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Aromatic building blocks

Metol

Also known as Graphol, Metatyl, Photol

CAS 55-55-0Formula C14H20N2O6SMolar mass 344.39 g/molEC 200-237-1
GHS signal word: Warning. Pictograms: Harmful or irritant, Serious health hazard, Hazardous to the environment 9 suppliers listed
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Metol chemical structure, C14H20N2O6S, CAS 55-55-0
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Crystals
Melting point
250 to 260
Solubility
Solubility in water, g/100ml at 15 °C: 4.7
HS code
292229
Category
Aromatic building blocks
UN number
UN 3077
Illustrative photo, drums, an IBC tote and sacks in a chemical warehouse in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Metol?

Plain description, key identifiers and synonyms

4-methylaminophenol sulfate is the sulfate salt of 4-methylaminophenol. It is functionally related to a 4-methylaminophenol.

Metol is a reducing aromatic compound used as developing agent in black and white photography.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
bis(4-(methylamino)phenol), sulfuric acid
CAS number
55-55-0 CAS number cross-checked
EC number
200-237-1
Molecular formula
C14H20N2O6S
UNII
D3W0VWG12M
MDL number
MFCD00013140
InChIKey
ZVNPWFOVUDMGRP-UHFFFAOYSA-N
InChI
InChI=1S/2C7H9NO.H2O4S/c2*1-8-6-2-4-7(9)5-3-6;1-5(2,3)4/h2*2-5,8-9H,1H3;(H2,1,2,3,4)
SMILES (canonical and isomeric)
CNC1=CC=C(C=C1)O.CNC1=CC=C(C=C1)O.OS(=O)(=O)O

Synonyms

  • Graphol
  • Metatyl
  • Photol
  • Pictol
  • Armol
  • Genol
  • Verol
  • Elon (developer)
  • p-Methylaminophenolsulfate
  • Paramethylaminophenol sulfate
  • Methyl-p-aminophenol sulfate
  • p-Methylaminophenol sulphate (2:1)
  • Elon
  • N-Methyl-4-hydroxyaniline hemisulfate
  • Jarocol pmap
  • Bis(4-hydroxy-N-methylanilinium) sulphate
  • Colorex pm
  • Phenol, 4-(methylamino)-, sulfate salt (2:1)
  • 4-(Methylamino)phenol sulfate (2:1) salt
  • 4-(Methylamino)phenol sulfate
  • p-Methylaminophenol Sulfate
  • N-Methyl-p-aminophenol sulfate
  • 4-(Methylamino)phenol hemisulfate
  • Planetol
  • bis(4-(methylamino)phenol), sulfuric acid
Show all 36 synonyms
  • Phenol, 4-(methylamino)-, sulfate (2:1)
  • Rhodol (VAN)
  • Elon (VAN)
  • p-Methylaminophenol sulfate (VAN)
  • monomethyl-p-aminophenol hemisulfate
  • bis(p-methylaminophenol), sulfuric acid
  • Phenol, p-methylamino-, sulfate (salt)
  • Phenol, p-(methylamino)-, sulfate (2:1) (salt)
  • bis[4-(methylamino)phenol] sulfate
  • ECOL(TM), >=98% (HPLC)
  • 4-(methylamino)phenol sulfate (2:1) (salt)

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

Physical form
Crystalsexp.
Melting point
250 to 260exp.
Autoignition temperature
531 °Cexp.
Solubility
Solubility in water, g/100ml at 15 °C: 4.7exp.

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
344.39 g/molcalc.
Exact mass
344.1042 Dacalc.
LogP (octanol/water)
2.21calc.
Topological polar surface area
139.1 Ųcalc.
Hydrogen bond donors
6calc.
Hydrogen bond acceptors
6calc.
Rotatable bonds
2calc.
Heavy atoms
23calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.14calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.
Lipinski rule of five
Passes (1 violation)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
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H302Harmful if swallowed.
  • H317May cause an allergic skin reaction.
  • H373May cause damage to organs through prolonged or repeated exposure.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (16)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3077
Transport hazard class
9
Packing group
III

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

Metol suppliers

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

All 9 suppliers
9 of 9 offers

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

9 suppliers in 4 countries

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Metol 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

Use classes: Cosmetics.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 650-031-00-4

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Metol is traded under.

HS 2922.29Indicative HS code

Amino-naphthols and other amino-phenols, other than those containing more than one kind…

World exports in 2024
$467M
−15.3% vs 2023, imports $454M
2019 to 2024
Top exporters
  1. China63.1%
  2. India * partner reported15.5%
  3. Japan4.0%
Top importers
  1. India * partner reported25.8%
  2. United States14.4%
  3. South Korea7.6%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Metol?

4-methylaminophenol sulfate is the sulfate salt of 4-methylaminophenol. It is functionally related to a 4-methylaminophenol.

What is the CAS number of Metol?

The CAS registry number of Metol is 55-55-0.

What is the molecular formula and weight of Metol?

The molecular formula of Metol is C14H20N2O6S and its molar mass is 344.39 g/mol.

What is Metol used for?

Use classes: Cosmetics.

Is Metol hazardous?

Metol carries the GHS signal word "Warning". Main hazards: harmful if swallowed, may cause an allergic skin reaction, may cause damage to organs through prolonged or repeated exposure. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Metol?

Metol is usually classified under HS code 292229 (Amino-naphthols and other amino-phenols, other than those containing more than one kind…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Metol?

CompoundList lists 9 suppliers of Metol in India, China, Canada and Italy. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Metol in India?

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

What is the price of Metol?

Suppliers quote Metol 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 Metol

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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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