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7778-50-9 - Potassium dichromate, 99% - Potassium bichromate - A18722 - Alfa Aesar

A18722 Potassium dichromate, 99%

CAS-Nummer
7778-50-9
Synonyme
Potassium bichromate

Größe Preis ($) Menge Verfügbarkeit
500g 43,70
2500g 169,00
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Potassium dichromate, 99%

MDL
MFCD00011367
EINECS
231-906-6

Chemische Eigenschaften

Formel
Cr2K2O7
Molmasse
294.18
Schmelzpunkt
398°
Dichte
2.676
Löslichkeit
Soluble in water. Insoluble in alcohol.

Anwendungen

Potassium dichromate is most often used as an oxidizing agent in laboratories and industries. It is used as a precursor to prepare potassium chrome alum which finds application in leather finishing and tanning. It is utilized in the preparation of chromic acid for cleaning glassware and etching materials. It is an active ingredient in cement used for retards setting and improves its density and texture. Furthermore, it is used in photography and in photographic screen printing. It is also used in wet test analysis as an analytical lab reagent and in ethanol determination.

Bemerkungen

Incompatible with strong oxidizing agents, reducing agents, strong bases, organic materials, acids, powdered metals, acid anhydrides and hydrazine.

Literaturverweise

Optimal conditions have been determined for the oxidation of enamines to ketones in a biphasic ether-water solvent system: Tetrahedron Lett., 36, 2921 (1995).

Can be used catalytically in comblnation with Sodium percarbonate, A16045, as the stoichiometric oxidant under phase transfer conditions, for the oxidation of secondary alcohols to ketones: Synth. Commun., 25, 2349 (1995).

Asakai, T.; Hioki, A. Reliability in standardization of sodium thiosulfate with potassium dichromate. Microchem. J. 2015, 123, 9-14.

Cheng, Z.; Liu, P.; Guo, B.; Qiu, Y.; Xu, P.; Fan, H. Surface Activation of Carbon Paper with Potassium Dichromate Lotion and Application as a Supercapacitor. Appl. Surf. Sci. 2015, 349, 833-838.

GHS Gefahren- und Sicherheitshinweise

Gefahrenhinweise (EU): H272-H301-H312-H330-H314-H334-H317-H340-H350-H360-H372

May intensify fire; oxidizer. Toxic if swallowed. Harmful in contact with skin. Fatal if inhaled. Causes severe skin burns and eye damage. May cause allergy or asthma symptoms or breathing difficulties if inhaled. May cause an allergic skin reaction. May cause genetic defects. May cause cancer. May damage fertility or the unborn child. Causes damage to organs through prolonged or repeated exposure.

Sicherheitshinweise: P221-P301+P310a-P303+P361+P353-P304+P340-P305+P351+P338-P320-P405-P501a

Take any precaution to avoid mixing with combustibles. IF SWALLOWED: IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Specific treatment is urgent (see label). Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Weitere Referenzen

Merck
14,7627
Gefahrenklasse
5.1
Verpackungsgruppe
II
Harmonized Tariff Code
2841.50
TSCA
Yes
RTECS
HX7680000

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