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Merck 822184 Tween® 20 Tween 500 Ml
Merck 822184 Tween® 20 for synthesis. CAS 9005-64-5, pH 6 - 8 (50 g/l, H₂O, 20 °C).
CAS #: 9005-64-5
EC Numarası: 500-018-3
Molar Kütle: 1228 g/mol
Tepe Formülü: C₅₈H₁₁₄O₂₆
Katalog No: 105560.0001
Marka: Merck
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15 gün iade garantisi.
Açıklama | |
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Katalog Numarası | 105560 |
Replaces | 5560-4; 5560 |
Genel Bakış | RP modified plates serve two purposes: act as a pilot method for HPLC and allow to choose various solvent system for special separations. Our RP-modified silica layers are well suited for many separation challenges that unmodified silica cannot overcome. These layers use aqueous solvent systems to separate extremely non-polar substances and analyze particular polar substances that can adapt to ion-pair chromatography. What’s more, RP-modified silica layers are less dependent on atmospheric humidity. Unlike unmodified silica, RP-phases do not exhibit catalytic activity. This makes them the plates of choice for unstable substance that tend to experience oxidative degradation. |
Ürün Bilgisi | |
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HS Kodu | 3822 19 00 |
Quality Level | MQ100 |
Özellikler | |
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Specific surface area (according to BET; 5-Pt. measurement) | 480 - 540 m²/g |
Pore volume (N₂-isotherm) | 0.74 - 0.84 ml/g |
d 50 (laser diffraction, size distribution) | 9.5 - 11.5 µm |
Layer thickness | 150 - 200 µm |
Deviation of layer thickness per plate | ≤ 30 µm |
Chromatographic testings: A) Cholesterin test | |
hRf-values - cholesterin, cholesterin test | 28 - 36 |
B) Steroid test | |
- methyltestosterone, steroid test | 16 - 26 |
- Reichstein S, steroid test | 30 - 40 |
- hydrocortisone, steroid test | 42 - 52 |
Typical value determined on an activated sheet (120°C, 15 min) Eluent a) aceton/ water (95/5 v/v) Eluent b) aceton/ water (60/40 v/v) |