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Amino acids and derivatives

A-101 Solution

Also known as A-101 Topical Solution, N-Phenylacetoaminomethylene-DL-p-nitrophenylalanine, (2S)-3-(4-nitrophenyl)-2-[[(2-phenylacetyl)amino]methylamino]propanoic acid

CAS 70172-42-8Formula C18H19N3O5Molar mass 357.37 g/mol
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A-101 Solution chemical structure, C18H19N3O5, CAS 70172-42-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
70172-42-8
Formula
C18H19N3O5
Molar mass
357.37 g/mol
HS code
292429
Category
Amino acids and derivatives

What is A-101 Solution?

Plain description, key identifiers and synonyms

A-101 Topical Solution is a proprietary topical formulation consisting of a high-concentration of hydrogen peroxide (H2O2), with potential keratolytic activity. Upon administration of the A-101 topical solution to an affected area of skin, the hydrogen peroxide penetrates into the cells, increases oxygen content, produces reactive oxygen species (ROS), causes oxidative stress and induces apoptosis through oxidative damage. This may clear the affected skin cells and remove common warts (verruca vulgaris) or seborrheic keratosis (SK).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(2S)-3-(4-nitrophenyl)-2-[[(2-phenylacetyl)amino]methylamino]propanoic acid
CAS number
70172-42-8 CAS number cross-checked
Molecular formula
C18H19N3O5
InChIKey
MALANEHOOMRDSZ-INIZCTEOSA-N
InChI
InChI=1S/C18H19N3O5/c22-17(11-13-4-2-1-3-5-13)20-12-19-16(18(23)24)10-14-6-8-15(9-7-14)21(25)26/h1-9,16,19H,10-12H2,(H,20,22)(H,23,24)/t16-/m0/s1
Canonical SMILES
O=C(Cc1ccccc1)NCNC(Cc1ccc([N+](=O)[O-])cc1)C(=O)O
Isomeric SMILES
C1=CC=C(C=C1)CC(=O)NCN[C@@H](CC2=CC=C(C=C2)[N+](=O)[O-])C(=O)O

Synonyms

  • A-101 Topical Solution
  • N-Phenylacetoaminomethylene-DL-p-nitrophenylalanine
  • (2S)-3-(4-nitrophenyl)-2-[[(2-phenylacetyl)amino]methylamino]propanoic acid
  • DL-Phenylalanine, 4-nitro-N-(((phenylacetyl)amino)methyl)-
  • N-{[(1-Hydroxy-2-phenylethylidene)amino]methyl}-4-nitro-L-phenylalanine
  • N-{[(1-Hydroxy-2-phenylethylidene)amino]methyl}-4-nitrophenylalanine

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
357.37 g/molcalc.
Exact mass
357.1325 Dacalc.
LogP (octanol/water)
1.5calc.
Topological polar surface area
121.6 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
5calc.
Rotatable bonds
9calc.
Heavy atoms
26calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.22calc.
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, O=C(Cc1ccccc1)NCNCCc1ccccc1

O=C(Cc1ccccc1)NCNCCc1ccccc1

2 rings, 20 atoms.

No other chemical in our database has 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.

A-101 Solution suppliers

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A-101 Solution 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 A-101 Solution 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 A-101 Solution is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about A-101 Solution, based on the data on this page

What is A-101 Solution?

A-101 Topical Solution is a proprietary topical formulation consisting of a high-concentration of hydrogen peroxide (H2O2), with potential keratolytic activity.

What is the CAS number of A-101 Solution?

The CAS registry number of A-101 Solution is 70172-42-8.

What is the molecular formula and weight of A-101 Solution?

The molecular formula of A-101 Solution is C18H19N3O5 and its molar mass is 357.37 g/mol.

Is A-101 Solution hazardous?

No GHS hazard classification for A-101 Solution 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 A-101 Solution?

A-101 Solution 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 A-101 Solution?

Post a free request on CompoundList and suppliers of A-101 Solution will send you quotes. Your contact details stay private until you accept a quote.

What is the price of A-101 Solution?

Suppliers quote A-101 Solution 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 A-101 Solution

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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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