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1-Naphthyl acetate

Cat No.:V29173 Purity: ≥98%
1-Naphthyl acetate is an attractive chromogenic substrate for detection of erythrocyte acetylcholinesterase (AChE) activity.
1-Naphthyl acetate
1-Naphthyl acetate Chemical Structure CAS No.: 830-81-9
Product category: New1
This product is for research use only, not for human use. We do not sell to patients.
Size Price Stock Qty
500mg
Other Sizes
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Product Description
1-Naphthyl acetate is an attractive chromogenic substrate for detection of erythrocyte acetylcholinesterase (AChE) activity. 1-Naphthyl acetate may be used to detect organophosphorus pesticide (OP) poisoning.
1-Naphthyl acetate (CAS 830-81-9), also known as alpha-naphthyl acetate, is a chromogenic substrate widely used in biochemical and histological applications. It is an acetate ester of 1-naphthol. 1-Naphthyl acetate may be used in a rapid staining method for identification of macrophages. Counts by this method were confirmed by the more complex morphological criteria, by phagocytosis, and by the presence of Fc receptors. It is an attractive chromogenic substrate for various enzymatic assays. The compound is used as a substrate for esterases and other hydrolytic enzymes, where enzymatic cleavage releases 1-naphthol, which can be detected colorimetrically or fluorometrically.
Biological Activity I Assay Protocols (From Reference)
Targets
1-Naphthyl acetate does not have a traditional therapeutic target. It is a substrate for esterases and other hydrolytic enzymes. Its mechanism of action is based on enzymatic hydrolysis: esterases cleave the acetate ester bond, releasing 1-naphthol. The released 1-naphthol can then react with diazonium salts to form a colored precipitate, enabling the detection and localization of enzyme activity in histological samples. It is used as a chromogenic substrate in various biochemical assays to measure esterase activity.
ln Vitro
In vitro, 1-Naphthyl acetate is used as a chromogenic substrate for detecting esterase activity in biological samples. It is employed in rapid staining methods for the identification of macrophages. The enzymatic hydrolysis of 1-naphthyl acetate by esterases releases 1-naphthol, which can be detected colorimetrically. It is not typically used as a therapeutic agent with pharmacological activity, but rather as a biochemical reagent for research and diagnostic applications.
ln Vivo
1-Naphthyl acetate is not used as a therapeutic agent in vivo. It is a biochemical reagent used in research and diagnostic applications. No in vivo pharmacological activity data is relevant. Its primary applications are in histology and biochemistry for the detection of enzyme activity.
Enzyme Assay
For in vitro cell-free assays, 1-Naphthyl acetate is used as a substrate for measuring esterase activity. The assay involves incubating the compound with the enzyme sample (e.g., esterase, lipase) in a suitable buffer. The enzymatic hydrolysis of 1-naphthyl acetate releases 1-naphthol, which can be detected by adding a diazonium salt (such as Fast Blue RR or Fast Red TR) to form a colored precipitate. The intensity of the color, measured spectrophotometrically, is proportional to the enzyme activity.
Cell Assay
For in vitro cellular assays, 1-Naphthyl acetate is used in histochemical staining procedures for the identification of macrophages and other cell types. Cells or tissue sections are incubated with a solution containing 1-naphthyl acetate and a diazonium salt. Esterase enzymes present in the cells hydrolyze the substrate, releasing 1-naphthol, which couples with the diazonium salt to form an insoluble colored precipitate at the site of enzyme activity. Stained cells are then visualized by light microscopy.
Animal Protocol
1-Naphthyl acetate is not used in animal models as a therapeutic agent. It is a biochemical reagent used in research and diagnostic applications. In vivo administration is not typically performed for this compound. Its use is limited to in vitro applications such as histochemical staining and enzyme assays.
ADME/Pharmacokinetics
1-Naphthyl acetate (CAS 830-81-9) has a molecular formula of C12H10O2 and a molecular weight of 186.21 g/mol. It is also known as 1-acetoxynaphthalene, alpha-naphthyl acetate, and acetic acid-1-naphthyl ester. Appearance: white solid. Melting point: 41-43°C. Boiling point: 310°C. Vapor pressure: 0.0006 (25°C). Solubility: insoluble in water. Storage: room temperature, in a cool and dark place (<15°C). Purity: typically ≥98%.
Toxicity/Toxicokinetics
No toxicity data is publicly available. As a laboratory reagent, 1-Naphthyl acetate should be handled with standard laboratory safety precautions. It is not intended for human consumption or therapeutic use.
References

[1]. 1-Naphthyl acetate: A chromogenic substrate for the detection of erythrocyte acetylcholinesterase activity. Biochimie. 2018 Nov;154:194-209.

Additional Infomation
1-Naphthyl acetate is a research-grade biochemical reagent and is not approved for therapeutic use. It is primarily used as a chromogenic substrate for detecting esterase activity in histological and biochemical applications. It is used in rapid staining methods for the identification of macrophages. Its mechanism involves enzymatic hydrolysis by esterases, releasing 1-naphthol which can be detected colorimetrically. No clinical trials have been reported.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C12H10O2
Molecular Weight
186.2066
Exact Mass
186.068
CAS #
830-81-9
PubChem CID
13247
Appearance
Off-white to light yellow solid powder
Density
1.2±0.1 g/cm3
Boiling Point
310.0±11.0 °C at 760 mmHg
Melting Point
43-46 °C(lit.)
Flash Point
110.4±8.2 °C
Vapour Pressure
0.0±0.7 mmHg at 25°C
Index of Refraction
1.604
LogP
2.79
Hydrogen Bond Donor Count
0
Hydrogen Bond Acceptor Count
2
Rotatable Bond Count
2
Heavy Atom Count
14
Complexity
212
Defined Atom Stereocenter Count
0
InChi Key
VGKONPUVOVVNSU-UHFFFAOYSA-N
InChi Code
InChI=1S/C12H10O2/c1-9(13)14-12-8-4-6-10-5-2-3-7-11(10)12/h2-8H,1H3
Chemical Name
naphthalen-1-yl acetate
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

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)
DMSO : ~100 mg/mL (~537.03 mM)
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 2.5 mg/mL (13.43 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

Solubility in Formulation 2: ≥ 2.5 mg/mL (13.43 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly.
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.

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Solubility in Formulation 3: ≥ 2.5 mg/mL (13.43 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.


 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 5.3703 mL 26.8514 mL 53.7028 mL
5 mM 1.0741 mL 5.3703 mL 10.7406 mL
10 mM 0.5370 mL 2.6851 mL 5.3703 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.

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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?
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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:
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Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
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Definitions of molecular mass, molecular weight, molar mass and molar weight:
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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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