In the current study, besides the above-mentioned substances, we found more important allergens, including colophony, potassium dichromate
, nickel, cobalt, and chrome, which could be derived from sources such as metal tools, dyeing agents, and leather materials in the workplace.
Pycnogenol(r) prevents potassium dichromate
(K2Cr2O7)-induced oxidative damage and nephrotoxicity in rats.
Maximum light fastness of 5 Blue Wool Standard was exhibited by alkanet dyed sample with a combination of pre- mordanting potassium dichromate
; post-mordanting ferric chloride; and post-treated Albafix WFF, Dicrylan, UV-SUN and Rayosan.
The present work intends to study the kinetics of the oxidative chemical polymerization of o-phenylenediamine in aqueous HCl medium and potassium dichromate
is a widely used chemical for oxidation reactions in undergraduate chemistry teaching labs.
The reaction was stopped by the addition of 2.0 mL of dichromate-acetic acid reagent 5% potassium dichromate
and glacial acetic acid was mixed in 1:3 ratios.
Chromium in the hexavalent state (Cr VI) is a human carcinogen (as in the orange colored potassium dichromate
or bi-chromate) while trivalent chromium (Cr III) (as in the green colored chromium III chloride) appears not to be.
In the past, we would place liquid mercury in a watch glass and mix in a solution of dilute nitric acid and potassium dichromate
. This mixture caused the mercury to move in a manner roughly resembling an Amoeba.
A sample containing <25 mg C (total sample mass ranged from ~0.02 g for graphite to ~1.0 g for dolomite) was placed into a 250-mL conical flask; 10mL of IN potassium dichromate
was added and allowed to react for 30 min, followed by rapid addition, while swirling, of 20 mL 98% sulfuric acid.
The oxidizable substances in the test sample volume are oxidized by a known quantity of potassium dichromate
in the presence of mercuric sulfate and silver catalyst in an environment of concentrated sulfuric acid in a defined time interval.
solution was diluted with the growth media (SDA) to obtain varying concentrations from 0.5% up to 3.0 % and 0 % served as control.
Ten nauplii added in 3 mL of ASW was used as a negative control while potassium dichromate
was used as positive control during the experiment.