Humectant substances

Hull cell PHYS CHEM An electrodeposition cell that operates within a simultaneous range of known current densities. hoi, sel humectant chem A substance which absorbs or retains moisture examples are glycerol, propylene glycol, and sorbitol used in preparing confectioneries and dried fruit. hyu mek-tont ... 

Humectants. A substance such as glycerol with an affinity for water that is used to keep moisture content of products like baked goods and... 

Humectants hygroscopic substances incorporated in a product to promote retention of moisture, including moisture retention agents and antidusting agents. 

Glycerol is a hygroscopic, nonvolatile, and viscous substance that shows special benefit as a humect-ant in comparison to liquid and crystalline polyols. Glycerol has been used as an effective moisturizer and humectant in cosmetic products and is recognized as an over-the-counter skin protectant.73... 

Humectant A chemical compound or substance that promotes the retention of moisture. 

It should be mentioned that product formulation can also influence percutaneous absorption. An ointment vehicle with a high proportion of oils and fats is more likely to ensure skin penetration. A hydrophilic cream base is favorable to the absorption of more hydrophilic compounds. Skin hydration, which is achievable by the incorporation of humectants (e.g., glycerol) or by occluding dressings, can also be helpful. Particle size of substances that are not readily solubilized in the vehicle used must also be considered in developing the dermatological product. 

As a humectant (a substance that attracts moisture) in keeping some food, tobacco, and industrial products dry ... 

Humectants are edible substances that lower the a , to 0.60-0.90 and offer advantages in production. Webster et al. (1982) investigated utilization... 

A second, more popular type of moisturizer works by attracting water from the air and skin. These products form a water-rich layer that adheres to the skin without giving it a greasy feel. The substances that attract water are called hu-mectants, and are compounds capable of forming hydrogen bonds with water. Some examples of humectants used in... 

If you are shopping for a moisturizer, remember that the main characteristic you should look for in a product is the ability to form a barrier to prevent water evaporation, or the ability to act as a humectant. Some expensive products advertise that in addition to moisturizing, they also beautify the skin and even reverse aging because they contain proteins such as collagen and elas-tin, vitamins, hormones, or even DNA. It is unlikely that such substances can pass through the epidermis of the skin in sufficient amounts to provide the advertised benefits. 

Modern toothpaste formulations include a variety of substances, each of which fulfils a specific purpose. The humectant prevents dehydration of the dicalcium phosphate dihydrate to the anhydrous form which is too abrasive. A representative formulation is... 

The combined use of these substances is the rule, as they can have an additive beneficial effect humectants have a very effective and almost immediate effect of attracting water to the SC and, if we add an occlusive lipid-rich emollient that penetrates the intercellular space, it will keep the water trapped within the SC and... 

Oil-water emulsions, water-oil emulsions, tannery substances, zinc oxide, talcum, perfluorpolyethers, chelating agents, ultra-violet protectors Detergents, solvents, natural and synthetic grits Emollients, moisturizers, humectants, lipids... 

Theoretically a hydrogel is safer for the cilia than a nasal ointment with fatty components. Compared to nasal drops the application of a hydrogel is more efficient, and it stays longer on the mucosa, thus raising the chances for absorption of the active substance. Gels containing humectants (glycerol, sorbitol and mannitol) are supposed to diminish the irritation caused by some active substances. 

The aqueous phase may contain, apart from water, water-miscible liquids as humectants, co-solvents or penetration enhancers. The aqueous phase has to be preserved. If substances are dispersed in the aqueous phase they are considered part of the solid phase (see Sect. 12.5.1). For the substances reference is made to appropriate sections of Chap. 23 Raw materials. Just some functional details are mentioned here. 

The outer phase of hydrophilic creams consist of water, dissolved active substances, preservatives and humectants see Sect. 12.5.3. 

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