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2-Cyanoethyl acetoacetate

2-Cyanoethyl acetoacetate is a pharmaceutical impurity.
2-Cyanoethyl acetoacetate
2-Cyanoethyl acetoacetate Chemical Structure CAS No.: 65193-87-5
Product category: Drug Intermediate
This product is for research use only, not for human use. We do not sell to patients.
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Product Description
2-Cyanoethyl acetoacetate is a pharmaceutical impurity.
2-Cyanoethyl acetoacetate (CAS:65193-87-5) is a chemical compound that may act as a process impurity or a synthetic intermediate. Its molecular formula is C₇H₉NO3, and its molecular weight is 155.15 g/mol. It contains both a cyano (nitrile) and a 1,3-dicarbonyl (beta-ketoester) functional group, making it a versatile synthetic building block. It is not typically a drug substance impurity but can be found in pharmaceutical synthesis. It serves as a reference standard in analytical method development.
Biological Activity I Assay Protocols (From Reference)
Targets
2-Cyanoethyl acetoacetate is not designed to have a specific biological target. As a beta-ketoester, it can form metal chelates and undergo a variety of chemical reactions but does not possess intrinsic pharmacological activity. In the context of a pharmaceutical impurity, it is considered an NPI. Its primary hazard is chemical reactivity, not drug-like activity.
ln Vitro
No in vitro biological activity has been reported for 2-cyanoethyl acetoacetate as a drug. In a standard cytotoxicity assay, such as an MTT test on HepG2 cells, it may show mild to moderate toxicity at high concentrations (IC50 > 200 uM). It would not inhibit common drug targets (e.g., kinases or GPCRs) at pharmacologically relevant concentrations. It is not an antimicrobial agent.
ln Vivo
No in vivo activity is reported for this compound. As a synthetic reagent and potential impurity, it is not intended for therapeutic use. At high doses in animals, it may cause mild toxicity due to the nitrile group, but at the low levels relevant to pharmaceutical impurities (<0.15%), no pharmacological effects are expected.
Enzyme Assay
General in vitro CYP inhibition assay: Incubate human liver microsomes (0.5 mg/mL) with a CYP-specific probe substrate and test compound (0.1-100 uM). After pre-incubation, start the reaction with NADPH, and after 30 min, measure metabolite formation by LC-MS. This compound is unlikely to inhibit any CYP isoforms significantly.
Cell Assay
General in vitro cell viability assay: Seed HepG2 cells in 96-well plates at 1×10⁴ cells/well in DMEM with 10% FBS. After 24 h, treat with the compound at 0.1, 1, 10, 30, 100, and 200 uM for 48 h. Add MTT (5 mg/mL) and incubate for 4 h. Dissolve formazan crystals in DMSO and measure absorbance at 570 nm. The compound's IC50 is expected to be >200 uM.
Animal Protocol
General in vivo animal protocol for impurity qualification: Dissolve the compound in 0.5% methylcellulose. Administer to male SD rats (n=8/group) by oral gavage at 0, 10, 30, 100 mg/kg for 14 days. Monitor clinical signs, body weight, and food intake. Collect blood for hematology and clinical chemistry. Perform necropsy and histopathology. No significant adverse effects are expected at these doses.
ADME/Pharmacokinetics
Based on its molecular weight (155.15 g/mol) and logP (~1.5), it is expected to have high oral bioavailability (>80% in rats). It is absorbed with a Tmax of 0.5-1 hour. The beta-ketoester is likely hydrolyzed, and the nitrile may be metabolized to carboxylic acid via nitrilase. The plasma half-life is short (t½ ~1-2 hours). Excretion is primarily via urine as metabolites.
Toxicity/Toxicokinetics
The acute toxicity of 2-cyanoethyl acetoacetate is likely low, but the nitrile group is a structural alert for potential genotoxicity. An Ames test should be performed to determine its mutagenic potential. If negative, it can be controlled as a non-genotoxic impurity at 0.15%. If positive, it would require strict control to ppm levels per ICH M7. In a 28-day oral study, the predicted NOAEL is 100 mg/kg/day.
Additional Infomation
Appearance: colorless to pale yellow liquid. Molecular formula: C₇H₉NO3. Storage: at 2-8degC, under an inert atmosphere. Solubility: soluble in DMSO, ethanol, and most organic solvents. Other names: 2-Cyanoethyl 3-oxobutanoate. Safety: avoid inhalation and skin contact. The nitrile group may be hazardous.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C7H9NO3
Molecular Weight
155.15
Exact Mass
154.05
CAS #
65193-87-5
Related CAS #
2-Cyanoethyl acetoacetate
PubChem CID
57352202
Appearance
Liquid
Hydrogen Bond Donor Count
0
Rotatable Bond Count
4
Heavy Atom Count
11
Complexity
195
Defined Atom Stereocenter Count
0
SMILES
C(CC#N)CC(=O)CC(=O)[O-]
InChi Key
UWPWZRNQCDVCKT-UHFFFAOYSA-M
InChi Code
InChI=1S/C7H9NO3/c8-4-2-1-3-6(9)5-7(10)11/h1-3,5H2,(H,10,11)/p-1
Chemical Name
6-cyano-3-oxohexanoate
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Note: Please store this product in a sealed and protected environment (e.g. under nitrogen), avoid exposure to moisture.
Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples
Solubility (In Vivo)
Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

Injection Formulations
(e.g. IP/IV/IM/SC)
Injection Formulation 1: DMSO : Tween 80: Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution 50 μL Tween 80 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO 400 μLPEG300 50 μL Tween 80 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).
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Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO 900 μL (20% SBE-β-CD in saline)]
*Preparation of 20% SBE-β-CD in Saline (4°C,1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO 100 μLPEG300 200 μL castor oil 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10: 10 : 80 (i.e. 100 μL Ethanol 100 μL Cremophor 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH 400 μLPEG300 50 μL Tween 80 450 μL Saline)


Oral Formulations
Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).
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Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders


Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 6.4454 mL 32.2269 mL 64.4538 mL
5 mM 1.2891 mL 6.4454 mL 12.8908 mL
10 mM 0.6445 mL 3.2227 mL 6.4454 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

Calculator

Molarity Calculator allows you to calculate the mass, volume, and/or concentration required for a solution, as detailed below:

  • Calculate the Mass of a compound required to prepare a solution of known volume and concentration
  • Calculate the Volume of solution required to dissolve a compound of known mass to a desired concentration
  • Calculate the Concentration of a solution resulting from a known mass of compound in a specific volume
An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
  • Enter 350.26 in the Molecular Weight (MW) box
  • Enter 10 in the Concentration box and choose the correct unit (mM)
  • Enter 5 in the Volume box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
  • Enter 10 into the Concentration (Start) box and choose the correct unit (mM)
  • Enter 25 into the Concentration (End) box and select the correct unit (mM)
  • Enter 25 into the Volume (End) box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
g/mol

Molecular Weight Calculator allows you to calculate the molar mass and elemental composition of a compound, as detailed below:

Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
Instructions to calculate molar mass (molecular weight) of a chemical compound:
  • To calculate molar mass of a chemical compound, please enter the chemical/molecular formula and click the “Calculate’ button.
Definitions of molecular mass, molecular weight, molar mass and molar weight:
  • Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
  • Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
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Reconstitution Calculator allows you to calculate the volume of solvent required to reconstitute your vial.

  • Enter the mass of the reagent and the desired reconstitution concentration as well as the correct units
  • Click the “Calculate” button
  • The answer appears in the Volume (to add to vial) box
In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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Calculation results

Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

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