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Impurities and reference standards

Dopac

Also known as 3,4-Dihydroxyphenylacetic acid, 2-(3,4-Dihydroxyphenyl)acetic acid, Homoprotocatechuic acid

CAS 102-32-9Formula C8H8O4Molar mass 168.15 g/molEC 203-024-1
GHS signal word: Warning. Pictograms: Harmful or irritant 93 suppliers listed
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Dopac chemical structure, C8H8O4, CAS 102-32-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
102-32-9
Formula
C8H8O4
Molar mass
168.15 g/mol
EC number
203-024-1
HS code
291829
Category
Impurities and reference standards

What is Dopac?

Plain description, key identifiers and synonyms

(3,4-dihydroxyphenyl)acetic acid is a dihydroxyphenylacetic acid having the two hydroxy substituents located at the 3- and 4-positions. It is a metabolite of dopamine. It has a role as a human metabolite. It is a member of catechols and a dihydroxyphenylacetic acid. It is functionally related to a phenylacetic acid. It is a conjugate acid of a (3,4-dihydroxyphenyl)acetate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-(3,4-dihydroxyphenyl)acetic acid
CAS number
102-32-9 CAS number cross-checked
EC number
203-024-1
Molecular formula
C8H8O4
UNII
KEX5N0R4N5
MDL number
MFCD00004338
InChIKey
CFFZDZCDUFSOFZ-UHFFFAOYSA-N
InChI
InChI=1S/C8H8O4/c9-6-2-1-5(3-7(6)10)4-8(11)12/h1-3,9-10H,4H2,(H,11,12)
SMILES (canonical and isomeric)
C1=CC(=C(C=C1CC(=O)O)O)O

Synonyms

  • 3,4-Dihydroxyphenylacetic acid
  • 2-(3,4-Dihydroxyphenyl)acetic acid
  • Homoprotocatechuic acid
  • Dopacetic acid
  • Benzeneacetic acid, 3,4-dihydroxy-
  • Acetic acid, (3,4-dihydroxyphenyl)-
  • BA 2773
  • 3,4 Dihydroxyphenylacetic Acid
  • 3,4-Dihydroxybenzeneacetic acid
  • Dihydroxyphenylacetic acid
  • (3,4-Dihydroxyphenyl)acetic acid
  • 3,4-Dihydroxy-phenylacetic acid
  • Dopamine Impurity 8
  • 3,4-Dihydroxyphenylaceticacid
  • Catechol-4-acetic Acid
  • 3,4-DHPOP
  • 3,4-dihydroxyphenyl acetic acid
  • 4-Carboxymethylcatechol
  • Acetic acid, (3,4-dihydroxyphenyl)-,
  • DHY
  • 3,4-Dihydroxyphenylacetate, XV
  • 4-Carboxymethylpyrocatechol
  • Dopacetate
  • 3pcn
  • Dihydroxyphenylacetate
Show all 34 synonyms
  • 1ai4
  • Pyrocatechol-4-acetic Acid
  • 3,4-Dihydroxybenzeneacetate
  • 34-Dihydroxyphenylacetic Acid
  • Benzeneacetic acid,4-dihydroxy-
  • Acetic acid,4-dihydroxyphenyl)-
  • 3,4-dihydroxy-Benzeneacetic acid
  • 3,4-dihydroxyl phenylacetic acid
  • (3,4-dihydroxyphenyl)-Acetic acid

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
168.15 g/molcalc.
Exact mass
168.0423 Dacalc.
LogP (octanol/water)
0.72calc.
Topological polar surface area
77.76 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
2calc.
Heavy atoms
12calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.13calc.
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, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (16)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • 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

Dopac suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 93 suppliers
30 of 30 offers
  • Dhruvtara Chemicals Pvt. Ltd.
    IndiaUnclaimed profile
    DopacGrade, purity and minimum order on request
    Price on request
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  • Extrasynthese
    FranceUnclaimed profile
    DopacGrade, purity and minimum order on request
    Price on request
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  • Reddy N Reddy Pharmaceuticals
    India, Hyderabad ManufacturerUnclaimed profile
    DopacGrade, purity and minimum order on request
    Price on request
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  • WeylChem GmbH
    GermanyUnclaimed profile
    DopacGrade, purity and minimum order on request
    Price on request
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  • zybiopharma.com
    Unclaimed profile
    DopacGrade, purity and minimum order on request
    Price on request
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  • Ricci Chimica
    ItalyUnclaimed profile
    DopacGrade, purity and minimum order on request
    Price on request
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  • 001Chemical
    China, HangzhouUnclaimed profile
    DopacGrade, purity and minimum order on request
    Price on request
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  • 10X Chem
    United States, San DiegoUnclaimed profile
    DopacGrade, purity and minimum order on request
    Price on request
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  • 1st Scientific LLC
    China, NanjingUnclaimed profile
    DopacGrade, purity and minimum order on request
    Price on request
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  • 3WAY Pharm Inc
    China, ShanghaiUnclaimed profile
    DopacGrade, purity and minimum order on request
    Price on request
    View

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

93 suppliers in 17 countries

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Dopac price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

Roles

  • animal metabolite
  • eukaryotic metabolite
  • human metabolite
  • mammalian metabolite
  • 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 Dopac is traded under.

HS 2918.29Indicative HS code

Carboxylic acids, (with phenol function but without other oxygen function), their anhydrides, halides…

World exports in 2024
$861M
+0.9% vs 2023, imports $892M
2019 to 2024
Top exporters
  1. China30.5%
  2. South Korea18.3%
  3. Switzerland * partner reported13.3%
Top importers
  1. United States14.7%
  2. Germany13.3%
  3. Japan10.3%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Dopac?

(3,4-dihydroxyphenyl)acetic acid is a dihydroxyphenylacetic acid having the two hydroxy substituents located at the 3- and 4-positions. It is a metabolite of dopamine. It has a role as a human metabolite. It is a member of catechols and a dihydroxyphenylacetic acid. It is functionally related to a phenylacetic acid.

What is the CAS number of Dopac?

The CAS registry number of Dopac is 102-32-9.

What is the molecular formula and weight of Dopac?

The molecular formula of Dopac is C8H8O4 and its molar mass is 168.15 g/mol.

What is Dopac used for?

Known uses and roles of Dopac include animal metabolite, eukaryotic metabolite, human metabolite, mammalian metabolite and metabolite.

Is Dopac hazardous?

Dopac carries the GHS signal word "Warning". Main hazards: causes skin irritation, causes serious eye irritation, may cause respiratory irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Dopac?

Dopac is usually classified under HS code 291829 (Carboxylic acids with phenol function but without other oxygen function, their…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Dopac?

CompoundList lists 93 suppliers of Dopac in China, United States, Germany, United Kingdom and 13 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Dopac in India?

2 suppliers in India list Dopac on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Dopac?

Suppliers quote Dopac 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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