pH Buffers for Calibration

Certipur® Buffer Solutions and Substances for Precise pH Calibration

Our wide range of pH calibration buffers offers ideal product and packaging for your individual need. All buffer solutions are certified reference materials according to ISO 17034 and qualified in our DIN EN ISO/IEC 17025 accredited laboratory. They are all traceable to NIST (National Institute of Standards and Technology, USA) and PTB (Physical Technical Institute, Germany) primary reference materials. Buffers solutions are offered in PE bottles, pre-portioned in sachets and in Titripac packaging, measured at 20 °C or 25 °C.

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1.09951 Acetic acid for 500 ml, c(CH₃COOH) = 1 mol/l (1 N) Titrisol®
1.09944 Acetic acid for 1000 ml, c(CH₃COOH) = 0.1 mol/l (0.1 N) Titrisol®
1.09478 Ammonium buffer solution for complexometry (ammonium chloride/ammonia) pH = 10-11 Titripur®
1.09864 Ammonium iron(II) sulfate solution for 250 mlc[(NH₄)₂ Fe(SO₄)₂] = 0.1 mol/l (0.1 N) Titrisol®
1.09962 Barium chloride solution for 1000 ml, c(BaCl₂) = 0.05 mol/l (0.1 N) Titrisol®
1.09905 Bromide bromate solution for 1000 ml, c(Br₂) = 0,05 mol/l (0.1 N) Titrisol®
1.09887 Buffer concentrate (phosphate), traceable to SRM of NIST and PTB for 500 ml buffer solution, pH 7.00 ± 0.02 (20°C) Titrisol®
1.09884 Buffer concentrate (citrate/hydrochloric acid), traceable to SRM of NIST and PTB for 500 ml buffer solution, pH 4.00 ± 0.02 (20°C) Titrisol®
1.09889 Buffer concentrate (boric acid/potassium chloride/sodium hydroxide), traceable to SRM of NIST and PTB for 500 ml buffer solution, pH 9.00 ± 0.02 (20°C) Titrisol®
1.09883 Buffer concentrate (citrate/hydrochloric acid), traceable to SRM of NIST and PTB for 500 ml buffer solution, pH 3.00 ± 0.02 (20°C) Titrisol®
1.09892 Buffer concentrate (phosphate/sodium hydroxide), traceable to SRM of NIST and PTB for 500 ml buffer solution, pH 12.00 ± 0.05 (20°C) Titrisol®
1.09882 Buffer concentrate (citrate/hydrochloric acid), traceable to SRM of NIST and PTB for 500 ml buffer solution, pH 2.00 ± 0.02 (20°C) Titrisol®
1.09886 Buffer concentrate (citrate/sodium hydroxide), traceable to SRM of NIST and PTB for 500 ml buffer solution, pH 6.00 ± 0.02 (20°C) Titrisol®
1.09893 Buffer concentrate (potassium chloride/sodium hydroxide), traceable to SRM of NIST and PTB for 500 ml buffer solution, pH 13.00 ± 0.05 (20°C) Titrisol®
1.09888 Buffer concentrate (borate/hydrochloric acid), traceable to SRM of NIST and PTB for 500 ml buffer solution, pH 8.00 ± 0.02 (20°C) Titrisol®
1.09885 Buffer concentrate (citrate/sodium hydroxide), traceable to SRM of NIST and PTB for 500 ml buffer solution, pH 5.00 ± 0.02 (20°C) Titrisol®
1.09881 Buffer concentrate (glycine/hydrochloric acid), traceable to SRM of NIST and PTB for 500 ml buffer solution, pH 1.00 ± 0.02 (20°C) Titrisol®
1.09879 Buffer concentrate for buffer solution acc. to WEISE for 1000 ml of solution (phosphate), pH 7.20 Titrisol®
BX1627 Buffer Concentrate, pH 7.0
BX1633 Buffer pH 10.0 Blue
BX1641 Buffer pH 10.0 Blue
