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207802

Sigma-Aldrich

Potassium dichromate

ACS reagent, ≥99.0%

동의어(들):

Potassium bichromate

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크기 선택

100 G
₩165,750
500 G
₩244,108

₩165,750

예상 입고일2025년 2월 17일세부사항

벌크 견적 요청
모든 사진(3)

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보기 변경
100 G
₩165,750
500 G
₩244,108

About This Item

Linear Formula:
K2Cr2O7
CAS Number:
7778-50-9
Molecular Weight:
294.18
EC Number:
231-906-6
MDL number:
MFCD00011367
UNSPSC 코드:
12352302
PubChem Substance ID:
329752023
NACRES:
NB.24
분석:
≥99.0%
Grade:
ACS reagent
양식:
crystals

₩165,750

예상 입고일2025년 2월 17일세부사항

벌크 견적 요청

Grade

ACS reagent

Quality Level

200

분석

≥99.0%

양식

crystals

반응 적합성

reagent type: oxidant

불순물

≤0.005% insolubles

손실

≤0.05% loss on drying

pH

3.5-5.0 (25 °C, 29.4 g/L)

mp

398 °C (lit.)

음이온 미량물

chloride (Cl-): ≤0.001%
sulfate (SO42-): ≤0.005%

양이온 미량물

Ca: ≤0.003%
Na: ≤0.001%
Na: ≤0.02%
heavy metals (as Pb): ≤5 ppm

SMILES string

[K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O

InChI

1S/2Cr.2K.7O/q;;2*+1;;;;;;2*-1

InChI key

KMUONIBRACKNSN-UHFFFAOYSA-N

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일반 설명

Potassium dichromate is a red-orange colored solid. Its crystals belong to the triclinic crystal system. On heating above 600°C, it decomposes to give oxygen, potassium chromate and chromium(III) oxide. It acts as a strong oxidizing agent in acidic media. It can be synthesized by the fusion of chromium(III) oxide with potassium carbonate and nitrate or oxygen.[1]

애플리케이션

Potassium dichromate may be used in the preparation of hybride polymer-clay nanocomposite supported dichromate reagents.[2] It may also be used as an oxidant for the selective oxidation of primary and secondary alcohol to corresponding aldehydes and ketones, respectively.[3]

신호어

Danger

Hazard Classifications

Acute Tox. 2 Inhalation - Acute Tox. 3 Oral - Acute Tox. 4 Dermal - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B - Eye Dam. 1 - Muta. 1B - Ox. Sol. 2 - Repr. 1B - Resp. Sens. 1 - Skin Corr. 1B - Skin Sens. 1 - STOT RE 1 Inhalation - STOT SE 3

표적 기관

Cardio-vascular system, Respiratory system

Storage Class Code

5.1B - Oxidizing hazardous materials

WGK

WGK 3

Flash Point (°F)

Not applicable

Flash Point (°C)

Not applicable

가장 최신 버전 중 하나를 선택하세요:

시험 성적서(COA)

Lot/Batch Number
MKCW0639
MKCV6315
MKCW6784
MKCT4740
MKCS3074

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이미 열람한 고객

Slide 1 of 1

1 of 1

Sodium dichromate dihydrate ACS reagent, ≥99.5%

Sigma-Aldrich

398063

Sodium dichromate dihydrate

Selective solvent-free oxidation of alcohols with potassium dichromate
Lou J-D and Xu Z-N
Tetrahedron Letters, 43(49), 8843-8844 (2002)
Synthesis and application of polymer-clay nanocomposite-supported dichromate oxidizing agent.
El-Hamshary H, et al.
Polymer Composites, 36(11), 2066-2075 (2015)
Nicholas James Strausfeld et al.
eLife, 9 (2020-03-04)
Descriptions of crustacean brains have focused mainly on three highly derived lineages of malacostracans: the reptantian infraorders represented by spiny lobsters, lobsters, and crayfish. Those descriptions advocate the view that dome- or cap-like neuropils, referred to as 'hemiellipsoid bodies,' are
Marcel E Sayre et al.
The Journal of comparative neurology, 527(14), 2371-2387 (2019-03-13)
Paired centers in the forebrain of insects, called the mushroom bodies, have become the most investigated brain region of any invertebrate due to novel genetic strategies that relate unique morphological attributes of these centers to their functional roles in learning
Bruno Pinto et al.
Neuron, 108(5), 887-904 (2020-10-08)
Microglia are brain-resident immune cells and regulate mechanisms essential for cognitive functions. Down syndrome (DS), the most frequent cause of genetic intellectual disability, is caused by a supernumerary chromosome 21, containing also genes related to the immune system. In the
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  1. How can I determine the shelf life / expiration / retest date of this product?

    1 답변

    1. 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

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 답변

    1. 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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