1.09114

Potassium hydroxide solution in ethanol

c(KOH) = 0.5 mol/l (0.5 N), Titripur^®, reag. Ph. Eur.

• UNSPSC 코드: 12352305

속성

• Agency: reag. Ph. Eur.
• Quality Level: 200
• vapor pressure: 59 hPa ( 20 °C)
• 제품 라인: Titripur^®
• 형태: liquid
• autoignition temp.: 425 °C (ethanol)
• 품질: Analyzed in our ISO 17025 accredited QC lab
• expl. lim.: 3.5-15.0 % (v/v) ethanol)
• 반응 적합성: reaction type: Acid-base reactions
• 농도: 0.5 M
• 기술: titration: suitable
• pH: 14 (20 °C in H₂O)
• bp: 78.3 °C/1013 hPa (ethanol)
• mp: -114.5 °C (ethanol)
• 전이 온도: flash point 12 °C (ethanol)
• density: 0.85 g/cm³ at 20 °C
• 저장 온도: 15-25°C

설명

애플리케이션

• Voltammetric Determination: Potassium hydroxide solution in ethanol is used in voltammetric determination of antioxidants in various matrices. A recent study demonstrated its application in the voltammetric determination of the antioxidant 2,6-di-tert-butyl-p-cresol (T501) in transformer oil using a graphite electrode. This method enhances the sensitivity and accuracy of antioxidant detection, crucial for ensuring the stability and performance of oils and other industrial fluids (Zhou et al., Analytical Letters, 2021).

특징 및 장점

Accreditation:
This volumetric solution is analyzed by our calibration laboratory D-K-15185-01-00 which is accredited according to DIN EN ISO/IEC 17025 for analysis of amount-of-substance concentrations in volumetric solutions by DAkkS (Deutsche Akkreditierungsstelle - German National Accreditation Body). The accreditation certificate can be found at www.sigmaaldrich.com/ISO17025.

포장

SKU-pack size numbers ending with a "3" are SmartChemicals with an RFID tag on the label for seamless data transfer to the instrument, e.g. xxxxxx1003 or xxxxxxx 4003. More information on www.sigmaaldrich.com/SmartChemicals

분석 메모

Form liquid
Amount-of-substance concentration 0.4975 - 0.5025 mol/L
Measurement uncertainty ± 0.0015 mol/L
Traceability NIST SRM

The concentration is determined by volumetric titration and refers to 20°C.
The amount-of-substance concentration of this volumetric solution is traceable to a primary standard reference material (SRM) from the National Institute of Standards and Technology, Gaithersburg, USA (NIST SRM 350 benzoic acid) by means of volumetric standard benzoic acid (article number 1.02401), certified reference material according to ISO 17034, analyzed by our accredited calibration laboratory of Merck KGaA, Darmstadt, Germany according to DIN EN ISO/IEC 17025. The uncertainty is expressed as expanded measurement uncertainty with a coverage factor k=2 covering a confidence level of 95%.

Note: The titer is a correction factor to correct for variations of the volumetric solution, the titration equipment, the temperature and other laboratory conditions. For correct titration results it is recommended to determine a titer with the laboratory specific equipment and under laboratory specific conditions directly after opening a new bottle and at regular time intervals.

법적 정보

Titripur is a registered trademark of Merck KGaA, Darmstadt, Germany

안전성 정보

• 픽토그램: GHS02,GHS05
• 신호어: Danger
• 유해 및 위험 성명서: H225 - H290 - H314
• 예방조치 성명서: P210 - P233 - P234 - P280 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Eye Dam. 1 - Flam. Liq. 2 - Met. Corr. 1 - Skin Corr. 1B
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 1
• Flash Point (°F): 53.6 °F - (ethanol)
• Flash Point (°C): 12 °C - (ethanol)