Chromium potassium sulfate dodecahydrate Chemical Properties

Melting point:

89 °C(lit.)

Density 

1.83

bulk density

800-1000kg/m3

storage temp. 

Store at +15°C to +25°C.

solubility 

water: soluble(lit.)

form 

Solid

color 

Violet

PH

3 (50g/l, H2O, 20℃)

Odor

Odorless

Water Solubility 

24 g/100 mL (15 ºC)

Merck 

14,2229

Exposure limits

NIOSH: IDLH 25 mg/m3; TWA 0.5 mg/m3

Stability:

Stable. Incompatible with magnesium, aluminium.

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 Information

Hazard Codes 

Xi

Risk Statements 

36/38

Safety Statements 

22-24/25-37/39-26

WGK Germany 

2

RTECS 

GB6850000

TSCA 

Yes

HS Code 

28332990

Storage Class

11 - Combustible Solids

Hazard Classifications

Eye Irrit. 2
Skin Irrit. 2

MSDS

• Language:English Provider:Chromium(III) potassium sulfate
• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Chromium potassium sulfate dodecahydrate Usage And Synthesis

Chemical Properties

deep violet-red crystals

Uses

Chromium potassium sulfate dodecahydrate is used in method for synthesizing metal-organic terephthalate structure MIL-101 (Cr).

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 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 than 80??C. After the reaction, it is left to crystallize slowly, and after centrifugal separation of the mother liquor, the crystals are washed with a small amount of cold water, and then dried at a low temperature to produce the finished product of chromium potassium sulfate. The reaction formula is as follows:

2K2Cr2O7+8H2SO4+40H2O+3C??4KCr(SO4)2-21H2O+3CO2??

Purification Methods

Crystallise it from hot water (2mL/g) by cooling.

Chromium potassium sulfate dodecahydrate (7788-99-0)Related Product Information

• Chloral hydrate
• Potassium sulfate
• Potassium persulfate
• Potassium sorbate
• Chromic sulfate
• Potassium Acetate
• Basic chromic sulfate
• Chromium
• Losartan potassium
• Potassium iodide
• Potassium chloride
• Potassium fluoride dihydrate
• sulfate
• Chromic nitrate
• CHROMIUM POTASSIUM SULFATE
• Hydrazinium hydroxide solution
• Hydrazine hydrate
• Potassium