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  • Purified Water, USP

    Water rendered suitable for pharmaceutical purposes by using unit operations that include deionization, distillation, ion-exchange, reverse osmosis, filtration, or other suitable purification procedures. It meets rigid specifications for chemical purity, the requirements of the Federal Environmental Protection Agency (EPA) with respect to drinking water, and it contains no added substances. Cannot be used as raw material for parenterals. Common uses are: a rinse for equipment, vials, and ampoules, and as make up for cosmetics, bulk chemicals, and oral products. For FDA acceptance, purified water must contain less than 0.5 mg/l of TOC (Total Organic Carbon), and less than 100 CFU (Colony Forming Units).
  • Purine

    A nitrogen-containing, double-ring, basic compound that occurs in nucleic acids. The purines in DNA and RNA are adenine and guanine.
  • Purity

    The ratio of desirable to undesirable components in a liquid as determined on a weight basis per unit volume of sample.
  • PURs

    Process User Requirements
  • PV

    Photovoltaics
  • PVA

    Polyvinyl Acetate
  • PVA

    Polyvinyl Alcohol
  • PVAc

    Polyvinyl Acetate
  • PVB

    Polyvinyl Butyral (butyrate)
  • PVC

    Polyvinyl Chloride
  • PVC (Polyvinyl Chloride)

    The largest volume of the vinyl family of plastics. Overall it has excellent basic properties, may be easily processed and welded, and is exceptionally economical in cost. Homopolymers grades of PVC comprise over 80% of all PVC used, and contain 56.8% chlorine by weight. When the chlorine content is increased to about 67% its heat deflection temperature at 264 psi increases from 155°F (68°C) to 218°F (103°C). Because PVC is a thermally sensitive thermoplastic compounding ingredients such as heat stabilizers, lubricants, fillers, plasticizers, impact modifiers, pigments, and processing aids must be added to make it processible. PVC is prone to produce extractables during start-up in high purity water.
  • PVCA

    Polyvinyl Chloride Acetate
  • PVCC

    Chlorinated Polyvinyl Chloride
  • PVDC

    Polyvinylidene Chloride
  • PVDF

    Polyvinylidene Fluoride (Kynar®, Sygef®)
  • PVDF (Polyvinylidene Fluoride)

    Homopolymer and/or copolymer material composed of carbon, hydrogen, and fluorine.
  • PVDF (Polyvinylidene Fluoride) Kynar®, Sygef®, Solef®

    A thermoplastic fluoropolymer with a melt point of 352°F (178°C), and a wide service range from -40°F (-40°C) to 284°F (140°C). It has a very linear chemical structure, and is similar to PTFE with the exception of not being fully fluorinated, i.e. having 3% hydrogen by weight. Its drawbacks in the area of chemical resistance include unsuitability with strong alkalis, fuming acids, polar solvents, amines, ketones, and esters. It has a high tensile strength as well as a high heat deflection temperature. It is readily weldable, offers high purity qualities, and is resistant to permeation of gases. PVDF is a relatively inert material and contributes little in the way of contamination to pharmaceutical water.
  • PVF

    Polyvinyl Fluoride
  • PVK

    Polyvinyl Carbazol
  • PVM

    Silicone Rubber
  • PVM

    Pneumonia Virus of Mice
  • PVOH

    Polyvinyl Alcohol
  • PVP

    Polyvinylpyrrolidone
  • PW

    Purified Water
  • PXRD

    Powder X-Ray Diffraction