Certipur Certified sec. standard reference buffer solution potassium dihydrogen phosphate/di-sodium hydrogen phosphate, directly traceable to primar - CERTIFIED SEC. STANDARD REFERE [EM1.07202.0105-CS]
Colonial Scientific has teamed up with the industry leaders, Fisher Scientific and VWR, and now offers their entire product line. Colonial Scientific provides any part from the Fisher Scientific site with a part number.