BX1642 Buffer pH 10.0 Clear
BX1636 Buffer pH 10.0 Clear
BX1651 Buffer pH 1.0 Clear
EM0180 Buffer pH 12.45
EM0182 Buffer pH 1.68
BX1652 Buffer pH 2.0 Clear
BX1653 Buffer pH 3.0 Clear
BX1634 Buffer pH 4.0 Clear
BX1628 Buffer pH 4.0 Red
BX1655 Buffer pH 5.0 Clear
BX1656 Buffer pH 6.0 Clear
EM0186 Buffer pH 6.86
BX1635 Buffer pH 7.0 Clear
BX1632 Buffer pH 7.0 Yellow
BX1657 Buffer pH 8.0 Clear
BX1658 Buffer pH 9.0 Clear
1.09439 Buffer solution (di-sodium hydrogen phosphate/potassium dihydrogen phosphate), traceable to SRM from NIST and PTB pH 7.00 (20°C) Certipur®
1.09435 Buffer solution (citric acid/sodium hydroxide/hydrogen chloride), traceable to SRM from NIST and PTB pH 4.00 (20°C) Certipur®
1.09438 Buffer solution (boric acid/potassium chloride/sodium hydroxide), traceable to SRM from NIST and PTB pH 10.00 (20°C) Certipur®
1.09477 Buffer solution (di-sodium hydrogen phosphate/potassium dihydrogen phosphate), colour: green traceable to SRM from NIST and PTB pH 7.00 (20°C) Certipur®
1.09461 Buffer solution (boric acid/potassium chloride/sodium hydroxide), traceable to SRM from NIST and PTB pH 9.00 (20°C) Certipur®
1.99002 Buffer solution (potassium dihydrogen phosphate/di-sodium hydrogen phosphate), traceable to SRM from NIST and PTB pH 7.00 (25°C) Certipur®
1.09475 Buffer solution (citric acid/sodium hydroxide/hydrogen chloride) colour: red traceable to SRM from NIST and PTB pH 4.00 (20 °C) Certipur®
1.99001 Buffer solution (potassium hydrogen phthalate), traceable to SRM from NIST and PTB pH 4.01 (25°C) Certipur®
1.09433 Buffer solution (citric acid/sodium hydroxide/hydrogen chloride), traceable to SRM from NIST and PTB pH 2.00 (20°C) Certipur®
1.09407 Buffer solution (potassium dihydrogen phosphate/disodium hydrogen phosphate)traceable to SRM from NIST and PTB pH 7.00 (25°C) Certipur®
1.09406 Buffer solution (potassium hydrogen phthalate), traceable to SRM from NIST and PTB pH 4.01 (25°C) Certipur®
1.99004 Buffer solution (boric acid/potassium chloride/sodium hydroxide), traceable to SRM from NIST and PTB pH 10.00 (25°C) Certipur®
1.09437 Buffer solution (citric acid/sodium hydroxide), traceable to SRM from NIST and PTB pH 6.00 (20°C) Certipur®
1.09476 Buffer solution (boric acid/potassium chloride/sodium hydroxide), coloured: blue traceable to SRM from NIST and PTB pH 9.00 (20°C) Certipur®
1.09409 Buffer solution (boric acid/potassium chloride/sodium hydroxide)traceable to SRM from NIST and PTB pH 10.00 (25°C) Certipur®
1.09436 Buffer solution (citric acid/sodium hydroxide) traceable to SRM from NIST and PTB pH 5.00 (20°C) Certipur®
1.07294 Buffer solution (di-sodium hydrogen phosphate/potassium dihydrogen phosphate) traceable to SRM from NIST and PTB pH 6.88 (20° C) Certipur®
1.99003 Buffer solution (boric acid/potassium chloride/sodium hydroxide solution), traceable to SRM from NIST and PTB pH 9.00 (25°C) Certipur®
1.09462 Buffer solution (boric acid/potassium chloride/sodium hydroxide), traceable to SRM from NIST and PTB pH 11.00 (20°C) Certipur®
