Potassium hydrogen phthalate/Potassium acid phthalate/Phthalic acid potassium acid salt/Phthalic aci
Item No.： R0934
Store at： RT
English name：Potassium hydrogen phthalate；Potassium acid phthalate；Phthalic acid potassium acid salt；Phthalic acid monopotassium salt
Other names: potassium hydrogen benzoate; Potassium hydrogen phthalate; Potassium hydrogen 1,2-benzoate; 1,2-benzoic acid monopotassium salt
CAS No.: 877-24-7
C8H5KO4=204.22
grade: gr
Content: ≥ 99.8%
pH(50g/L，25℃)：3.8～4.2
Heavy metals: ≤ 0.0005%
Chloride: ≤ 0.002%
Clarity test: acceptable
Drying loss: ≤ 0.03%
Total sulfur compounds: ≤ 0.006%
Water insoluble matter: ≤ 0.03%
Sodium: ≤ 0.01%
Ammonium: ≤ 0.003%
Iron: ≤ 0.0003%
Physicochemical Properties: colorless monoclinic crystal or white crystalline powder. Stable in air. Soluble in about 12 parts of cold water and 3 parts of boiling water, slightly soluble in ethanol. The solution is acidic. The pH of 0.05mol/l aqueous solution at 25 ℃ is 4.005. The relative density (d254) is 1.636. Melting point 295 ~ 300 ℃ (decomposition).
Purpose: biochemical research. Analytical reagent. Benchmark for calibrating alkali. Prepare buffer solution
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