Buffer mixture can be made from a mixture of an acid and its conjugate base.  We also have ready stock of Colour code pH Buffers  1.68, 4.01, 7.00, 6.86, 9.18, 10.01, 12.45
Available with ready stock for accurate calibration with traceability certificate.

Buffer pH 4 solution, colorless. Prepared with distilled water and checked for accuracy.

Also have Color Coded pH Buffer Solution, Buffer Solution 4

Buffer pH 4 solution manufacturer and supplier in Mumbai, Kandla, Kolkata, Gandhidham, Sohar, Barka, Ajman, Abudhabi, Dubai, Fujairah, VISAKHAPATNAM, chennai, CANADA