МОНОГИДРАТ СУЛЬФАТА МАРГАНЦА
МОНОГИДРАТ СУЛЬФАТА МАРГАНЦА атрибут
| Температура плавления: |
700 °C |
| Температура кипения: |
850 °C |
| плотность: |
2.95 |
| температура хранения: |
Store at +15°C to +25°C. |
| растворимость: |
5-10 г/100 мл при 21°C |
| форма: |
Твердый |
| цвет: |
Розовый |
| РН: |
3.0-3.5 (50g/l, H2O, 20℃) |
| Растворимость в воде: |
5-10 г/100 мл при 21 °C |
| Чувствительный: |
Hygroscopic |
| Мерк: |
14,5739 |
| Пределы воздействия: |
ACGIH: TWA 0.02 mg/m3; TWA 0.1 mg/m3
OSHA: Ceiling 5 mg/m3
NIOSH: IDLH 500 mg/m3; TWA 1 mg/m3; STEL 3 mg/m3 |
| ИнЧИКей: |
ISPYRSDWRDQNSW-UHFFFAOYSA-L |
| LogP: |
-1.031 (est) |
| Справочник по базе данных CAS: |
10034-96-5(CAS DataBase Reference) |
| FDA 21 CFR: |
184.1461; 582.5461; 582.80 |
| Вещества, добавляемые в пищу (ранее EAFUS): |
MANGANESE SULFATE |
| Рейтинг продуктов питания EWG: |
3 |
| FDA UNII: |
W00LYS4T26 |
| Система регистрации веществ EPA: |
Manganese(II) sulfate monohydrate (10034-96-5) |
МОНОГИДРАТ СУЛЬФАТА МАРГАНЦА химические свойства, назначение, производство
Химические свойства
Pale pink crystalline powder, slightly hygroscopic
Использование
Manganese sulfate monohydrate is used to produce manganese by an electrolytic process. The compound is used for dyeing textiles; for producing red glazes on porcelain; in varnish driers; in fertilizers; and in animal feeds to provide manganese as an essential trace element.
Подготовка
Manganese(II) sulfate is prepared by prolonged heating of any manganese salt with concentrated sulfuric acid. The compound is produced commercially from pyrolusite (MnO2) or rhodochrosite (MnCO3). Either mineral is dissolved in sulfuric acid and the solution evaporated:
MnO2 + H2SO4 → MnSO4 + H2O + ½ O2
Alternatively, manganese dioxide is heated strongly with dehydrated iron(II) sulfate:
2MnO2 + 2FeSO4 → 2MnSO4 + Fe2O3 + ½ O2
Manganese(II) sulfate, prepared by methods involving evaporation of manganese salt with sulfuric acid, is the tetrahydrate, MnSO4•4H2O. The tetrahydrate on gentle heating produces monohydrate, MnSO4•H2O.
Also, manganese(II) sulfate is a by-product in the manufacture of hydroquinone. The process involves reaction of aniline with manganese dioxide in sulfuric acid, followed by the removal of quinone by steam distillation under vacuum.
2C6H5NH2 (aniline) + 5H2SO4 + 4MnO2 → 2C6H4O2 + 4MnSO4 + 2C6H4O2 + 4MnSO4(quinone)
The unreacted acid is neutralized by lime, treated with water, and the solution filtered to separate any excess MnO2 and insoluble residues. Evaporation of the filtrate yields a crude product containing about 80% MnSO4 and 15% (NH4)2SO4.
Manganese(II) sulfate also may be produced by the action of sulfur dioxide with manganese dioxide:
MnO2 + SO2 → MnSO4
Общее описание
Odorless pale red slightly efflorescent crystals or light pink powder. pH (5% solution) 3.7.
Реакции воздуха и воды
Water soluble. Hygroscopic.
Профиль реактивности
Manganese(II) sulfate hydrate is incompatible with aluminum and magnesium.
Пожароопасность
Flash point data for Manganese(II) sulfate hydrate are not available; however, Manganese(II) sulfate hydrate is probably combustible.
Методы очистки
Crystallise it from water (0.9mL/g) at 54-55o by evaporating about two-thirds of the water. It dehydrates above 400o.
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