Cosmetics chemical stability

Noncertified colors, 12 51 Noncertified pigments, performance criteria in cosmetic use, 7 860t Non-cGMP products, 11 427, 433 Non-chemical stabilization methods, in PTG systems, 19 366 Nonchlorinated pesticides and herbicides bioremediation, 3 776—779 Nonchlorine oxidizers, in swimming pools, 26 189-190... 

Freedom from toxicity is clearly the primary consideration for dyes used in foods, drugs and cosmetics, followed by high solubility and chemical stability in the appropriate medium of incorporation. The possibility that they may affect consumers adversely has caused growing concern [59,60]. Legislation over many years has increasingly restricted the usage of synthetic colorants to certain permitted products that have shown no harmful effects when tested rigorously. 

Oxychem markets two lines of impact modified PVC OxyblencT and OxyClear , in which an elastomeric phase is dispersed in the PVC matrix. OxyClear is a series of clear, high impact, UV stabilized compositions developed particularly for blow molding bottles for cosmetics, chemicals, foodstuff. The OxyBlend series is designed for injection molding and extrusion of housing applications such as gutters and window profiles. 

Cyclodextrin inclusion compounds have found application in pharmacology, the food industry, and cosmetics. Typical examples are the solubilization of insulin and steroids, the removal of cholesterol from egg yolk, and the conservation of basis notes in perfumes by slow release rates of rose oil and similar ingredients. Chemical stabilization of oxygen-sensitive compounds, e.g., the sulfides of onions and garlic flavor, and of vitamins is also achieved by cyclodexteins. 

Uses Surfactants emulsifier, stabilizer in cosmetics chemical intermediate in coatings processing aid, lubricant, dispersant in plastics food-pkg. adhesives... 

Uses Emulsifier for creams/lotions, oils, fats, waxes, cosmetics, min. oil and paraffin wax emulsions, leather dressings, textile specialties, polishes, cleaners absorbent for acidic gases medicine buffer in cosmetics solubilizer, stabilizer, buffer in pharmaceuticals formaldehyde scavenger in curing U-F resins, phenolics amine soaps (metalworking fluids) synthesis of surfactants, vulcanization accelerators, pharmaceuticals chemical intermediate for paints, etc. 

Toxicology No known toxicity TSCA listed Uses Lubricant, emulsifier, plasticizer, opacifier in cosmetics, shampoos, pharmaceuticals lubricant for plastics processing activator for NR, SR plasticizer, softener in rubber waxes plasticizers chemicals stabilizers lubricating oils textile auxs. 

Biosurfactants are microbial surface active compounds and have tremendous applications in cosmetics due to their high surface activity and multifarious bioactivities. Surfactants are widely used in cosmetics for stabilizing the oH—water emulsion and uniformly dispersing various components. The key feature of surfactants used in cosmetic formulation is their skin friendly nature, which means that the surfactant is safe and compatible with the skin. The advantages of biosurfactants over chemical surfactants are their... 

Titanium dioxide (Ti02) is an n-type SC with a wide Eg of 3.0-3.5eV, it is well-known for its potential applications in the field of photocatalysis and photoelectrochemistry because of its excellent optical transmittance and high refractive index (2.5-3.87) (Table 1) [11]. Ti02 is of outstanding importance as a white pigment because of its scattering properties, chemical stability, biological inertness, and lack of toxicity. Applications are found in paints, papers, fibers, cosmetics, sunscreen products, toothpaste etc. 

Semi-solid emulsions or creams should have both physical and chemical stability, acceptable cosmetic effect and optimum environment for the active ingredient to reach the skin. The most commonly used creams are those based on a mixture of an ionic surfactant, such as cetrimide, with cetostearyl alcohol (e.g. in Cetavlon cream) or a mixture of nonionic surfactant (such as Cetomacrogel, an alcohol ethoxylate) with cetyl or stearyl alcohol [52]. 

It is difficult to imagine cosmetology and the field of modem aesthetic medicine without hyaluronan. A glance at the worldwide periodical literature would reveal that practically every issue includes several articles more or less connected with HA. Physician-cosmetologists were initially interested in hyaluronan because of its unique ability to retain large amounts of water. This property has been maximized for cosmetic products and moisturising masks. From the mid-nineteenth to the twentieth century, chemically stabilized (cross-linked) HA became used as intradermal micro-implants (fillers) for the contour correction of the involuntary changed skin [1]. 

The convenient properties of liquid and solid dimethylpolysiloxanes (thermal and chemical stability, hydrophobicity, anti-adhesive behavior, etc.) make them suitable for a variety of technical applications in medicine. Especially pure preparations (Silastic ) have been used to construct artificial limbs, gullets, cardiac valves, trachea, etc., and in face-lifting. Silicon rubber breast implants, which are filled with a polysiloxane gel, have been used cosmetically. Synthetic arteries impregnated with silicon do not break or cause coagulation, they are flexible, and they are well tolerated immunologically. Silicones prevent the formation of foam in equipment for artificial blood circulation (heart-lung machines). The surfaces of such equipment, and of the... 

Definition Mixture of syn. fatty alcohols with 30-50 carbons in the alkyl chain Uses Surfactants emulsifier, stabilizer in cosmetics chemical intermediate in coatings processing aid, lubricant, dispersant in plastics food-pkg. adhesives thickener, moisturizer, pigment dispersant, oil binder, stabilizer in cosmetic creams, lotions, lipsticks, antiperspirants, and soaps Manuf./Distrib. Somerset Cosmetic Co. Variati TradeNames Unilin 550Alcohol C40-60 alcohols CAS 222400-19-3 Synonyms Alcohols, C40-60... 

As a pharmaceutical, methyl salicylate is used in liniments and ointments for the relief of pain and for rheumatic conditions. As a flavor and fragrance agent, it is used in confectioneries, dentifrices, cosmetics, and perfumes. Other commercial applications for methyl salicylate are as a dye carrier, as a uv-light stabilizer in acrylic resins, and as a chemical intermediate. The May 1996 price was 5.50/kg (18). 

Chlorinated polyether is formulated particularly for products requiring, good chemical resistance. Other materials exhibiting good chemical resistance include all of the fluorocarbon plastics, ethylpentenes, polyolefins, certain phenolics, and diallyl phtha-late compounds. Additives such as fillers, plasticizers, stabilizers, colorants, and type catalysts can decrease the chemical resistance of unfilled plastics. Certain chemicals in cosmetics will affect plastics, and tests are necessary in most cases with new formulations. Temperature condition is also very important to include in the evaluation. Careful tests must be made under actual use conditions in final selection studies. 

Chemically, GA is a complex mixture of macromolecules of different size and composition (mainly carbohydrates and proteins). Today, the properties and features of GA have been widely explored and developed and it is being used in a wide range of industrial sectors such as textiles, ceramics, lithography, cosmetics and pharmaceuticals, encapsulation, food, etc. Regarding food industry, it is used as a stabilizer, a thickener and/or an emulsifier agent (e.g., soft drink syrup, gummy candies and creams) (Verbeken et al., 2003). 

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