| Identification | More | [Name]
Chromium potassium sulfate dodecahydrate | [CAS]
7788-99-0 | [Synonyms]
ALUM CHROME
CHROME ALUM
CHROME ALUM, DODECAHYDRATE
CHROMIC POTASSIUM SULPHATE
CHROMIC POTASSIUM SULPHATE 12-HYDRATE
CHROMIC POTASSIUM SULPHATE DODECAHYDRATE
CHROMIUM(+3)POTASSIUM SULFATE 12-WATER
CHROMIUM(III) POTASSIUM SULFATE
CHROMIUM (III) POTASSIUM SULFATE 12-WATER
CHROMIUM(III) POTASSIUM SULFATE DODECAHYDRATE
CHROMIUM(III) POTASSIUM SULPHATE 12-HYDRATE
CHROMIUM(III) POTASSIUM SULPHATE DODECAHYDRATE
CHROMIUM POTASSIUM SULFATE
CHROMIUM POTASSIUM SULFATE 12 H2O
CHROMIUM POTASSIUM SULFATE, 12-HYDRATE
CHROMIUM POTASSIUM SULFATE DODECAHYDRATE
CHROMIUM POTASSIUM SULFATE, HYDROUS
POTASSIUM CHROMIUM(+3)SULFATE 12-WATER
POTASSIUM CHROMIUM ALUM
POTASSIUM CHROMIUM(III) SULFATE | [EINECS(EC#)]
233-401-6 | [Molecular Formula]
CrH24KO20S2 | [MDL Number]
MFCD00149917 | [Molecular Weight]
499.4 | [MOL File]
7788-99-0.mol |
| Chemical Properties | Back Directory | [Appearance]
deep violet-red crystals | [Melting point ]
89 °C(lit.) | [bulk density]
800-1000kg/m3 | [density ]
1.83
| [storage temp. ]
Store at +15°C to +25°C. | [solubility ]
water: soluble(lit.) | [form ]
Solid | [color ]
Violet | [Odor]
Odorless | [PH]
3 (50g/l, H2O, 20℃) | [Stability:]
Stable. Incompatible with magnesium, aluminium. | [Water Solubility ]
24 g/100 mL (15 ºC) | [Merck ]
14,2229 | [Exposure limits]
NIOSH: IDLH 25 mg/m3; TWA 0.5 mg/m3 | [InChI]
InChI=1S/Cr.K.H2O4S.H2O.H/c;;1-5(2,3)4;;/h;;(H2,1,2,3,4);1H2; | [InChIKey]
WAYJJQPENBTMDM-UHFFFAOYSA-N | [SMILES]
S(O)(O)(=O)=O.[Cr].[KH].O | [CAS DataBase Reference]
7788-99-0(CAS DataBase Reference) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/38:Irritating to eyes and skin . | [Safety Statements ]
S22:Do not breathe dust .
S24/25:Avoid contact with skin and eyes .
S37/39:Wear suitable gloves and eye/face protection .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . | [WGK Germany ]
2
| [RTECS ]
GB6850000
| [TSCA ]
Yes | [HS Code ]
28332990 | [Storage Class]
11 - Combustible Solids | [Hazard Classifications]
Eye Irrit. 2
Skin Irrit. 2 |
| Hazard Information | Back Directory | [Chemical Properties]
deep violet-red crystals | [Uses]
Chromium(III) potassium sulfate dodecahydrate [KCr(SO4)2.12H2O] has been used for the dissolution of gelatin in various studies.
It may be used as a starting material in the synthesis of quasi-monodisperse spherical core-shell particles of Cr/α-Cr2O3 to be used as solar absorbers. | [Uses]
Chromium potassium sulfate dodecahydrate is used in method for synthesizing metal-organic terephthalate structure MIL-101 (Cr). | [Uses]
Chromium potassium sulfate dodecahydrate is used in preparation of chromium standard solutions.
| [General Description]
Chromium(III) potassium sulfate dodecahydrate (Potassium chromium(III) sulfate dodecahydrate, Chrome alum) is a violet colored solid. It has been synthesized by reacting sulfur dioxide with potassium dichromate (diisolved in sulfuric acid) at -38°C. It is widely used chemical in dyeing and textile industry. | [reaction suitability]
reagent type: catalyst
core: chromium | [Synthesis]
After dissolving 98% potassium dichromate and 98% sulfuric acid in the mother liquor of chromium alum according to the theoretical amount, wood chips were added slowly under stirring for reduction. The reaction temperature is controlled at not more tha | [Purification Methods]
Crystallise it from hot water (2mL/g) by cooling. |
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