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Screening compounds

Naphtholas-ephosphate

Also known as Naphthol AS-E phosphate, N-(4-Chlorophenyl)-3-(phosphonooxy)naphthalene-2-carboxamide, 3-hydroxy-2-(hydroxymethyl)-2-methyl-1-phenyl-1-propanone

CAS 18228-17-6Formula C17H13ClNO5PMolar mass 377.72 g/molEC 242-106-1
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Naphtholas-ephosphate chemical structure, C17H13ClNO5P, CAS 18228-17-6
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
18228-17-6
Formula
C17H13ClNO5P
Molar mass
377.72 g/mol
EC number
242-106-1
HS code
292429
Category
Screening compounds

What is Naphtholas-ephosphate?

Plain description, key identifiers and synonyms

Naphtholas-ephosphate is a chemical substance with the molecular formula C17H13ClNO5P and a molar mass of 377.72 g/mol. Its CAS registry number is 18228-17-6. The IUPAC name is [3-[(4-chlorophenyl)carbamoyl]naphthalen-2-yl] dihydrogen phosphate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
[3-[(4-chlorophenyl)carbamoyl]naphthalen-2-yl] dihydrogen phosphate
CAS number
18228-17-6 CAS number cross-checked
EC number
242-106-1
Molecular formula
C17H13ClNO5P
UNII
H6R6B93QFC
MDL number
MFCD00042718
InChIKey
RQAQWBFHPMSXKR-UHFFFAOYSA-N
InChI
InChI=1S/C17H13ClNO5P/c18-13-5-7-14(8-6-13)19-17(20)15-9-11-3-1-2-4-12(11)10-16(15)24-25(21,22)23/h1-10H,(H,19,20)(H2,21,22,23)
SMILES (canonical and isomeric)
C1=CC=C2C=C(C(=CC2=C1)C(=O)NC3=CC=C(C=C3)Cl)OP(=O)(O)O

Synonyms

  • Naphthol AS-E phosphate
  • N-(4-Chlorophenyl)-3-(phosphonooxy)naphthalene-2-carboxamide
  • 3-hydroxy-2-(hydroxymethyl)-2-methyl-1-phenyl-1-propanone
  • ({3-[(4-chlorophenyl)carbamoyl]naphthalen-2-yl}oxy)phosphonic acid
  • KG501 cpd
  • KG 501
  • ((3-((4-chlorophenyl)carbamoyl)naphthalen-2-yl)oxy)phosphonic acid
  • 3-((4-Chlorophenyl)carbamoyl)naphthalen-2-yl dihydrogen phosphate
  • [3-[(4-chlorophenyl)carbamoyl]naphthalen-2-yl] dihydrogen phosphate
  • {3-[(4-chlorophenyl)carbamoyl]naphthalen-2-yl}oxyphosphonic acid
  • 3-[(4-chlorophenyl)carbamoyl]naphthalen-2-yl dihydrogen phosphate
  • KG-501 (2-naphthol-AS-E-phosphate)
  • C17H13ClNO5P
  • 2-Naphthol-AS-E-phosphate
  • Naphthol AS-E phosphate, 60%
  • N-(4-chlorophenyl)-3-(phosphonooxy)-2-naphthalenecarboxamide
  • KG-501(Naphthol AS-E phosphate)?
  • Naphthol AS-E phosphate, for histology
  • 2-Naphthanilide, 4'-chloro-3-hydroxy-, phosphate (6CI,7CI)
  • [3-[(4-chlorophenyl)carbamoyl]-2-naphthyl] dihydrogen phosphate
  • 3-[N-(4-chlorophenyl)carbamoyl](2-naphthyl) dihydrogen phosphate

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
377.72 g/molcalc.
Exact mass
377.022 Dacalc.
LogP (octanol/water)
4.22calc.
Topological polar surface area
95.86 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
4calc.
Heavy atoms
25calc.
Rings
3calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=C(Nc1ccccc1)c1ccc2ccccc2c1

O=C(Nc1ccccc1)c1ccc2ccccc2c1

3 rings, 19 atoms, the N-Phenylnaphthalene-2-carboxamide ring system.

375 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

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

Naphtholas-ephosphate suppliers

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Naphtholas-ephosphate 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 Naphtholas-ephosphate is traded under.

HS 2924.29Indicative HS code

Cyclic amides (including cyclic carbamates) and their derivatives, salts thereof, other

World exports in 2024
$5.69B
−5.1% vs 2023, imports $5.8B
2019 to 2024
Top exporters
  1. China32.3%
  2. Switzerland * partner reported13.6%
  3. Norway * partner reported12.8%
Top importers
  1. United States15.9%
  2. Ireland15.8%
  3. Germany11.9%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Naphtholas-ephosphate, based on the data on this page

What is Naphtholas-ephosphate?

Naphtholas-ephosphate is a chemical substance with the molecular formula C17H13ClNO5P and a molar mass of 377.72 g/mol. Its CAS registry number is 18228-17-6. The IUPAC name is [3-[(4-chlorophenyl)carbamoyl]naphthalen-2-yl] dihydrogen phosphate.

What is the CAS number of Naphtholas-ephosphate?

The CAS registry number of Naphtholas-ephosphate is 18228-17-6.

What is the molecular formula and weight of Naphtholas-ephosphate?

The molecular formula of Naphtholas-ephosphate is C17H13ClNO5P and its molar mass is 377.72 g/mol.

What is Naphtholas-ephosphate used for?

Known uses and roles of Naphtholas-ephosphate include building blocks in research and laboratory and screening compounds in research and laboratory.

Is Naphtholas-ephosphate hazardous?

No GHS hazard classification for Naphtholas-ephosphate is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Naphtholas-ephosphate?

Naphtholas-ephosphate is usually classified under HS code 292429 (Cyclic amides (including cyclic carbamates) and their derivatives, salts thereof, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Naphtholas-ephosphate?

CompoundList lists 1 supplier of Naphtholas-ephosphate in Switzerland. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Naphtholas-ephosphate?

Suppliers quote Naphtholas-ephosphate 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

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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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