Potassium biphthalate Buffer tablets pH 4.0 pH standard value: 4 877-24-7 C₈H₅KO₄ 204.22 g./mol ฿490.00 View
Potassium hydrogen phthalate NMR quantitative standard, 99.998% 877-24-7 C₈H₅KO₄ 204.22 g./mol ฿480.00 View