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Impurities and reference standards

Thionolin

Also known as Thionoline, Thionoline-, 7-Amino-3H-phenothiazin-3-one

CAS 3773-36-2Formula C12H8N2OSMolar mass 228.28 g/mol
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Thionolin chemical structure, C12H8N2OS, CAS 3773-36-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
3773-36-2
Formula
C12H8N2OS
Molar mass
228.28 g/mol
HS code
320413
Category
Impurities and reference standards

What is Thionolin?

Plain description, key identifiers and synonyms

Thionolin is a chemical substance with the molecular formula C12H8N2OS and a molar mass of 228.28 g/mol. Its CAS registry number is 3773-36-2. The IUPAC name is 7-aminophenothiazin-3-one.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
7-aminophenothiazin-3-one
CAS number
3773-36-2
Molecular formula
C12H8N2OS
UNII
6W8RE018ZN
InChIKey
OBSWMVCSYZHGIQ-UHFFFAOYSA-N
InChI
InChI=1S/C12H8N2OS/c13-7-1-3-9-11(5-7)16-12-6-8(15)2-4-10(12)14-9/h1-6H,13H2
SMILES (canonical and isomeric)
C1=CC2=C(C=C1N)SC3=CC(=O)C=CC3=N2

Synonyms

  • Thionoline
  • Thionoline-
  • 7-Amino-3H-phenothiazin-3-one
  • 3H-Phenothiazin-3-one, 7-amino-
  • Methylene Blue Impurity 32
  • Methylene blue /Methylthioninium Chloride Impurity 20

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
228.28 g/molcalc.
Exact mass
228.0357 Dacalc.
LogP (octanol/water)
2.34calc.
Topological polar surface area
55.98 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
0calc.
Heavy atoms
16calc.
Rings
3calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0calc.
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=c1ccc2nc3ccccc3sc-2c1

O=c1ccc2nc3ccccc3sc-2c1

3 rings, 15 atoms, the Phenothiazone ring system.

59 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.

Thionolin suppliers

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Thionolin 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

Industries and functions

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 Thionolin is traded under.

HS 3204.13Indicative HS code

Basic dyes and preparations based thereon

World exports in 2024
$209M
−2.6% vs 2023, imports $224M
2019 to 2024
Top exporters
  1. India * partner reported27.9%
  2. China21.8%
  3. Spain6.6%
Top importers
  1. United States11.2%
  2. China7.9%
  3. Germany7.4%

* Partner reported figures, a lower bound.

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

The HS code shown for Thionolin is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Thionolin?

Thionolin is a chemical substance with the molecular formula C12H8N2OS and a molar mass of 228.28 g/mol. Its CAS registry number is 3773-36-2. The IUPAC name is 7-aminophenothiazin-3-one.

What is the CAS number of Thionolin?

The CAS registry number of Thionolin is 3773-36-2.

What is the molecular formula and weight of Thionolin?

The molecular formula of Thionolin is C12H8N2OS and its molar mass is 228.28 g/mol.

What is Thionolin used for?

Known uses and roles of Thionolin include textile dyes in textiles and leather.

Is Thionolin hazardous?

No GHS hazard classification for Thionolin 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 Thionolin?

Thionolin is usually classified under HS code 320413 (Basic dyes and preparations based thereon). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Thionolin?

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What is the price of Thionolin?

Suppliers quote Thionolin 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 Thionolin

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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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