had a chance to mn off. It is, however, the non-hygroscopic character of the solvent that makes the varnish successful. This formula is very largely used for the production of pyroxyline varnish, which is used for varnishing pens, pencils, c., also brass-work and silver-ware. 

Cellulose filters (Whatman 41, Whatman, USA) were selected for this study because of their low intrinsic metal content and hygroscopic character (Dams et al. 1972). These filters are widely used in a range of applications including filtering of solutions and airborne particulate matter collection. The cellulose filters used for this work have a dimension of 20 x 25 cm 2 x 1 cm sections were cut using stainless steel scissors to fit in the sample cell of the LA system. 

This has obvious disadvantages. The water removed in this way would, if kept, have helped to reduce flammability as well as increase the specific surface area, thus increasing the hygroscopic character and the oil absorption, and it would also have moderated the adverse effect on polymer viscosity. The practical significance is that ATH can be used in environmentally-friendly, halogen-free printed circuit boards, achieving a UL-94 V-0 fire rating. 

---