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Impurities and reference standards

Dopachrome

Also known as 5,6-dioxo-2,3-dihydro-1H-indole-2-carboxylic acid, 2,3,5,6-Tetrahydro-5,6-dioxo-1H-indole-2-carboxylic acid, 5,6-dioxo-2,3,5,6-tetrahydro-1H-indole-2-carboxylic acid

CAS 3571-34-4Formula C9H7NO4Molar mass 193.16 g/mol
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Dopachrome chemical structure, C9H7NO4, CAS 3571-34-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
3571-34-4
Formula
C9H7NO4
Molar mass
193.16 g/mol
HS code
293399
Category
Impurities and reference standards

What is Dopachrome?

Plain description, key identifiers and synonyms

Dopachrome is a member of orthoquinones. It is a tautomer of a 5,6-dihydroxyindole-2-carboxylic acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
5,6-dioxo-2,3-dihydro-1H-indole-2-carboxylic acid
CAS number
3571-34-4 CAS number cross-checkedOther or deprecated CAS: 13520-94-0
Molecular formula
C9H7NO4
UNII
DWA58A6ZW7
InChIKey
VJNCICVKUHKIIV-UHFFFAOYSA-N
InChI
InChI=1S/C9H7NO4/c11-7-2-4-1-6(9(13)14)10-5(4)3-8(7)12/h2-3,6,10H,1H2,(H,13,14)
SMILES (canonical and isomeric)
C1C(NC2=CC(=O)C(=O)C=C21)C(=O)O

Synonyms

  • 5,6-dioxo-2,3-dihydro-1H-indole-2-carboxylic acid
  • 2,3,5,6-Tetrahydro-5,6-dioxo-1H-indole-2-carboxylic acid
  • 5,6-dioxo-2,3,5,6-tetrahydro-1H-indole-2-carboxylic acid
  • 2-carboxy-2,3-dihydroindole-5,6-quinone
  • Dopachrom
  • Phenylephrine Impurity N2
  • 6-hydroxy-5-oxo-3,5-dihydro-2H-indole-2-carboxylic acid
  • 2-Indolinecarboxylic acid, 5,6-dihydro-5,6-dioxo-
  • 3,5-Dihydro-6-hydroxy-5-oxo-2H-indole-2-carboxylic acid
  • 1H-Indole-2-carboxylic acid, 2,3,5,6-tetrahydro-5,6-dioxo-
  • Dopachrome 3571-34-4 5,6-dioxo-2,3,5,6-tetrahydro-1H-indole-2-carboxylic acid 2,3,5,6-Tetrahydro-5,6-dioxo-1H-indole-2-carboxylic acid Dopachrom

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
193.16 g/molcalc.
Exact mass
193.0375 Dacalc.
LogP (octanol/water)
-0.61calc.
Topological polar surface area
83.47 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
1calc.
Heavy atoms
14calc.
Rings
2calc.
Aromatic rings
0calc.
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=C1C=C2CCNC2=CC1=O

O=C1C=C2CCNC2=CC1=O

2 rings, 11 atoms, the Dopaminechrome ring system.

19 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.

Dopachrome suppliers

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Dopachrome 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

Roles

  • animal metabolite
  • eukaryotic metabolite
  • mammalian metabolite
  • metabolite
  • mouse metabolite

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 Dopachrome is traded under.

HS 2933.99Indicative HS code

Heterocyclic compounds with nitrogen hetero-atom(s) only, other

World exports in 2024
$12.1B
−31.0% vs 2023, imports $28.8B
2019 to 2024
Top exporters
  1. China30.5%
  2. India * partner reported16.3%
  3. Ireland9.0%
Top importers
  1. Slovenia31.7%
  2. Italy24.2%
  3. United States5.0%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Dopachrome, based on the data on this page

What is Dopachrome?

Dopachrome is a member of orthoquinones. It is a tautomer of a 5,6-dihydroxyindole-2-carboxylic acid.

What is the CAS number of Dopachrome?

The CAS registry number of Dopachrome is 3571-34-4. Other or deprecated CAS numbers: 13520-94-0.

What is the molecular formula and weight of Dopachrome?

The molecular formula of Dopachrome is C9H7NO4 and its molar mass is 193.16 g/mol.

What is Dopachrome used for?

Known uses and roles of Dopachrome include animal metabolite, eukaryotic metabolite, mammalian metabolite, metabolite and mouse metabolite.

Is Dopachrome hazardous?

No GHS hazard classification for Dopachrome 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 Dopachrome?

Dopachrome is usually classified under HS code 293399 (Heterocyclic compounds with nitrogen hetero-atom(s) only, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Dopachrome?

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

What is the price of Dopachrome?

Suppliers quote Dopachrome 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 Dopachrome

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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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