CPAchem

(A2LA Cert No. 7668.01) 07/13/2026 Page 2 of 4 Certified Reference Material/ Matrix or Artifact Property Value(s)/ Property Identity/ Range/ Uncertainty Approach Used to Assign Property Values Single and Multi-Component Organic and Inorganic Materials in Solution (cont): • pH Standards • Conductivity Standards • Volumetric Solutions • Alcohol • Total Acid Number (TAN) • Total Base Number (TBN) • Total Organic Carbon • Potassium Dichromate for UV/VIS • Water Content • Turbidity • Chemical Oxygen Demand (COD) • Color • Osmolality • Refractive Index • Sugar Content (°Brix) pH: 1.679 - 12.000; Uncertainty range: 0.010 - 0.020 Conductivity: 5.00 µS/cm – 840 000 µS/cm; Uncertainty range: 1 % - 5 % Concentration: 0.001 mol/l – 20 mol/l; Uncertainty range: 0.2 % - 2.0 % Ethanol content: 1 % v/v -100 % v/v; Uncertainty range: 0.01 % v/v -0.05 % v/v Concentration: 0.1 mgKOH/g - 100 mgKOH/g; Uncertainty range: 1.0 % - 5.0 % Concentration: 1 mg/L - 80 000 mg/L; Uncertainty range: 1.0 % - 5.0 % Concentration: 1 mg/L - 600 mg/L; Uncertainty range: 1.0 % - 5.0 % Concentration: 21 mg/kg - 100000 mg/kg; Uncertainty range: 0.5 % - 1.5 % Turbidity: 1 NTU - 4000 NTU; Uncertainty range: 0.2 % - 2.0 % COD: 1 mg/l O 2 - 80000 mg/l O2; Uncertainty range: 1.0 % - 5.0 % Hazen: 5 mg/l Pt - 500 mg/l Pt; Uncertainty range: 0.5 % - 5.0 % Saybolt - from -15 to +30 Uncertainty range: 0.5 % - 5.0 % Gardner - from 1 to 18 Uncertainty range: 0.5 % - 5.0 % Osmolality: 0 mosmol/kg -2000 mosmol/kg; Uncertainty range: 0.5 % - 2.0 % Refractive index (RI) 1.32999 - 1.65999 Uncertainty range: 0.00005 – 0.00050 Sugar content 0.01 °Brix – 60.00 °Brix Uncertainty range: 0.01 °Brix – 0.05 °Brix pH meter; Primary measurement method- harned cell Conductivity meter Titrimetry Density meter Titrimetry TOC analyzer UV/VIS Karl Fischer coulometric titrator Turbidimeter Titrimetry; UV/VIS Gravimetry; UV/VIS Osmometer Refractormeter Refractormeter

(A2LA Cert No. 7668.01) 07/13/2026 Page 3 of 4 Certified Reference Material/ Matrix or Artifact Property Value(s)/ Property Identity/ Range/ Uncertainty Approach Used to Assign Property Values High Purity Inorganic Compounds: • Metals • Salts Purity: 1 % w/w – 100 % w/w; Uncertainty range: 0.001 % w/w -1.0 % w/w ICP OES/ICP MS Ion chromatography Karl Fischer coulometric titrator High Purity Organic Compounds: • Alcohols • Carbonyls and Derivatives • Carbamates • Conazoles • Heterocyclic Compounds • Hydrocarbons • Notrogen Containing Organic Compounds • Organic Acids • Organochlorine Pesticides • Phenoles • Phenoxyacetates • Phosphorus Containing Organic Compounds • Phthalates • Polyaromatric Hydrocarbons (PAHs) • Polybrominated/Polychlorinat ed Biphenyls (PBBS and PCBs) • Pyrethroids • Synthetic Oils • Triazines • Volatile Organic Compounds Purity: 1 % w/w – 100 % w/w; Uncertainty range: 0.1 % w/w -5.0 % w/w HPLC/HPLC-MS GC/MS Karl Fischer coulometric titrator qNMR Solution for Determination of Density: • Density Density: 0.655 g/cm 3 - 2.000 g/cm3; Uncertainty range: 0.00010 g/cm3 – 0.00050 g/cm3 Density meter

(A2LA Cert No. 7668.01) 07/13/2026 Page 4 of 4 Certified Reference Material/ Matrix or Artifact Property Value(s)/ Property Identity/ Range/ Uncertainty Approach Used to Assign Property Values Solutions for Determination of Physical Properties of Petroleum Products: • Cold Filter Plugging Point (CFPP) • Pour Point • Viscosity • Distillation • Flash Point • Cloud Point Temperature: -1°C to – 40 °C; Uncertainty range: 1.0 % - 3.0 % Viscosity: 0.5mm 2/s to 50mm2/s; Uncertainty range: 0.2 % - 1.0 % Temperature: 30°C to 400 °C; Uncertainty range: 0.2 % - 2.0 % Temperature: 40°C to 200 °C; Uncertainty range: 0.2 % - 2.0 % Temperature: -1°C to – 30 °C; Uncertainty range: 1.0 % - 3.0 % Cold filter plugging point analyzer Pour point analyzer Viscometer Automatic distiller Flash point analyzer Cloud point analyzer