Buffer solution
(di-sodium hydrogen phosphate/potassium dihydrogen phosphate), traceable to SRM from NIST and PTB pH 7.00 (20°C) Certipur®

pH-indicator strips pH 0 – 14 Universal indicator
non-bleeding pH 0 – 1 – 2 – 3 – 4 – 5 – 6 – 7 – 8 – 9 – 10 – 11 – 12 – 13 – 14 MQuant®

Potassium hydroxide pellets for analysis EMSURE®
Synonyms: Potash caustic
CAS #: 1310-58-3 Hill Formula: HKO Molar Mass: 56.11 g/mol EC Number: 215-181-3 Chemical Formula: KOH

Phenolphthalein indicator ACS,Reag. Ph Eur
CAS #: 77-09-8 Hill Formula: C₂₀H₁₄O₄ Molar Mass: 318.32 g/mol Grade: ACS,Reag. Ph Eur EC Number: 201-004-7

Sodium hydroxide pellets for analysis EMSURE®
Synonyms: Soda caustic
Hill Formula: HNaO EC Number: 215-185-5 CAS #: 1310-73-2 Chemical Formula: NaOH Molar Mass: 40.00 g/mol