Color instability

Odor and color instability was traced to the choice of SAI. The original Monsavon composition used an SAI blend made from 80% coconut fatty acid and 20% tallow fatty acid. A characteristic alkyl chain length distribution for the resulting SAI is shown in Table 9.4-1. 

Color instability can be caused by many factors, such as the degradation of color additives or of another formula component through chemical interaction with formula components, with trace contaminants of components, or by ultraviolet radiation. This section is concerned with the latter problem involving stabilization of the system to light radiation. 

Callemien D, Collin S (2007) Involvement of flavanoids in beer color instability during storage. J Agric Food Chem 55 9066-9073... 

The color instability of some kerosenes has at times been a mysterious difficulty. Several inhibitors and tests for color instability have been developed. The properties of a few kerosenes and related products are given in Table 3-17. Range oil has no close specifications and is usually considered as an off-brand kerosene that is too high in sulfur, has a bad odor, etc. 

Following certain refining processes like catalytic cracking, sizeable amounts of nitrogen can appear in light cuts and cause quality problems such as instability in storage, brown color, and gums. 

Minols are gray in color, have densities ranging between 1.62 and 1.74g/cc, and are cast loaded. They resemble Torpex in explosive properties, but are less brisant. They exhibit dimensional instability when exposed to thermal cycling during long term storage... 

Although chlorophyll and chlorophyllin colorants seem to be easily obtained, in practice their production as natural food colorants is rather difficult. The sensitivity of chlorophylls to certain enzymes, heat, and low pH, and their low tinctorial strength greatly limit their manufacture and application as food additives, principally when the pigments are isolated from the protective environment of the chloroplasts. The well-known instability of chlorophylls prompted extensive research for developing... 

Although leuco quinones have been studied as color formers, their use in color-forming recording media has not been studied extensively due to their instability. 

A report by Ozin et al. in 1977 describes the formation of Ti(CO)6 via matrix cocondensation techniques (11). This green complex, while not isolated, was characterized by its infrared and ultraviolet-visible spectra. In a pure CO matrix, a color change from green to reddish-brown was observed on warming from 10 K to about 40-50 K. The infrared spectrum of the reddish-brown material showed no evidence for coordinated CO, thus suggesting the extreme thermal instability of Ti(CO)6. 

Nalidixic acid and sodium nalidixate form a strong colored complex with iron III. The maximum of absorbance of the complex is 410 nm and Beer s Law is obeyed from 10 to 250 yg of nalidixic acid per ml(33)5 and from 0.43 to 17.05 mg iron III per ml.(34) Nalidixic acid complexes through the oxo-group on C-4 and the carboxylic acid group on C-3. Three moles of nalidixic acid complex with one mole of iron III. The instability constant of the complex was calculated to be 2.11 x 10 8 by Dick and Murgu.(34)... 

Degree hazard Health hazard color code blue Flammability hazard color code red Instability hazard color code yellow... 

CSC should be very popular and many people believe that it is robust due to the Cooper instability even for small attractive quark-quark interaction in color 3 channel [1]. On the contrary, we are afraid that FM has not been so familiar yet. So, we d like to begin with a brief introduction about our motivation for the study of FM. 

Attempted recychng and reuse of the heterogeneous catalyst (10) led to dramatic losses of activity. Following quantitative RCM of diethyl diallyhnalonate and simple filtration, the recovered resin was notably less active (<40% conversion) in a second run and the reaction mixture was dark in color. Such comphcations were attributed to the instability [14, 21] of Ru methylene (11) (Scheme 11.2) that propagates during the RCM of terminal diene substrates. In an effort to offset this solution-phase decomposition, the use of alkene additives was investigated. The... 

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