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

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).

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

Frequently Bought Together

Chloroform ≥98% stabilised, TECHNICAL

: VWR Chemicals

1-Butanol ≥98.5%, GPR RECTAPUR®

: VWR Chemicals

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

: VWR Chemicals

Water, HiPerSolv CHROMANORM® for HPLC

: VWR Chemicals

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

: VWR Chemicals

Paraffin, liquid, liquid Ph. Eur.

: VWR Chemicals

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

: VWR Chemicals

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

: VWR Chemicals

n-Heptane ≥99%, GPR RECTAPUR®

: VWR Chemicals

N-Ethyldiisopropylamine 99+%

: Thermo Fisher Scientific

Pyridine ≥99%

: Thermo Fisher Scientific

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

: Thermo Fisher Scientific

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

: Thermo Fisher Scientific