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230499

Sigma-Aldrich

Selenourea

98%

Synonym(s):

2-Selenourea, Carbamimidoselenoic acid, Isoselenourea, Selenouronium

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About This Item

Linear Formula:
NH2CSeNH2
CAS Number:
630-10-4
Molecular Weight:
123.02
Beilstein:
1734744
EC Number:
211-129-9
MDL number:
MFCD00008065
UNSPSC Code:
12352100
PubChem Substance ID:
24853808
NACRES:
NA.22
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Assay

98%

form

solid

mp

210-215 °C (dec.)

functional group

amine

SMILES string

NC(N)=[Se]

InChI

1S/CH4N2Se/c2-1(3)4/h(H4,2,3,4)

InChI key

IYKVLICPFCEZOF-UHFFFAOYSA-N

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Application

Selenourea [(SeC(NH2)2)] has been used as a selenium (Se) precursor for the insertion of Se into protein crystals.[1]
It can also be used as a reagent to synthesize:
  • Selenazoles from α -bromo ketones presence of β -cyclodextrin.[2]
  • Symmetrical diaryl selenides by C-Se cross coupling reaction in presence of coper oxide nanaoparticles as a catalyst.[3]
  • CdSe nanocrystals.[4]

Signal Word

Danger

Hazard Statements

H300,H331,H373,H410

Hazard Classifications

Acute Tox. 2 Oral - Acute Tox. 3 Inhalation - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2

Storage Class Code

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCL9168
BCCK4577
BCCJ5328
BCCG5429
BCCF7366

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A novel synthesis of CdSe nanocrystals
Epifani M, et al.
Materials Letters, 58(19), 2429-2432 (2004)
Sung Min Kwon et al.
Science advances, 4(4), eaap9104-eaap9104 (2018-04-18)
We report a general strategy for obtaining high-quality, large-area metal-chalcogenide semiconductor films from precursors combining chelated metal salts with chalcoureas or chalcoamides. Using conventional organic solvents, such precursors enable the expeditious formation of chalco-gels, which are easily transformed into the
B Mishra et al.
The journal of physical chemistry. A, 110(5), 1894-1900 (2006-02-03)
Pulse radiolysis coupled with absorption detection has been employed to study one-electron oxidation of selenomethionine (SeM), selenocystine (SeCys), methyl selenocysteine (MeSeCys), and selenourea (SeU) in aqueous solutions. Hydroxyl radicals (*OH) in the pH range from 1 to 7 and specific
B Mishra et al.
The journal of physical chemistry. B, 109(26), 12718-12723 (2006-07-21)
Reactions of biological oxidizing agents, such as hydroxyl radicals ((*)OH), singlet oxygen ((1)O(2)), hydrogen peroxide (H(2)O(2)), and peroxynitrite (ONOO(-)) with selenourea were studied. The kinetics of the reactions was followed using time-resolved techniques, and the bimolecular rate constants were determined.
Cristina Trujillo et al.
The journal of physical chemistry. B, 112(17), 5479-5486 (2008-04-09)
The gas-phase reactions between Ca(2+) and selenourea were investigated by means of electrospray/tandem mass spectrometry techniques. The MS/MS spectra of [Ca(selenourea)](2+) complexes show intense peaks at m/z 43, 121, 124, and 146 and assigned to monocations produced in different coulomb
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    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?

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    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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