A7257 Sigma


≥98%, crystalline

Synonym: (R)-4-(2-Amino-1-hydroxyethyl)-1,2-benzenediol, L-Arterenol, L-Noradrenaline, Levarterenol



Related Categories Adrenergics, Adrenergics - Agonists, Agonists, Bioactive Small Molecule Alphabetical Index, Bioactive Small Molecules,
assay   ≥98%
form   crystalline
color   off-white to tan
storage temp.   −20°C
Gene Information   human ... ADRA2A(150), ADRA2B(151), ADRA2C(152)
rat ... Adra1a(29412), Adra1d(29413), Adra2a(25083), Adrb1(24925), Adrb2(24176), Drd1a(24316), Drd2(24318)


Biochem/physiol Actions

Adrenergic neurotransmitter


1, 5 g in poly bottle

500 mg in poly bottle


Norepinephrine is an adrenergic neurotransmitter used in the treatment of hypotension, depression, schizophrenia, and attention deficit/hyperactivity disorders.

Features and Benefits

This compound is a featured product for Neuroscience research. Click here to discover more featured Neuroscience products. Learn more about bioactive small molecules for other areas of research at

Price and Availability

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Safety & Documentation

Safety Information

GHS06  GHS06
Signal word 
Hazard statements 
Precautionary statements 
UN 2811 6.1 / PGII
WGK Germany 


Certificate of Analysis

Certificate of Origin

Frequently Asked Questions

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. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option:
How should Product A7257, (−)-Norepinephrine, be dissolved?
This product is soluble in 0.5M HCl at a concentration of 50mg/mL, yielding a clear faint yellow solution.
What are the differences between Product No. A7257, (−)-Norepinephrine and Product No. A0937, (±)-Norepinephrine (+)-bitartrate salt?
Product No. A7257, is the free base form of the (-) isomer; it is not water soluble. Product No. A0937 is the bitartrate salt of the racemic (+/-) mixture; it is soluble in water at a concentration of 50 mg/mL.
How long is a solution of Product A7257, (−)-Norepinephrine, stable?
A stock solution of 1 mg/ml or greater may be stored frozen in aliquots. Avoid freeze-thaw cycles. When the solution gets a pink cast, the product has degraded.
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 or view 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, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
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Protocols & Articles


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MSMLS Online Plate Map

Metabolite descriptors included with the software download upon purchase of the product include: Name, Parent CID, molecular formula, molecular weight, CAS, ChEBI, HMDB ID, PubChem Compound and Subst...
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Peer-Reviewed Papers


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