Name | Chromium(III) sulfate hydrate |
Synonyms | C.I. 77305 CHROMAL(TM) CHROME SULFATE CHROMIC SULFATE Chromic sulfate Chromium sulfate CHROMIUM SULFATE CHROMIC SULPHATE CHROMIUM SULPHATE CHROMIUM(+3)SULFATE chromium(2+) sulfate CHROMIUM(III) SULFATE Chromium(III) sulfate Chromium(III) sulfate hydrate trichromic disulfate hexahydrate |
CAS | 10101-53-8 10031-37-5 |
EINECS | 233-253-2 |
InChI | InChI=1/Cr.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+3;/p-2 |
Molecular Formula | Cr2O12S3 |
Molar Mass | 392.18 |
Density | 3.012 |
Melting Point | 90℃ |
Boling Point | 330℃ at 760mmHg |
Water Solubility | insoluble H2O, acids [MER06] |
Appearance | Crystalline |
Storage Condition | Room Temprature |
Stability | Stable. |
Sensitive | Easily absorbing moisture |
MDL | MFCD00016039 |
Physical and Chemical Properties | Chromium sulfate is an inorganic compound with the chemical formula Cr2(SO4)3. Chromium sulfate hydrate often exists in the form of [Cr(H2O)6]3, which appears purple in appearance, and the aqueous solution turns green by heating. ①cr2 (SO4)3=392.18, purple powder, relative density 3.01. ② Cr2(SO4)3 · 6H2O = 500.25, dark green crystal. ③ Cr2(SO4)3 · 15H2O = 662.41, purple scale crystal. The relative density of 1.87(17/4 deg C), heat to 100 deg C lost very daughter crystal water. ④ Cr2(SO4)3 · 18H2O = 716.45, blue-purple cubic crystal. A relative density of 1.70(22/4 °c), with loss of 12 molecules of crystal water at 100 °c. Soluble in water, slightly soluble in ethanol. after reacting chromium hydroxide with sulfuric acid, it is obtained by natural evaporation and crystallization. chromium sulfate is widely used as mordant for tanning or textile, and in the preparation of chrome alum. It is also used as an analytical reagent, a mordant, and a raw material for making green inks, green paints, ceramic glazes, and other chromium salts, such as chromium trioxide. |
Use | For printing, ceramics, leather and other industries |
Safety Description | S24/25 - Avoid contact with skin and eyes. |
UN IDs | UN 9100 |
Toxicity | MLD in frogs, mice, rabbits (mg/kg): 37, 246.8, 215 i.v. (Cavalli) |
Raw Materials | Sulfuric acid Sodium Dichromate |