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Impurities and reference standards

Modafinil ester

Also known as Methyl (benzhydrylsulfinyl)acetate, Modafinil impurity C, Methyl ((RS)-(diphenylmethyl)sulfinyl)acetate

CAS 63547-25-1Formula C16H16O3SMolar mass 288.37 g/molEC 680-806-2
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Modafinil ester chemical structure, C16H16O3S, CAS 63547-25-1
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
63547-25-1
Formula
C16H16O3S
Molar mass
288.37 g/mol
EC number
680-806-2
HS code
293090
Category
Impurities and reference standards

What is Modafinil ester?

Plain description, key identifiers and synonyms

Modafinil ester is a chemical substance with the molecular formula C16H16O3S and a molar mass of 288.37 g/mol. Its CAS registry number is 63547-25-1. The IUPAC name is methyl 2-[(S)-benzhydrylsulfinyl]acetate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
methyl 2-[(S)-benzhydrylsulfinyl]acetate
CAS number
63547-25-1Other or deprecated CAS: 865811-65-0
EC number
680-806-2
Molecular formula
C16H16O3S
UNII
5BAP7W5TXD
InChIKey
JFMZFATUMFWKEA-FQEVSTJZSA-N
InChI
InChI=1S/C16H16O3S/c1-19-15(17)12-20(18)16(13-8-4-2-5-9-13)14-10-6-3-7-11-14/h2-11,16H,12H2,1H3/t20-/m0/s1
Canonical SMILES
COC(=O)CS(=O)C(c1ccccc1)c1ccccc1
Isomeric SMILES
COC(=O)C[S@](=O)C(C1=CC=CC=C1)C2=CC=CC=C2

Synonyms

  • Methyl (benzhydrylsulfinyl)acetate
  • Modafinil impurity C
  • Methyl ((RS)-(diphenylmethyl)sulfinyl)acetate
  • 2-((Diphenylmethyl)sulfinyl)acetic acid methyl ester
  • Acetic acid, ((diphenylmethyl)sulfinyl)-, methyl ester
  • Acetic acid, 2-((diphenylmethyl)sulfinyl)-, methyl ester
  • Modafinil impurity c (ep impurity)
  • 2-[(Diphenylmethyl)sulfinyl]acetic Acid Methyl Ester
  • Modafinil carboxylate methyl ester
  • (S)-Modafinil Carboxylate Methyl Ester
  • Methyl [(S)-diphenylmethanesulfinyl]acetate
  • methyl 2-[(S)-benzhydrylsulfinyl]acetate
  • Methyl 2-((diphenylmethyl)sulfinyl)acetate
  • methyl 2-(benzhydrylsulfinyl)acetate
  • 2-[(S)-(Diphenylmethyl)sulfinyl]-acetic Acid Methyl Ester, Methyl (S)-(Benzhydrylsulfinyl)acetate
  • Controlled Substance<br>(Modafinil EP Impurity C)

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
288.37 g/molcalc.
Exact mass
288.082 Dacalc.
LogP (octanol/water)
2.7calc.
Topological polar surface area
43.37 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
5calc.
Heavy atoms
20calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.19calc.
Formal charge
0calc.
Stereocentres
1calc.
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, c1ccc(Cc2ccccc2)cc1

c1ccc(Cc2ccccc2)cc1

2 rings, 13 atoms, the Diphenylmethane ring system.

8,982 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS classification
Hazard pictograms

Hazard statements

  • H412Harmful to aquatic life with long lasting effects.
  • H413May cause long lasting harmful effects to aquatic life.
Precautionary statements (2)
  • P273Avoid release to the environment.
  • 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

Modafinil ester suppliers

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Where suppliers are based

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Modafinil ester 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

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

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 Modafinil ester is traded under.

HS 2930.90Indicative HS code

Organo-sulphur compounds, other

World exports in 2024
$5.83B
+0.1% vs 2023, imports $5.93B
2019 to 2024
Top exporters
  1. China40.7%
  2. United States10.9%
  3. Japan9.3%
Top importers
  1. United States13.3%
  2. Brazil12.6%
  3. China6.6%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

Quick answers about Modafinil ester, based on the data on this page

What is Modafinil ester?

Modafinil ester is a chemical substance with the molecular formula C16H16O3S and a molar mass of 288.37 g/mol. Its CAS registry number is 63547-25-1. The IUPAC name is methyl 2-[(S)-benzhydrylsulfinyl]acetate.

What is the CAS number of Modafinil ester?

The CAS registry number of Modafinil ester is 63547-25-1. Other or deprecated CAS numbers: 865811-65-0.

What is the molecular formula and weight of Modafinil ester?

The molecular formula of Modafinil ester is C16H16O3S and its molar mass is 288.37 g/mol.

Is Modafinil ester hazardous?

Modafinil ester has a GHS hazard classification. Main hazards: harmful to aquatic life with long lasting effects, may cause long lasting harmful effects to aquatic life. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Modafinil ester?

Modafinil ester is usually classified under HS code 293090 (Organo-sulphur compounds, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Modafinil ester?

CompoundList lists 1 supplier of Modafinil ester in Italy. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Modafinil ester?

Suppliers quote Modafinil ester 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 Modafinil ester

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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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