1.09434 Buffer solution (citric acid/sodium hydroxide/hydrogen chloride), traceable to SRM from NIST and PTB pH 3.00 (20°C) Certipur®
1.09432 Buffer solution (glycine/sodium chloride/hydrogen chloride), traceable to SRM from NIST and PTB pH 1.00 (20°C) Certipur®
1.09408 Buffer solution (boric acid/potassium chloride/sodium hydroxide)traceable to SRM from NIST and PTB pH 9.00 (25°C) Certipur®
1.01645 Buffer solution (di-sodium tetraborate), traceable to SRM from NIST and PTB pH 9.22 (20°C) Certipur®
1.07827 Buffer solution (acetic acid/sodium acetate) traceable to SRM from NIST and PTB pH 4.66 (20°C) Certipur®
1.09445 Buffer solution (citric acid/sodium hydroxide/hydrogen chloride) traceable to SRM from NIST and PTB pH 4.00 (25°C) Certipur®
1.99019 Buffer solution (di-sodium tetraborate)tracable to SRM from NIST and PTB pH 9.18 (25°C) Certipur®
1.09441 Buffer solution (glycine/sodium chloride/hydrogen chloride), traceable to SRM from NIST and PTB pH 1.00 (25°C) Certipur®
1.99057 Buffer solution (di-sodium hydrogen phosphate/potassium dihydrogen phosphate), colour:yellowtraceable to SRM from NIST and PTB pH 7.00 (25°C) Certipur®
1.99064 Buffer solution (citric acid/sodium hydroxide/hydrogen chloride) tracable to SRM from NIST and PTB pH 4.00 (25°C) Certipur®
1.09442 Buffer solution (citric acid/sodium hydroxide/hydrogen chloride), traceable to SRM from NIST and PTB pH 2.00 (25°C) Certipur®
1.99054 Buffer solution (citric acid/sodium hydroxide/hydrogen chloride) colour: red, traceable to SRM from NIST and PTB pH 4.00 (25 °C)
1.99036 Buffer solution (citric acid/sodium hydroxide), traceable to SRM from NIST and PTB pH 6.00 (25°C) Certipur®
1.09446 Buffer solution (citric acid/sodium hydroxide) traceable to SRM from NIST and PTB pH 5.00 (25°C) Certipur®
1.99038 Buffer solution (boric acid/sodium hydroxide/hydrogen chloride), traceable to SRM from NIST and PTB pH 8.00 (25°C) Certipur®
1.09444 Buffer solution (citric acid/sodium hydroxide/hydrogen chloride), traceable to SRM from NIST and PTB pH 3.00 (25°C) Certipur®
1.99022 Buffer Solution (di-sodium hydrogen phosphate/sodium hydroxide) traceable to SRM from NIST und PTB pH 12.00 (25°C) Certipur®
1.99012 Buffer Solution (citric acid, sodium hydroxide, hydrogen chloride) tracable to SRM from NIST and PTB pH 2.00 (25°C) Certipur®
1.99021 Buffer Solution (boric acid, sodium hydroxide, potassium chloride) tracable to SRM from NIST and PTB pH 11.00 (25°C) Certipur®
1.99006 Buffer solutions traceable to SRM from NIST and PTB 10 x pH 4.01 (phthalate) 10 x pH 7.00 (phosphate) 10 x pH 10.00 (borate) pH 4.01/pH 7.00/pH 10.00(25°C) Certipur®
1.99005 Buffer solutions traceable to SRM from NIST and PTB 10 x pH 4.01 (phthalate) 10 x pH 7.00 (phosphate) 10 x pH 9.00 (borate) pH 4.01/pH 7.00/pH 9.00 (25°C) Certipur®
1.99041 Buffer solutions (boric acid/potassium chloride/sodium hydroxide), traceable to SRM from NIST and PTB pH 11.00 (25°C) Certipur®
BX1626 Buffer Variety Pack, Kit
PH1020CF Certified pH Buffer Solution, pH 10 at 20 °C, Coloured (Blue), with Fungicide
