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
128465
Glyoxal solution
40 wt. % in H2O
Sinônimo(s):
Ethanedial, Oxalaldehyde
About This Item
Produtos recomendados
densidade de vapor
>1 (vs air)
Nível de qualidade
pressão de vapor
18 mmHg ( 20 °C)
Formulário
liquid
temperatura de autoignição
545 °F
concentração
40 wt. % in H2O
índice de refração
n20/D 1.4087
solubilidade
water: soluble(lit.)
densidade
1.265 g/mL at 25 °C
grupo funcional
aldehyde
cadeia de caracteres SMILES
[H]C(=O)C([H])=O
InChI
1S/C2H2O2/c3-1-2-4/h1-2H
chave InChI
LEQAOMBKQFMDFZ-UHFFFAOYSA-N
Procurando produtos similares? Visita Guia de comparação de produtos
Descrição geral
Aplicação
Outras notas
Atenção
Palavra indicadora
Danger
Frases de perigo
Declarações de precaução
Classificações de perigo
Eye Dam. 1 - Muta. 2 - Skin Corr. 1 - Skin Sens. 1 - STOT SE 3
Órgãos-alvo
Respiratory system
Código de classe de armazenamento
8A - Combustible corrosive hazardous materials
Classe de risco de água (WGK)
WGK 1
Ponto de fulgor (°F)
Not applicable
Ponto de fulgor (°C)
Not applicable
Equipamento de proteção individual
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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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What are the storage conditions of the 100G package size supplied in a single 125 mL bottle?
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This product may be stored at room temperature. Note that any precipitates that may appear upon long term storage may be dissolved by warming the material to 50-60 °C.
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Would the Glyoxal in this solution be stable if added to an Ethanol water mixture (50-75%) and stored for a prolonged period of time?
1 answer-
Stability/shelf life information for Product 128465 dissolved in ethanol is unavailable.
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Hello, for the Glyoxal solution 40% (128465) it is described "This form of glyoxal is composed of 3 moles of glyoxal and 2 moles of water..." What does it mean? If glyoxal solution is 40% the molar ratio glyoxal:water should be 1:5. Best regards Maja
1 answer-
Product 128465 concentration is ~40% wt % in H2O which is 40 g of solid divided by 100 g of water and ~8.8 M (Moles/L). Please be mindful that the moles represent a different unit of measurement than weight percent and molarity and their ratios will vary as moles do not represent the concentration of the solution. A mole is defined as the amount of a substance that contains exactly 6.0221023 elementary entities of the given substance. 2 moles of water molecules are needed to stabilize 3 moles of glyoxal molecules as pure glyoxal is not commonly encountered since solid glyoxal around room temperature is a yellow liquid that gives off a green vapor. Commercially, it is usually handled as a 40% aqueous solution (density near 1.24 g/mL).
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Hello, Is there a straightforward way to get this solution of glyoxal into the gas phase so that it can be introduced into an atmospheric simulation chamber for the purpose of testing developmental gas sensing systems? Kind regards, Eibhlín
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Information regarding the vapor pressure of the glyoxal cannot be provided. The conditions required for volatilization are unknown. It may be possible to begin by making an aerosol, using a bottle-type sprayer, see Product Z126306-1SET for example:
https://www.sigmaaldrich.com/product/aldrich/z126306To further discuss, we kindly ask you to navigate to the link https://www.sigmaaldrich.com/techservice and click on "Product Technical Inquires" under the Products Section with all the required information so that a member of our Technical Service team can reach out to you to assist further. Thank you.
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Hi! We want to buy 100g, but we were wondering if all the volume comes togheter in a big vial, or is it individual vials? thanks!
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The 100G package size is supplied in a single 125 mL bottle.
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