Contact lenses Use in whole grain breads[ edit ] Agricultural Research Service scientists are investigating using the plant-derived HPMC as a substitute for gluten in making all-oat and other grain breads. Like gluten, HPMC can trap air bubbles formed by the yeast in bread dough, causing the bread to rise. Use in construction materials[ edit ] HPMC is used primarily in construction materials like tile adhesives and renders  where it is used as a rheology modifier and water retention agent. Post-application, celluloid attributes of good water solubility reportedly aid in visual clarity. When applied, a hypromellose solution acts to swell and absorb water, thereby expanding the thickness of the tear-film. Hypromellose augmentation therefore results in extended lubricant time presence on the cornea, which theoretically results in decreased eye irritation, especially in dry climates, home, or work environments.
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An initial letter identifies the type of cellulose ether. The number that follows identifies the viscosity in millipascal-seconds mPa. In designating viscosity, the letter "C" is frequently used to represent and the letter "M" is used to represent 1, In the USP this is referred to as the labeled viscosity.
It is also given on the DuPont sales specification as the nominal viscosity. Several different suffixes are also used to identify special products. Developmental grades are denoted by the letter "X" plus a second letter usually "U" or "Y" plus a five-digit code.
This equates to a range of For Individual METHOCEL products exhibit these properties to varying degrees and may have additional properties that are desirable for specific applications. This feature provides exceptional handling flexibility and control of solubilization rate. The maximum concentration is limited only by solution viscosity.
Unlike gels formed by protein thickeners, the gels go back into solution upon cooling. This is valuable in food products, ceramics, coatings on adsorbent construction substrates, and many other applications. In food applications, this property is often used to retain moisture and prevent oil absorption during cooking. They are also used to improve pumpability of concrete and spray plasters, such as stucco, and in food applications as lubricity aids in extrusion and other forming processes.
Describe the regulatory and compendial status. Hydroxypropyl methylcellulose HPMC and methylcellulose MC are manufactured from highly purified cellulose which is further modified to obtain the desired properties. They are inert, high purity powders with no caloric value, and are virtually colorless, odorless and tasteless. Hydroxypropyl methylcellulose and methylcellulose are listed in the current U. Pharmacopoeia, European Pharmacopoeia and Japanese Pharmacopoeia.