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Impurities and reference standards

Phthiocol

Also known as 2-Hydroxy-3-methyl-1,4-naphthoquinone, Phthiokol, 2-Hydroxy-3-methylnaphthalene-1,4-dione

CAS 483-55-6Formula C11H8O3Molar mass 188.18 g/molEC 207-594-2
1 supplier listed
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Phthiocol chemical structure, C11H8O3, CAS 483-55-6
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
483-55-6
Formula
C11H8O3
Molar mass
188.18 g/mol
EC number
207-594-2
HS code
291469
Category
Impurities and reference standards

What is Phthiocol?

Plain description, key identifiers and synonyms

Phthiocol is a naphthoquinone.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-hydroxy-3-methylnaphthalene-1,2-dione
CAS number
483-55-6 CAS number cross-checked
EC number
207-594-2
Molecular formula
C11H8O3
UNII
8R72C50E69
InChIKey
BGVCGTNXEKDVCB-UHFFFAOYSA-N
InChI
InChI=1S/C11H8O3/c1-6-9(12)7-4-2-3-5-8(7)11(14)10(6)13/h2-5,12H,1H3
SMILES (canonical and isomeric)
CC1=C(C2=CC=CC=C2C(=O)C1=O)O

Synonyms

  • 2-Hydroxy-3-methyl-1,4-naphthoquinone
  • Phthiokol
  • 2-Hydroxy-3-methylnaphthalene-1,4-dione
  • 3-Hydroxy-2-methyl-1,4-naphthoquinone
  • 2-Methyl-3-hydroxy-1,4-naphthoquinone
  • 2-hydroxy-3-methyl-1,4-dihydronaphthalene-1,4-dione
  • 4-hydroxy-3-methylnaphthalene-1,2-dione
  • 1,4-Naphthoquinone, 2-hydroxy-3-methyl-
  • 1,4-Naphthalenedione, 2-hydroxy-3-methyl-
  • 2-Hydroxy-3-methyl-1,4-naphthalenedione
  • Vitamin K1 Impurity 5
  • Vitamin K1 Impurity 88
  • 3-Methyl-2-hydroxy-1,4-naphthoquinone
  • 1, 2-hydroxy-3-methyl-
  • 4-08-00-02375 (Beilstein Handbook Reference)
  • 1,4-Naphthalenedione, 2-hydroxy-3-methyl- (9CI)
  • 2-Hydroxy-3-methylnaphthoquinone
  • 2-Hydroxy-3-methylnaphthoquinone #
  • 2-hydroxy-3-methyl-naphthalene-1,4-dione
  • 3-Hydroxy-2-methyl-1,4-naphthaquinone
  • 3-Methyl-2-hydroxy-1,4-naphthalenedione

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
188.18 g/molcalc.
Exact mass
188.0473 Dacalc.
LogP (octanol/water)
1.74calc.
Topological polar surface area
54.37 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
0calc.
Heavy atoms
14calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.09calc.
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=C1C=Cc2ccccc2C1=O

O=C1C=Cc2ccccc2C1=O

2 rings, 12 atoms, the 1,2-Naphthoquinone ring system.

313 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.

Phthiocol suppliers

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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

1 supplier in 1 country

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Phthiocol price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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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 Phthiocol is traded under.

HS 2914.69Indicative HS code

Quinones, other

World exports in 2024
$162M
−10.1% vs 2023, imports $157M
2019 to 2024
Top exporters
  1. China32.8%
  2. Netherlands29.3%
  3. Japan13.8%
Top importers
  1. United States23.0%
  2. India * partner reported16.1%
  3. Thailand7.9%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Phthiocol?

Phthiocol is a naphthoquinone.

What is the CAS number of Phthiocol?

The CAS registry number of Phthiocol is 483-55-6.

What is the molecular formula and weight of Phthiocol?

The molecular formula of Phthiocol is C11H8O3 and its molar mass is 188.18 g/mol.

Is Phthiocol hazardous?

No GHS hazard classification for Phthiocol 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 Phthiocol?

Phthiocol is usually classified under HS code 291469 (Quinones, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Phthiocol?

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

What is the price of Phthiocol?

Suppliers quote Phthiocol 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 Phthiocol

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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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