PH1025CF Certified pH Buffer Solution, pH 10 at 25 °C, Coloured (Blue), with Fungicide
PH420CF Certified pH Buffer Solution, pH 4 at 20 °C, Coloured (Red), with Fungicide
PH425CF Certified pH Buffer Solution, pH 4 at 25 °C, Coloured (Red), with Fungicide
PH720CF Certified pH Buffer Solution, pH 7 at 20 °C, Coloured (Yellow), with Fungicide
PH725CF Certified pH Buffer Solution, pH 7 at 25 °C, Coloured (Yellow), with Fungicide
1.07202 Certified sec. standard reference buffer solution potassium dihydrogen phosphate/di-sodium hydrogen phosphate, directly traceable to primary SRM from NIST/PTB pH(S) = 6.86₅ (25°C) Certipur®
1.07204 Certified sec. standard reference buffer solution potassium tetraoxalate dihydrate, directly traceable to primary SRM from NIST/PTB pH(S) = 1.67₉ (25°C) Certipur®
1.07203 Certified sec. standard reference buffer solution di-sodium tetraborate decahydrate, directly traceable to primary SRM from NIST/PTB pH(S) = 9.18₀ (25°C) Certipur®
1.07205 Certified sec. standard reference buffer solution potassium dihydrogen phosphate/di-sodium hydrogen phosphate, directly traceable to primary SRM from NIST/PTB pH(S) = 7.41₃ (25°C) Certipur®
1.06587 di-Sodium hydrogen phosphate solution (buffer stock solution) 1/15 mol/l
1.01964 di-Sodium tetraborate decahydrate certified secondary standard reference material for pH measurement; directly traceable to primary SRM from NIST/PTB pH(S)=9.18₀ (25°C) Certipur®
1.09973 Hydrochloric acid for 1000 ml, c(HCl) = 0.1 mol/l (0.1 N) Titrisol®
1.09971 Hydrochloric acid for 1000 ml, c(HCl) = 0.5 mol/l (0.5 N) Titrisol®
1.09974 Hydrochloric acid for 1000 ml, c(HCl) = 0.01 mol/l (0.01 N) Titrisol®
1.09914 Iodide iodate solution for 1000 ml, c(I₂) = 1/128 mol/l (1/64 N) Titrisol®
1.09966 Nitric acid for 1000 ml, c(HNO₃) = 1 mol/l (1 N) Titrisol®
1.09964 Nitric acid solution for 1000 ml , c(HNO₃) = 0.1 mol/l (0.1 N) Titrisol®
1.09965 Oxalic acid solution for 1000 ml, c(C₂H₂O₄) = 0.05 mol/l (0.1 N) Titrisol®
1.09932 Oxalic acid solution for 1000 ml, c(C₂H₂O₄) = 0.005 mol/l (0.01 N) Titrisol®
1.09925 Potassium bromate solution for 1000 ml, c(KBrO₃) = 1/₆₀ mol/l (0.1 N) Titrisol®
1.04817 Potassium chloride solution 3 mol/l
1.04818 Potassium chloride solution saturated with silver chloride 3 mol/l
1.01811 Potassium chloride solution ( nominal 0.015 mS/cm) certified reference material for the measurement of electrolytic conductivity, traceable to PTB and NIST (c=0.0001 mol/l) Certipur®
1.01557 Potassium chloride solution (nominal 0.147 mS/cm) certified reference material for the measurement of electrolytic conductivity (c=0.001 mol/l) Certipur®
1.01586 Potassium chloride solution (nominal 0.147 mS/cm) certified reference material for the measurement of electrolytic conductivity, traceable to PTB and NIST (c = 0.001 mol/l) Certipur®
1.01254 Potassium chloride solution (nominal 12.8 mS/cm) certified reference material for the measurement of electrolytic conductivity (c=0.1 mol/l) Certipur®
