1.09114

Potassium hydroxide solution in ethanol

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

• UNSPSCコード: 12352305

特性

• 認証: reag. Ph. Eur.
• 品質水準: 200
• 蒸気圧: 59 hPa ( 20 °C)
• 製品種目: Titripur^®
• 形状: liquid
• 自己発火温度: 425 °C (ethanol)
• 品質: Analyzed in our ISO 17025 accredited QC lab
• expl. lim.: 3.5-15.0 % (v/v) ethanol)
• 反応適合性: reaction type: Acid-base reactions
• 濃度: 0.5 M
• テクニック: titration: suitable
• pH: 14 (20 °C in H₂O)
• bp: 78.3 °C/1013 hPa (ethanol)
• mp: -114.5 °C (ethanol)
• 転移温度: flash point 12 °C (ethanol)
• 密度: 0.85 g/cm³ at 20 °C
• 保管温度: 15-25°C

詳細

アプリケーション

• 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).

特徴および利点

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.

包装

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

アナリシスノート

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.

法的情報

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

安全性情報

• ピクトグラム: GHS02,GHS05
• シグナルワード: Danger
• 危険有害性情報: H225 - H290 - H314
• 注意書き: P210 - P233 - P234 - P280 - P303 + P361 + P353 - P305 + P351 + P338
• 危険有害性の分類: Eye Dam. 1 - Flam. Liq. 2 - Met. Corr. 1 - Skin Corr. 1B
• 保管分類コード: 3 - Flammable liquids
• WGK: WGK 1
• 引火点(°F): 53.6 °F - (ethanol)
• 引火点(℃): 12 °C - (ethanol)