Калий Натрий tartrate четырехводный
Калий Натрий tartrate четырехводный атрибут
| Температура плавления: |
70-80 °C |
| Температура кипения: |
220°C |
| альфа: |
22.1 º (c=10, water) |
| плотность: |
1.05 g/mL at 20 °C |
| показатель преломления: |
22 ° (C=10, H2O) |
| температура хранения: |
Store at +5°C to +30°C. |
| растворимость: |
H2O: 1 M при 20 b0;C, прозрачный, бесцветный |
| форма: |
Твердый |
| цвет: |
Белый полупрозрачный |
| Водородный показатель: |
6.0 - 8.5 |
| Запах: |
Без запаха |
| РН: |
7.0-8.5 (25℃, 50mg/mL in H2O) |
| оптическая активность: |
[α]20/D +28.0 to +30.0° |
| Растворимость в воде: |
630 г/л (20°С) |
| λмакс: |
λ: 260 nm Amax: 0.026
λ: 280 nm Amax: 0.022 |
| Мерк: |
14,7670 |
| БРН: |
6113568 |
| LogP: |
-1.426 (est) |
| Справочник по базе данных CAS: |
6381-59-5(CAS DataBase Reference) |
| Рейтинг продуктов питания EWG: |
1 |
| FDA UNII: |
QH257BPV3J |
| Справочник по химии NIST: |
Sodium potassium tartrate tetrahydrate(6381-59-5) |
Калий Натрий tartrate четырехводный химические свойства, назначение, производство
Химические свойства
white semi-transparent crystals
Использование
Potassium sodium tartrate tetrahydrate has been used in the preparation of Lowry reagent for the determination of microsomal protein concentration in rat hepatic microsomes by Lowry method. It may be used as a constituent to prepare DNS (3,5- dinitrosalicylic acid) reagent and Fehling′s solution B, which are used in the determination of reducing sugar.
Подготовка
Potassium sodium tartrate tetrahydrate is obtained by the follow steps:The starting material is tartar with a minimum tartaric acid content 68 %. This is first dissolved in water or in the mother liquor of a previous batch. It is then basified with hot saturated sodium hydroxide solution to pH 8, decolorized with activated charcoal, and chemically purified before being filtered. The filtrate is evaporated to 42 °Bé at 100 °C, and passed to granulators in which Seignette's salt crystallizes on slow cooling. The salt is separated from the mother liquor by centrifugation, accompanied by washing of the granules.
Общее описание
Potassium sodium tartrate tetrahydrate is a ferroelectric crystal with a high piezoelectric effect and electromechanical coupling coefficient.
Методы очистки
Recrystallise it from distilled water (solubility: 0.4mL/g at 100o, 0.7mL/g at 14o). [Beilstein 3 IV 1223.]
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