1.01554 Potassium chloride solution (nominal 12.8 mS/cm) certified reference material for the measurement of electrolytic conductivity, traceable to PTB and NIST (c=0.1 mol/l) Certipur®
1.01203 Potassium chloride solution (nominal 1.41 mS/cm) certified reference material for the measurement of electrolytic conductivity (c=0.01 mol/l) Certipur®
1.01553 Potassium chloride solution (nominal 1.41 mS/cm) certified reference material for the measurement of electrolytic conductivity, traceable to PTB and NIST (c=0.01 mol/l) Certipur®
1.09928 Potassium dichromate solution for 1000 ml, c(K₂Cr₂O₇) = 1/₆₀ mol/l (0.1 N) Titrisol®
1.04875 Potassium dihydrogen phosphate solution (buffer stock solution) 1/₁₅ mol/l
1.01965 Potassium hydrogen phthalate certified secondary standard reference material for pH measurement; directly traceable to primary SRM from NIST/PTB pH(S) = 4.00₅ (25°C) Certipur®
1.01963 Potassium hydrogen tartrate certified secondary standard reference material for pH measurement; directly traceable to primary SRM from NIST/PTB pH(S) = 3.63₉ / pH(S) = 3.55₇ (25°C) Certipur®
1.09921 Potassium hydroxide solution for 1000 ml, c(KOH) = 0.1 mol/l (0.1 N) Titrisol®
1.09918 Potassium hydroxide solution for 1000 mlc(KOH) = 1 mol/l (1 N) Titrisol®
1.09919 Potassium hydroxide solution for 1000 mlc(KOH) = 0.5 mol/l (0.5 N) Titrisol®
1.09917 Potassium iodate solution for 1000 ml, c(KIO₃) = 1/₆₀ mol/l (0.1 N) Titrisol®
1.09935 Potassium permanganate solution
1.01961 Potassium tetraoxalate dihydrate certified secondary standard reference material for pH measurement; directly traceable to primary reference material from NIST/PTB pH (S) = 1.67₉ (25°C) Certipur®
1.09945 Sodium chloride solution for 1000 ml, c(NaCl) = 0.1 mol/l (0.1 N) Titrisol®
1.01962 Sodium hydrogen carbonate/sodium carbonate certified secondary standard reference material for pH measurement; directly traceable to primary SRM from NIST/PTB pH(S) = 10.01₂ (25°C) Certipur®
1.09959 Sodium hydroxide solution for 1000 ml, c(NaOH) = 0.1 mol/l (0.1 N) Titrisol®
1.09956 Sodium hydroxide solution for 1000 ml, c(NaOH) = 1 mol/l (1 N) Titrisol®
1.09957 Sodium hydroxide solution for 1000 ml, c(NaOH) = 0.5 mol/l (0.5 N) Titrisol®
1.09961 Sodium hydroxide solution for 1000 ml, c(NaOH) = 0.01 mol/l (0.01 N) Titrisol®
1.09958 Sodium hydroxide solution for 1000 ml, c(NaOH) = 0.25 mol/l (0.25 N) Titrisol®
1.09909 Sodium thiosulfate solution for 1000 ml, c(Na₂S₂O₃) = 0,01 mol/l (0.01 N) Titrisol®
1.09984 Sulfuric acid for 1000 ml, c(H₂SO₄) = 0.05 mol/l (0.1 N) Titrisol®
1.09981 Sulfuric acid for 1000 ml, c(H₂SO₄) = 0.5 mol/l (1 N) Titrisol®
1.09982 Sulfuric acid for 1000 ml, c(H₂SO₄) = 0.005 mol/l (0.01 N) Titrisol®
1.09912 Sulfuric acid 1.000 l for the preparation of dilute volumetric solutions or for direct use c(H₂SO₄) = 2.5 mol/l (5 N) Combi-Titrisol®
1.09992 Titriplex® III solution for 1000 ml, c(Na₂-EDTA 2 H₂O) = 0.1 mol/l Titrisol®
1.08419 Titriplex® solution A for the determination of alkaline earth metals in water 1 ml ≙ 56 mg CaO/l using 100 ml of water
1.09991 Zinc sulfate solution for 1000 ml, c(ZnSO₄) = 0.1 mol/l (0.1 N) Titrisol®