≥98%, crystalline

L-Noradrenaline, L-Arterenol, Levarterenol, (R)-4-(2-Amino-1-hydroxyethyl)-1,2-benzenediol
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
EC Number:
MDL number:
PubChem Substance ID:
Pricing and availability is not currently available.

Quality Level






off-white to tan

storage temp.


SMILES string




InChI key


Gene Information

human ... ADRA1A(148), ADRA1B(147), ADRA1D(146), ADRA2A(150), ADRA2B(151), ADRA2C(152), ADRB1(153), ADRB2(154), ADRB3(155)
rat ... Adra1a(29412), Adra1d(29413), Adra2a(25083), Adrb1(24925), Adrb2(24176), Drd1a(24316), Drd2(24318)

Looking for similar products? Visit Product Comparison Guide


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


500 mg in poly bottle
1, 5 g in poly bottle

Biochem/physiol Actions

Adrenergic neurotransmitter

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 sigma.com/discover-bsm.


Skull and crossbones

Signal Word


Hazard Statements

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Hazard Codes


Risk Statement


Safety Statement



UN 2811 6.1 / PGII

WGK Germany


Certificate of Analysis
Certificate of Origin
  1. 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.

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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.

  7. 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. 

  8. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

  9. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

Eliyahu Dremencov et al.
Current drug targets, 10(11), 1061-1068 (2009-08-26)
There are numerous lines of evidence pointing to norepinephrine being of crucial importance in pathophysiology of anxiety and mood disorders. First, norepinephrine projections innervate the limbic system, suggesting the involvement of norepinephrine in the regulation of emotions and cognition. Second...
Mostafa El Mansari et al.
CNS neuroscience & therapeutics, 16(3), e1-17 (2010-04-22)
Central dopaminergic and noradrenergic systems play essential roles in controlling several forebrain functions. Consequently, perturbations of these neurotransmissions may contribute to the pathophysiology of neuropsychiatric disorders. For many years, there was a focus on the serotonin (5-HT) system because of...
Daina Economidou et al.
Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, 37(9), 2057-2066 (2012-04-19)
Impulsive behavior is a hallmark of several neuropsychiatric disorders (eg, attention-deficit/hyperactivity disorder, ADHD). Although dopamine (DA) and norepinephrine (NE) have a significant role in the modulation of impulsivity their neural loci of action is not well understood. Here, we investigated...
Kelly Del Tredici et al.
Journal of neurology, neurosurgery, and psychiatry, 84(7), 774-783 (2012-10-16)
Although resting tremor, cogwheel rigidity, hypokinesia/bradykinesia and postural instability usually dominate the clinical picture of sporadic Parkinson's disease (PD), both clinical and epidemiological data reveal that a wide variety of additional symptoms impair patients' quality of life considerably, parallel to...
Filip A Paczkowski et al.
The Journal of biological chemistry, 282(24), 17837-17844 (2007-04-13)
Monoamine neurotransmitter transporters for norepinephrine (NE), dopamine and serotonin are important targets for antidepressants and analgesics. The conopeptide chi-MrIA is a noncompetitive and highly selective inhibitor of the NE transporter (NET) and is being developed as a novel intrathecal analgesic....
LC/MS/MS Analysis of Epinephrine, Metanephrine and Metabolites on Ascentis® Express OH5
Read More
Related Content
DISCOVER Bioactive Small Molecules for Neuroscience
Read More

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service

Social Media

LinkedIn icon
Twitter icon
Facebook Icon
Instagram Icon


Research. Development. Production.

We are a leading supplier to the global Life Science industry with solutions and services for research, biotechnology development and production, and pharmaceutical drug therapy development and production.

© 2021 Merck KGaA, Darmstadt, Germany and/or its affiliates. All Rights Reserved.

Reproduction of any materials from the site is strictly forbidden without permission.