If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf
216615
Potassium chromate
ACS reagent, ≥99.0%
About This Item
Productos recomendados
grade
ACS reagent
Quality Level
vapor density
6.7 (vs air)
assay
≥99.0%
form
crystals
impurities
≤0.005% insolubles
pH
8.6-9.8 (25 °C, 5%)
mp
971 °C (lit.)
anion traces
chloride (Cl-): ≤0.005%
sulfate (SO42-): ≤0.03%
cation traces
Ca: ≤0.005%
Na: ≤0.02%
SMILES string
[K+].[K+].[O-][Cr]([O-])(=O)=O
InChI
1S/Cr.2K.4O/q;2*+1;;;2*-1
InChI key
XMXNVYPJWBTAHN-UHFFFAOYSA-N
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General description
Application
- In the conversion of primary and secondary alcohol into aldehydes and ketones using tetrabutylammonium hydrogen sulfate catalyst.
Potassium chromate is also used:
- To prepare magnetoactive compound by reacting with iron(II) sulfate.
- As a reagent in the conversion primary allylic and benzylic halides to aldehydes.
signalword
Danger
Hazard Classifications
Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B Inhalation - Eye Irrit. 2 - Muta. 1B - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3
target_organs
Respiratory system
Storage Class
6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
wgk_germany
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
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How is shipping temperature determined? And how is it related to the product storage temperature?
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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