L7757 Sigma



Synonym: 2-Diethylamino-N-(2,6-dimethylphenyl)acetamide, Lignocaine, Xylocaine




25, 100 g in poly bottle

Biochem/physiol Actions

Na+ channel blocker; class IB antiarrhythmic that is rapidly absorbed after parenteral administration.

Safety & Documentation

Safety Information

GHS07  GHS07
Signal word 
Hazard statements 
Personal Protective Equipment 
NONH for all modes of transport
WGK Germany 


Certificate of Analysis

Certificate of Origin

Frequently Asked Questions

How does the storage temperature relate to shipping conditions?
The storage conditions that a Sigma-Aldrich catalog and label recommend for products are deliberately conservative. For many products, long-term storage at low temperatures will increase the time during which they are expected to remain in specification and therefore are labeled accordingly. Where short-term storage, shipping time frame, or exposure to conditions other than those recommended for long-term storage will not affect product quality, Sigma-Aldrich will ship at ambient temperature. The products sensitive to short-term exposure to conditions other than their recommended long-term storage are shipped on wet or dry ice. Ambient temperature shipping helps to control shipping costs for our customers. At any time, our customers can request wet- or dry-ice shipment, but the special handling is at customer expense if our product history indicates that the product is stable for regular shipment. See Shipping and Storage for more information.
Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
How do I get lot-specific information or a Certificate of Analysis?
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
How do I find price and availability?
There are several ways to find pricing and availability for our products.Once you log onto our website, you will find the price and availability displayed on the product detail page.You can contact any of our Customer Sales and Service offices to receive a quote. USA customers: 1-800-325-3010 orview local office numbers.
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
How do I dissolve lidocaine free base (Product No. L7757)?
The product is soluble in alcohol, ether, benzene, chloroform and oils, according to The Merck Index , 14th ed. online(2006).Lidocaine hydrochloride monohydrate (Product No. L5647) is soluble in water.Since the lidocaine hydrochloride is so much more soluble than lidocaine free base, lowering the pH to that of the hydrochloride (pH 4.0-5.5) or to that of injectable forms (pH 5.0-7.0) should greatly enhance the solubility of L7757.
IsProduct L7757, Lidocaine free base, suitable for use as a reference standard?
No. We would recommend Product No. L1026 (Lidocaine, Sigma References Standard). The current lot is current with USP 31, 2nd Supplement, and is traceable to USP Reference Standard lot MOF220.
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