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/418/501/product-dating-information-06-25-mk.pdf
C4261
Coumarin
≥99% (HPLC)
Sinónimos:
1,2-Benzopyrone, 1-Benzopyran-2-one, 2H-Chromen-2-one
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| A ustedes/SKU | Disponibilidad | Precio |
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Acerca de este artículo
vapor pressure
0.01 mmHg ( 47 °C)
Quality Segment
assay
≥99% (HPLC)
form
powder
bp
298 °C (lit.)
mp
68-73 °C (lit.)
SMILES string
O=C1Oc2ccccc2C=C1
InChI
1S/C9H6O2/c10-9-6-5-7-3-1-2-4-8(7)11-9/h1-6H
InChI key
ZYGHJZDHTFUPRJ-UHFFFAOYSA-N
Gene Information
rat ... Maoa(29253), Maob(25750)
Application
1 of 1
Este artículo | |||
|---|---|---|---|
| assay ≥99% (HPLC) | assay - | assay ≥98.0% (HPLC) | assay - |
| bp 298 °C (lit.) | bp 298 °C (lit.) | bp 298 °C (lit.) | bp 298 °C (lit.) |
| mp 68-73 °C (lit.) | mp 68-73 °C (lit.) | mp 68-73 °C (lit.) | mp 68-73 °C (lit.) |
| Gene Information rat ... Maoa(29253), Maob(25750) | Gene Information - | Gene Information - | Gene Information - |
| form powder | form - | form flakes | form - |
| Quality Level 200 | Quality Level - | Quality Level - | Quality Level - |
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signalword
Danger
hcodes
Hazard Classifications
Acute Tox. 3 Dermal - Acute Tox. 3 Oral - Skin Sens. 1
Clase de almacenamiento
6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
wgk
WGK 1
flash_point_f
323.6 °F - closed cup
flash_point_c
162 °C - closed cup
ppe
dust mask type N95 (US), Eyeshields, Faceshields, Gloves
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How can I determine the shelf life / expiration / retest date of this product?
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Dear Merck team, we would like to know the quantum yield of this product - coumarin C4261. Do you have information about this? Thank you in advance
1 answer-
Unfortunately, no quality testing is carried out to determine the quantum yield of the 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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