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ACS reagent, ≥99.0%

Monoethanolamine, 2-Aminoethyl alcohol, MEA, 2-Aminoethanol, MEA 90, ETA, MEA-LCI
Linear Formula:
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level


ACS reagent

vapor density

2.1 (vs air)

vapor pressure

0.2 mmHg ( 20 °C)



autoignition temp.

1436 °F

expl. lim.

17 %


≤0.30% water


APHA: ≤15

refractive index

n20/D 1.454 (lit.)


170 °C (lit.)
69-70 °C/10 mmHg


10-11 °C (lit.)


water: miscible 1000 g/L at 20 °C


1.012 g/mL at 25 °C (lit.)

cation traces

Fe: ≤5 ppm
heavy metals: ≤5 ppm (by ICP)

SMILES string




InChI key


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General description

Ethanolamine (Etn) is an amino alcohol. It contains both alcohol and amine functional group. Conformational studies of Etn have been reported. The decomposition of ethanolamine in aqueous medium by ozonization has been studied.


Ethanolamine may be used as the following:
  • Plasticizer in the synthesis of ethanolamine plasticized thermoplastic starch (ETPS).
  • Hydroxyl radical scavenger.
  • Blocking agent during genosensor development.


25, 500 mL in glass bottle
2.5 L in glass bottle


CorrosionExclamation mark

Signal Word


Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Aquatic Chronic 3 - Eye Dam. 1 - Skin Corr. 1B - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

8A - Combustible, corrosive hazardous materials



Flash Point(F)

195.8 °F - Pensky-Martens closed cup

Flash Point(C)

91 °C - Pensky-Martens closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Certificate of Origin

  1. 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.

  2. 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.

  3. 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.

  4. 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.

  5. 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. 

  6. What is the Molarity of Product 398136, Ethanolamine?

    The Molarity of Product 398136, Ethanolamine, is 16.6 M. 

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

    Ask a Scientist here.

Ethanolamine as a novel plasticiser for thermoplastic starch.
Huang M, et al.
Polymer Degradation and Stability, 90(3), 501-507 (2005)
Alcohols and ethanolamines as hydroxyl radical scavengers.
Billany MR, et al.
International Journal of Pharmaceutics, 137(2), 143-147 (1996)
An iridium oxide nanoparticle and polythionine thin film based platform for sensitive Leishmania DNA detection.
Mayorga-Martinez CC, et al.
Journal of Material Chemistry B: Materials for Biology and Medicine, 3(26), 5166-5171 (2015)
Ethanolamine: conformational diversity.
Novakovskaya YV and Rodnikova MN.
Structural Chemistry, 26(1), 177-187 (2015)
Ozonization of ethanolamine in aqueous medium.
Parisheva Z and Demirev A.
Water Research, 34(4), 1340-1344 (2000)

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