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
225770
Lithium bis(trimethylsilyl)amide solution
1.0 M in THF
Synonym(s):
Hexamethyldisilazane lithium salt
About This Item
Recommended Products
form
liquid
Quality Level
concentration
1.0 M in THF
density
0.891 g/mL at 25 °C
SMILES string
[Li]N([Si](C)(C)C)[Si](C)(C)C
InChI
1S/C6H18NSi2.Li/c1-8(2,3)7-9(4,5)6;/h1-6H3;/q-1;+1
InChI key
YNESATAKKCNGOF-UHFFFAOYSA-N
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General description
Application
- To catalyze polymerization reaction in the synthesis of poly(p-benzamide)s. [1]
- In the synthesis of cyclic poly(α-peptoid)s and α-(difluoromethyl)styrene. [2]
- In directed aldol condensations and Darzens condensation reactions; α-arylation of aryl ester derivatives and allylic amination reaction.
- For the generation of kinetic enolates than sodium hexamethyldisilazide (NaHMDS) because the enolates produced are more regiostable than those produced with NaHMDS.
Packaging
Legal Information
recommended
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Carc. 2 - Eye Dam. 1 - Flam. Liq. 2 - Skin Corr. 1B - STOT SE 3
Target Organs
Central nervous system, Respiratory system
Supplementary Hazards
Storage Class Code
3 - Flammable liquids
WGK
WGK 2
Flash Point(F)
1.4 °F - closed cup
Flash Point(C)
-17 °C - closed cup
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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?
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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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Is methanol employed in the production process of the Lithium bis(trimethylsilyl)amide solution, product number 225770?
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Methanol is not used in the synthesis of product no. 225770 Lithium bis(trimethylsilyl)amide solution. Methanol residue is highly unlikely to be present.
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