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and then, acting as a weak acid, hydrogen phthalate reacts reversibly with water to give hydronium (H 3 O +) and phthalate ions. HP − + H 2 O ⇌ P 2− + H 3 O + KHP can be used as a buffering agent in combination with hydrochloric acid (HCl) or sodium hydroxide (NaOH). The buffering region is dependent upon the pKa, and is typically +/- 1.0 ...
Phthalates (US: / ˈ θ æ l eɪ t s / UK: / ˈ θ ɑː l eɪ t s ˌ ˈ f θ æ l ɪ t s / [1] [2]), or phthalate esters, are esters of phthalic acid. They are mainly used as plasticizers , i.e., substances added to plastics to increase their flexibility, transparency, durability, and longevity.
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56.1 g/mol is the molecular weight of KOH, W oil is the mass of the sample in grams. The normality (N) of titrant is calculated as: = Where W KHP is the mass (g) of potassium hydrogen phthalate (KHP) in 50 ml of KHP standard solution,
The monopotassium salt, potassium hydrogen phthalate is a standard acid in analytical chemistry. Typically phthalate esters are prepared from the widely available phthalic anhydride . Reduction of phthalic acid with sodium amalgam in the presence of water gives the 1,3-cyclohexadiene derivative.
The Sri Lanka National Pharmaceuticals Policy was established in the 1970s following the submission of a report by Dr S.A. Wickremasinghe and Prof. Seneka Bibile. It aimed at ensuring that people get good quality drugs at the lowest possible price and that doctors would prescribe the minimum required drugs to treat the patient's illness.
It is a phthalate and is the diester of phthalic acid and the 10-carbon branched-chain alcohol 2-propylheptanol. This colorless, viscous liquid is used for softening PVC plastics and is a general purpose PVC plasticizer . [ 2 ]
It is commonly made by neutralizing picric acid with potassium carbonate. It has been used in industry since the 1860s. [1] Potassium Picrate and picric acid were formerly used in pyrotechnics to produce whistle effects, but since mixes that don't involve primary explosives have since been developed it is no longer used in that industry.