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The pKa of KHP is 5.4, so its pH buffering range would be 4.4 to 6.4; however, due to the presence of the second acidic group that bears the potassium ion, the first pKa also contributes to the buffering range well below pH 4.0, which is why KHP is a good choice for use as a reference standard for pH 4.00.
The State Pharmaceuticals Corporation (SPC) is a state-owned enterprise with its headquarters in Colombo, Sri Lanka.It is the largest supplier of drugs in the country, and is tasked with providing quality-assured health care items that are safe and effective, at an affordable price, while educating the public on the rational use of drugs.
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.
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.
Monopotassium phosphite is an inorganic compound with the formula KH 2 PO 3.A compositionally related compound has the formula H 3 PO 3. 2(KH 2 PO 3).Both are white solids that consist of salts of the phosphite anion H 2 PO 3 −, the conjugate base of phosphorous acid.
Dipotassium phosphate (K 2 HPO 4) (also dipotassium hydrogen orthophosphate; potassium phosphate dibasic) is the inorganic compound with the formula K 2 HPO 4. (H 2 O) x (x = 0, 3, 6). Together with monopotassium phosphate (KH 2 PO 4. (H 2 O) x), it is often used as a fertilizer, food additive, and buffering agent. [1]
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.
Potassium pyrosulfate is obtained by the thermal decomposition of other salts, most directly from potassium bisulfate: [1] 2 KHSO 4 → K 2 S 2 O 7 + H 2 O. Temperatures above 600°C further decompose potassium pyrosulfate to potassium sulfate and sulfur trioxide however: [2] K 2 S 2 O 7 → K 2 SO 4 + SO 3
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