398136 Sigma-Aldrich


ACS reagent, ≥99.0%

Synonym: 2-Aminoethanol, 2-Aminoethyl alcohol, ETA, MEA 90, MEA-LCI, MEA, Monoethanolamine

  • CAS Number 141-43-5

  • Linear Formula NH2CH2CH2OH

  • Molecular Weight 61.08

  •  Beilstein/REAXYS Number 505944

  •  EC Number 205-483-3

  •  MDL number MFCD00008183

  •  PubChem Substance ID 24864720

  •  NACRES NA.21



Related Categories Amino Alcohols, Building Blocks, Cell Biology, Chemical Synthesis, Glycerophospholipid Metabolism,
Quality Level   200
grade   ACS reagent
vapor density   2.1 (vs air)
vapor pressure   0.2 mmHg ( 20 °C)
assay   ≥99.0%
autoignition temp.   1436 °F
expl. lim.   17 %
impurities   ≤0.30% water
color   APHA: ≤15
refractive index   n20/D 1.454 (lit.)
bp   170 °C (lit.)
  69-70 °C/10 mmHg
mp   10-11 °C (lit.)
solubility   water: miscible 1000 g/L at 20 °C
density   1.012 g/mL at 25 °C (lit.)
cation traces   Fe: ≤5 ppm
  heavy metals: ≤5 ppm (by ICP)
SMILES string   NCCO
InChI   1S/C2H7NO/c3-1-2-4/h4H,1-3H2


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.


2.5 L in glass bottle

25, 500 mL in glass bottle

Safety & Documentation

Safety Information

Signal word 
Target organs 
Respiratory system
UN 2491 8 / PGIII
WGK Germany 
Flash Point(F) 
195.8 °F - Pensky-Martens closed cup
Flash Point(C) 
91 °C - Pensky-Martens closed cup


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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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?
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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.
What is the Molarity of Product 398136,Ethanolamine?
The Molarity of Product 398136,Ethanolamine, is 16.6 M.
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Protocols & Articles


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...
Keywords: Mass spectrometry, Metabolites

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