Reference materials, acid number standards, total acid number (TAN)

About this item

Acid number reference materials are intended for use in the determination of acid number (AN) in petroleum products in accordance with ASTM D664/IP 177 (by potentiometric titration) or ASTM D974 (by colour-indicator titration).

Certifications: GMP/GLP, ISO 9001, ISO/IEC 17025 and ISO/IEC 17043 certified.

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Tetrahydrofuran ≥99.5% (by anhydrous basis) stabilised, AnalaR NORMAPUR® Reag. Ph. Eur., ACS analytical reagent

Supplier: VWR Chemicals

Water, HiPerSolv CHROMANORM® for HPLC

Supplier: VWR Chemicals

2-Propanol, anhydrous (max. 0.003% H₂O) ≥99.8%

Supplier: VWR Chemicals

Dichloromethane ≥99.9% (by GC) stabilised, Suprasolv® hypergrade for organic trace analysis, Supelco®

Supplier: Merck

Chloroform ≥98% stabilised, TECHNICAL

Supplier: VWR Chemicals

1-Butanol ≥98.5%, GPR RECTAPUR®

Supplier: VWR Chemicals

Methanol ≥99.8%, AnalaR NORMAPUR® Reag. Ph. Eur., ACS analytical reagent

Supplier: VWR Chemicals

Paraffin, liquid, liquid Ph. Eur.

Supplier: VWR Chemicals

2-Propanol, SupraSolv® for gas chromatography, Supelco®

Supplier: Merck

Tetramethylammonium sulphate ≥99.0% (by titrimetric analysis), powder, LiChropur™ for ion pair chromatography, Supelco®

Supplier: Merck

Water, CHROMASOLV™ for LC-MS, Riedel-de Haën™

Supplier: Honeywell Chemicals

n-Heptane ≥99%, GPR RECTAPUR®

Supplier: VWR Chemicals

N-Ethyldiisopropylamine 99+%

Supplier: Thermo Fisher Scientific

Tetrahydrofuran, extra dry over Molecular Sieve 99.5% stabilised, AcroSeal®

Supplier: Thermo Fisher Scientific

Ethanol absolute ≥99.9% (by GC), SPECTRONORM® for spectroscopy

Supplier: VWR Chemicals

N,N-Dimethylformamide, extra dry over Molecular Sieve 99.8%, AcroSeal®

Supplier: Thermo Fisher Scientific

Pyridine ≥99%

Supplier: Thermo Fisher Scientific