Search results
Results from the WOW.Com Content Network
The acid number for an oil sample is indicative of the age of the oil and can be used to determine when the oil must be changed. [5] A liquid fat sample combined with neutralized 95% ethanol is titrated with standardized sodium hydroxide of 0.1 eq/L normality to a phenolphthalein endpoint. The volume and normality of the sodium hydroxide are ...
In strongly basic solutions, phenolphthalein is converted to its In(OH) 3− form, and its pink color undergoes a rather slow fading reaction [6] and becomes completely colorless when pH is greater than 13. The pK a values of phenolphthalein were found to be 9.05, 9.50 and 12 while those of phenolsulfonphthalein are 1.2 and 7.70.
The pH of a solution is defined as the negative logarithm of the concentration of H +, and the pOH is defined as the negative logarithm of the concentration of OH −. For example, the pH of a 0.01 in moles per litreM solution of hydrochloric acid (HCl) is equal to 2 (pH = −log 10 (0.01)), while the pOH of a 0.01 M solution of sodium ...
It’s common practice when using natural dyes on fabric or yarn to adjust the pH of the solution to achieve different color effects, and the same is true when using natural food colorings ...
Peanut oil/Ground nut oil – mild-flavored cooking oil. Pecan oil – valued as a food oil, but requiring fresh pecans for good quality oil. [9] Pectin – vegetable gum, emulsifier; Perilla seed oil – high in omega-3 fatty acids. Used as an edible oil, for medicinal purposes, in skin care products and as a drying oil.
Its use as a food dye was legalized in the US by the Pure Food and Drug Act of 1906. [6] By early 1920s, it was produced mainly for the food industry, [ 7 ] with 2,170 pounds (0.98 t) made in America in 1924, [ 8 ] rising to 9,468 pounds (4.29 t) in 1938 [ 9 ] and approximately 50 tons in 1967.
A variety of food colorings, added to beakers of water. Food coloring, color additive or colorant is any dye, pigment, or substance that imparts color when it is added to food or beverages. Colorants can be supplied as liquids, powders, gels, or pastes. Food coloring is commonly used in commercial products and in domestic cooking.
Allura Red AC is the coloring additive in this strawberry soft drink Allura Red AC in confectionery. Allura Red has been heavily studied by food safety groups in North America and Europe, and remains in wide use. However, chronic exposure to the dye has been shown to increase susceptibility to bowel disorders in mice. [11]