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Nitriles, nitro and azo compounds

Ethyl acetohydroximate

Also known as Ethyl N-hydroxyethanimidate, Ethanimidic acid, N-hydroxy-, ethyl ester, Ethyl N-hydroxyacetimidate

CAS 20703-42-8Formula C4H9NO2Molar mass 103.12 g/molEC 234-165-7
GHS signal word: Warning. Pictograms: Flammable, Harmful or irritant
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Ethyl acetohydroximate chemical structure, C4H9NO2, CAS 20703-42-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
20703-42-8
Formula
C4H9NO2
Molar mass
103.12 g/mol
Physical form
Liquid
HS code
292800
Category
Nitriles, nitro and azo compounds
Illustrative photo, 200 litre blue HDPE drums of liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Ethyl acetohydroximate?

Plain description, key identifiers and synonyms

Ethyl acetohydroximate is a chemical substance with the molecular formula C4H9NO2 and a molar mass of 103.12 g/mol. Its CAS registry number is 20703-42-8. The IUPAC name is ethyl N-hydroxyethanimidate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
ethyl N-hydroxyethanimidate
CAS number
20703-42-8Other or deprecated CAS: 10576-12-2
EC number
234-165-7
Molecular formula
C4H9NO2
UNII
PHX9UH9AV1
InChIKey
QWKAVVNRCKPKNM-UHFFFAOYSA-N
InChI
InChI=1S/C4H9NO2/c1-3-7-4(2)5-6/h6H,3H2,1-2H3
SMILES (canonical and isomeric)
CCOC(=NO)C

Synonyms

  • Ethyl N-hydroxyethanimidate
  • Ethanimidic acid, N-hydroxy-, ethyl ester
  • Ethyl N-hydroxyacetimidate
  • N-Hydroxyethanimidic acid, ethyl ester
  • (E)-Ethyl N-hydroxyacetimidate
  • (Z)-Ethyl N-hydroxyacetimidate
  • N-Hydroxyacetimidic Acid Ethyl Ester
  • ethyl-N-hydroxyacetimidate
  • Ethyl acetate, oxime
  • ethyl N-hydroxyethaneimidoate
  • Acetohydroximic acid, ethyl ester

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Physical form
Liquidexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
103.12 g/molcalc.
Exact mass
103.0633 Dacalc.
LogP (octanol/water)
0.83calc.
Topological polar surface area
41.82 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
1calc.
Heavy atoms
7calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.75calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS02: Flammable
Flammable
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H226Flammable liquid and vapour.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (25)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Ethyl acetohydroximate suppliers

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Ethyl acetohydroximate price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Ethyl acetohydroximate is traded under.

HS 2928.00Indicative HS code

Organic derivatives of hydrazine or of hydroxylamine

World exports in 2024
$1.38B
−9.0% vs 2023, imports $1.52B
2019 to 2024
Top exporters
  1. Switzerland * partner reported44.0%
  2. China18.4%
  3. Italy9.4%
Top importers
  1. Brazil21.8%
  2. United States12.8%
  3. Italy10.8%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Ethyl acetohydroximate is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Ethyl acetohydroximate, based on the data on this page

What is Ethyl acetohydroximate?

Ethyl acetohydroximate is a chemical substance with the molecular formula C4H9NO2 and a molar mass of 103.12 g/mol. Its CAS registry number is 20703-42-8. The IUPAC name is ethyl N-hydroxyethanimidate.

What is the CAS number of Ethyl acetohydroximate?

The CAS registry number of Ethyl acetohydroximate is 20703-42-8. Other or deprecated CAS numbers: 10576-12-2.

What is the molecular formula and weight of Ethyl acetohydroximate?

The molecular formula of Ethyl acetohydroximate is C4H9NO2 and its molar mass is 103.12 g/mol.

What is Ethyl acetohydroximate used for?

Known uses and roles of Ethyl acetohydroximate include building blocks in research and laboratory.

Is Ethyl acetohydroximate hazardous?

Ethyl acetohydroximate carries the GHS signal word "Warning". Main hazards: flammable liquid and vapour, causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Ethyl acetohydroximate?

Ethyl acetohydroximate is usually classified under HS code 292800 (Organic derivatives of hydrazine or of hydroxylamine). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Ethyl acetohydroximate?

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What is the price of Ethyl acetohydroximate?

Suppliers quote Ethyl acetohydroximate on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Ethyl acetohydroximate

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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