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In addition, chemical compatibility refers to the container material being acceptable to store the chemical or for a tool or object that comes in contact with a chemical to not degrade. For example, when stirring a chemical, the stirrer must be stable in the chemical that is being stirred. Many companies publish chemical resistance charts.
Trifluoroacetic acid in a beaker. TFA is the precursor to many other fluorinated compounds such as trifluoroacetic anhydride, trifluoroperacetic acid, and 2,2,2-trifluoroethanol. [4] It is a reagent used in organic synthesis because of a combination of convenient properties: volatility, solubility in organic solvents, and its strength as an ...
In the paint and coating industries, paint adhesion testing is often used to determine if the paint or coating will adhere properly to the substrates to which they are applied. Several tests measure the resistance of paints and coatings from substrates: cross-cut test, scrape adhesion, pull-off test , and others.
It is advised to check the references for photos of reaction results. [1] Reagent testers might show the colour of the desired substance while not showing a different colour for a more dangerous additive. [2]
Initially the desired coating is applied in a puddle on the drawdown chart. Then the bar is placed at the top of the chart, and drawn down over the paint in order to spread it evenly along the length of the chart. Once this evenly spread paint dries, it can be tested for a variety of properties. [5]
Trifluoroacetic anhydride was originally prepared by the dehydration of trifluoroacetic acid with phosphorus pentoxide. [2] The dehydration might also be carried out with excess α-halogenated acid chlorides. For example, with dichloroacetyl chloride: [3] 2 CF 3 COOH + Cl 2 CHCOCl → (CF 3 CO) 2 O + Cl 2 CHCOOH + HCl
Fallstreak holes were only recently officially given a more scientific designation.The holes officially have been given the supplementary feature name "Cavum" by the World Meteorological Organization.
Trifluoroperacetic acid (trifluoroperoxyacetic acid, TFPAA) is an organofluorine compound, the peroxy acid analog of trifluoroacetic acid, with the condensed structural formula CF 3 COOOH . [ Note 1 ] It is a strong oxidizing agent for organic oxidation reactions, such as in Baeyer–Villiger oxidations of ketones . [ 1 ]