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

A18722 Potassium dichromate, 99%

Numéro CAS
7778-50-9
Synonymes
Potassium bichromate

Dimensions Prix ($) Quantité Disponibilité
500g 37,98
2500g 150,30
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Potassium dichromate, 99%

MDL
MFCD00011367
EINECS
231-906-6

Propriétés chimiques

Formule
Cr2K2O7
Poids formulaire
294.18
Point de fusion
398°
Densité
2.676
Solubilité
Soluble in water. Insoluble in alcohol.

Applications

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.

Notes

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

Références bibliographiques

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.

Mentions de danger et de prudence du SGH

Mentions de danger (UE): H272-H301-H330-H312-H317-H334-H340-H350-H360-H372-H314-H400-H410

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

Mentions de prudence: P221-P210-P301+P310-P303+P361+P353-P304+P340-P305+P351+P338-P320-P330-P405-P501a

Take any precaution to avoid mixing with combustibles. Keep away from heat/sparks/open flames/hot surfaces. - No smoking. IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. 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). Rinse mouth. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Autres références

Merck
14,7627
Classe de danger
5.1
Groupe d'emballage
II
Code tarifaire harmonisé
2841.50
TSCA
Yes
RTECS
HX7680000

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Analytique et matériel de laboratoire