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Polyvinyl alcohol (PVOH, PVA, or PVAl) is a water-soluble synthetic polymer. It has the idealized formula [CH 2 CH(OH)] n . It is used in papermaking , textile warp sizing , as a thickener and emulsion stabilizer in polyvinyl acetate (PVAc) adhesive formulations, in a variety of coatings, and 3D printing .
Formvar refers to any of several thermoplastic resins that are polyvinyl formals, which are polymers formed from polyvinyl alcohol and formaldehyde as copolymers with polyvinyl acetate. They are typically used as coatings, adhesives , and molding materials.
Polyethylene glycol–polyvinyl alcohol (PEG-PVA) brand name Kollicoat IR is a multifunctional excipient [1] used as a pill binder as well as a wet binder. A typical formulation is composed of 25% polyethylene glycol (PEG) and 75% polyvinyl alcohol (PVA); where the vinyl alcohol moieties are grafted on a polyethylene glycol backbone.
NFPA 704 safety squares on containers of ethyl alcohol and acetone. "NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response" is a standard maintained by the U.S.-based National Fire Protection Association.
The Paddington alcohol test (PAT) was first published in the Journal of Accident & Emergency Medicine in 1996. It was designed to identify alcohol-related problems amongst those attending accident and emergency departments .
In enzymology, a polyvinyl-alcohol oxidase (EC 1.1.3.30) is an enzyme that catalyzes the chemical reaction. polyvinyl alcohol + O 2 oxidized polyvinyl alcohol + H 2 O 2. Thus, the two substrates of this enzyme are polyvinyl alcohol and O 2, whereas its two products are oxidized polyvinyl alcohol and H 2 O 2.
In enzymology, a polyvinyl-alcohol dehydrogenase (acceptor) (EC 1.1.99.23) is an enzyme that catalyzes the chemical reaction polyvinyl alcohol + acceptor ⇌ {\displaystyle \rightleftharpoons } oxidized polyvinyl alcohol + reduced acceptor
Lead(II) azide is prepared by the reaction of sodium azide and lead(II) nitrate in aqueous solution. [6] [5] Lead(II) acetate can also be used.[7] [8]Thickeners such as dextrin or polyvinyl alcohol are often added to the solution to stabilize the precipitated product.