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7788-99-0

Chromium potassium sulfate dodecahydrate, also known as potassium chromium(III) sulfate dodecahydrate or Chrome alum, is a deep violet-red crystalline solid. It is synthesized by reacting sulfur dioxide with potassium dichromate, which is dissolved in sulfuric acid at -38°C. Chromium potassium sulfate dodecahydrate is widely used in various industries, particularly in dyeing and textile.

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  • 7788-99-0 Structure

  • Basic information

    1. Product Name: Chromium potassium sulfate dodecahydrate
    2. Synonyms: chromicpotassiumsulfatedodecahydrate;chromicpotassiumsulfatedodecahydrate(chromealum);Chromium(III)potassiumsulfate(1:1:2),dodecahydrate;potassiumchromiumalumdodecahydrate;Potassiumchromiumsulfate,doe;Chromium(Ⅲ) potassium sulfate dodecahydrate;chromic alum;potassium chrome alum
    3. CAS NO:7788-99-0
    4. Molecular Formula: CrH24KO20S2
    5. Molecular Weight: 499.4
    6. EINECS: 233-401-6
    7. Product Categories: N/A
    8. Mol File: 7788-99-0.mol

  • Chemical Properties

    1. Melting Point: 89 °C(lit.)
    2. Boiling Point: 330 °C at 760 mmHg
    3. Flash Point: N/A
    4. Appearance: Violet/Solid
    5. Density: 1.83
    6. Refractive Index: N/A
    7. Storage Temp.: Store at +15°C to +25°C.
    8. Solubility: water: soluble(lit.)
    9. Water Solubility: 24 g/100 mL (15 ºC)
    10. Stability: Stable. Incompatible with magnesium, aluminium.
    11. Merck: 14,2229
    12. CAS DataBase Reference: Chromium potassium sulfate dodecahydrate(CAS DataBase Reference)
    13. NIST Chemistry Reference: Chromium potassium sulfate dodecahydrate(7788-99-0)
    14. EPA Substance Registry System: Chromium potassium sulfate dodecahydrate(7788-99-0)

  • Safety Data

    1. Hazard Codes: Xi
    2. Statements: 36/38
    3. Safety Statements: 22-24/25-37/39-26
    4. WGK Germany: 2
    5. RTECS: GB6850000
    6. TSCA: Yes
    7. HazardClass: N/A
    8. PackingGroup: N/A
    9. Hazardous Substances Data: 7788-99-0(Hazardous Substances Data)

7788-99-0 Usage

Uses

1. Used in Analytical Chemistry:
Chromium potassium sulfate dodecahydrate is used as a reagent for the preparation of chromium standard solutions, which are essential for the accurate measurement and analysis of chromium concentrations in various samples.
2. Used in Material Synthesis:
In the field of material science, chromium potassium sulfate dodecahydrate is utilized in the method for synthesizing metal-organic terephthalate structure MIL-101 (Cr). This structure has potential applications in gas storage and catalysis.
3. Used in Gelatin Dissolution:
Chromium(III) potassium sulfate dodecahydrate has been employed for the dissolution of gelatin in various studies. This property makes it a valuable compound in the research and development of new materials and processes involving gelatin.
4. Used in Solar Energy Applications:
Chromium potassium sulfate dodecahydrate may be used as a starting material in the synthesis of quasi-monodisperse spherical core-shell particles of Cr/α-Cr2O3. These particles have potential applications as solar absorbers, contributing to the development of more efficient solar energy technologies.
5. Used in Dyeing and Textile Industry:
As a widely used chemical in the dyeing and textile industry, chromium potassium sulfate dodecahydrate plays a crucial role in the production of various colored fabrics and textiles. Its unique properties enable it to produce vibrant and long-lasting colors in a range of materials.

Purification Methods

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

Check Digit Verification of cas no

The CAS Registry Mumber 7788-99-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,8 and 8 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 7788-99:
(6*7)+(5*7)+(4*8)+(3*8)+(2*9)+(1*9)=160
160 % 10 = 0
So 7788-99-0 is a valid CAS Registry Number.
InChI:InChI=1/2Cr.2K.4H2O4S.24H2O/c;;;;4*1-5(2,3)4;;;;;;;;;;;;;;;;;;;;;;;;/h;;;;4*(H2,1,2,3,4);24*1H2/q2*+3;2*+1;;;;;;;;;;;;;;;;;;;;;;;;;;;;/p-8

7788-99-0 Well-known Company Product Price

  • Brand
  • (Code)Product description
  • CAS number
  • Packaging
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  • Detail

  • Alfa Aesar

  • (A11816)  Chromium(III) potassium sulfate dodecahydrate, 98%   

  • 7788-99-0

  • 100g

  • 255.0CNY

  • Detail

  • Alfa Aesar

  • (A11816)  Chromium(III) potassium sulfate dodecahydrate, 98%   

  • 7788-99-0

  • 500g

  • 463.0CNY

  • Detail

  • Alfa Aesar

  • (A11816)  Chromium(III) potassium sulfate dodecahydrate, 98%   

  • 7788-99-0

  • 2500g

  • 1960.0CNY

  • Detail

  • Alfa Aesar

  • (44083)  Chromium(III) potassium sulfate dodecahydrate, 99.9% (metals basis)   

  • 7788-99-0

  • 25g

  • 535.0CNY

  • Detail

  • Alfa Aesar

  • (44083)  Chromium(III) potassium sulfate dodecahydrate, 99.9% (metals basis)   

  • 7788-99-0

  • 100g

  • 1576.0CNY

  • Detail

  • Alfa Aesar

  • (44083)  Chromium(III) potassium sulfate dodecahydrate, 99.9% (metals basis)   

  • 7788-99-0

  • 500g

  • 6073.0CNY

  • Detail

  • Alfa Aesar

  • (36715)  Chromium(III) potassium sulfate dodecahydrate, ACS, 98.0-102.0%   

  • 7788-99-0

  • 100g

  • 313.0CNY

  • Detail

  • Alfa Aesar

  • (36715)  Chromium(III) potassium sulfate dodecahydrate, ACS, 98.0-102.0%   

  • 7788-99-0

  • 500g

  • 953.0CNY

  • Detail

  • Sigma-Aldrich

  • (243361)  Chromium(III)potassiumsulfatedodecahydrate  ACS reagent, ≥98%

  • 7788-99-0

  • 243361-5G

  • 552.24CNY

  • Detail

  • Sigma-Aldrich

  • (243361)  Chromium(III)potassiumsulfatedodecahydrate  ACS reagent, ≥98%

  • 7788-99-0

  • 243361-100G

  • 718.38CNY

  • Detail

  • Sigma-Aldrich

  • (243361)  Chromium(III)potassiumsulfatedodecahydrate  ACS reagent, ≥98%

  • 7788-99-0

  • 243361-500G

  • 2,760.03CNY

  • Detail

  • Sigma-Aldrich

  • (60151)  Chromium(III)potassiumsulfatedodecahydrate  puriss. p.a., ACS reagent, ≥99.0% (RT)

  • 7788-99-0

  • 60151-500G

  • 2,393.82CNY

  • Detail

7788-99-0SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 17, 2017

Revision Date: Aug 17, 2017

1.Identification

1.1 GHS Product identifier

Product name Chromium potassium sulfate dodecahydrate

1.2 Other means of identification

Product number -
Other names potassium,chromium(3+),disulfate,dodecahydrate

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:7788-99-0 SDS

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