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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
194905
12-Crown-4
98%
Synonym(s):
1,4,7,10-Tetraoxacyclododecane
Select a Size
| Pack Size | SKU | Availability | Price |
|---|---|---|---|
| 1 g | Available to ship TODAYfromMILWAUKEE | $70.00 | |
| 5 g | Available to ship TODAYfromMILWAUKEE | $163.00 |
About This Item
$70.00
Available to ship TODAYDetails
Quality Segment
assay
98%
form
liquid
reaction suitability
core: crown ether
refractive index
n20/D 1.463 (lit.)
bp
61-70 °C/0.5 mmHg (lit.)
mp
16 °C (lit.)
density
1.089 g/mL at 25 °C (lit.)
functional group
ether
SMILES string
C1COCCOCCOCCO1
InChI
1S/C8H16O4/c1-2-10-5-6-12-8-7-11-4-3-9-1/h1-8H2
InChI key
XQQZRZQVBFHBHL-UHFFFAOYSA-N
General description
Application
- A promoter in the synthesis of poly(diethylsiloxane) (PDES) from monomer hexaethylcyclotrisiloxane using NaOH as a catalyst via anionic ring-opening polymerization.
- As an additive in the preparation of triarylmethane derivatives by palladium-catalyzed cross coupling reaction of aryl bromides with diarylmethane derivatives.
- A phase transfer catalyst in organic synthesis.
signalword
Danger
hcodes
Hazard Classifications
Acute Tox. 1 Inhalation
Storage Class
6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
wgk
WGK 3
flash_point_f
235.4 °F - closed cup
flash_point_c
113 °C - closed cup
ppe
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
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Articles
Crown ethers and cryptands, complexing agents able to selectively bind metal cations, are vital for diverse synthesis and analytical applications.
Related Content
Global Trade Item Number
| SKU | GTIN |
|---|---|
| 194905-5G | 04061838761378 |
| 194905-1G | 04061838096395 |
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How can I determine the shelf life / expiration / retest date of this product?
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Regarding product 194905- 12-Crown-4. I received the product in liquid form, as mentioned. I want to know in which liquid the 12-Crown-4 is dissolved.Is it in any solvent or water?
1 answer-
This compound is a neat or pure liquid with a melting point of 16 °C. The product has not been diluted in any solvent or buffer.
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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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