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Reactive dyes

Reactive Blue 2

Also known as Procion Blue HB, Cibacron Blue F 3GA, C.I. 61211

CAS 12236-82-7Formula C29H20ClN7O11S3Molar mass 774.17 g/molEC 235-465-0
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Reactive Blue 2 chemical structure, C29H20ClN7O11S3, CAS 12236-82-7
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
12236-82-7
Formula
C29H20ClN7O11S3
Molar mass
774.17 g/mol
EC number
235-465-0
HS code
320416
Category
Reactive dyes

What is Reactive Blue 2?

Plain description, key identifiers and synonyms

Reactive blue 2 is an anthraquinone.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1-amino-4-[4-[[4-chloro-6-(3-sulfoanilino)-1,3,5-triazin-2-yl]amino]-3-sulfoanilino]-9,10-dioxoanthracene-2-sulfonic acid
CAS number
12236-82-7 CAS number cross-checkedOther or deprecated CAS: 79241-87-5
EC number
235-465-0
Molecular formula
C29H20ClN7O11S3
UNII
5DV0L8V99J, J0A052J6QF
InChIKey
JQYMGXZJTCOARG-UHFFFAOYSA-N
InChI
InChI=1S/C29H20ClN7O11S3/c30-27-35-28(33-13-4-3-5-15(10-13)49(40,41)42)37-29(36-27)34-18-9-8-14(11-20(18)50(43,44)45)32-19-12-21(51(46,47)48)24(31)23-22(19)25(38)16-6-1-2-7-17(16)26(23)39/h1-12,32H,31H2,(H,40,41,42)(H,43,44,45)(H,46,47,48)(H2,33,34,35,36,37)
SMILES (canonical and isomeric)
C1=CC=C2C(=C1)C(=O)C3=C(C2=O)C(=C(C=C3NC4=CC(=C(C=C4)NC5=NC(=NC(=N5)NC6=CC(=CC=C6)S(=O)(=O)O)Cl)S(=O)(=O)O)S(=O)(=O)O)N

Synonyms

  • Procion Blue HB
  • Cibacron Blue F 3GA
  • C.I. 61211
  • 2-Anthracenesulfonic acid, 1-amino-4-((4-((4-chloro-6-((3(or 4)-sulfophenyl)amino)-1,3,5-triazin-2-yl)amino)-3-sulfophenyl)amino)-9,10-dihydro-9,10-dioxo-
  • Affi-gel blue
  • 1-Amino-4-((4-((4-chloro-6-((3(or4)-sulphophenyl)amino)-1,3,5-triazin-2-yl)amino)-3-sulphophenyl)amino)-9,10-dihydro-9,10-dioxoanthracene-2-sulphonic acid
  • 1-Amino-4-((4-((4-chloro-6-((sulfophenyl)amino)-1,3,5-triazin-2-yl)amino)-3-sulfophenyl)amino)-9,10-dihydro-9,10-dioxo-2-anthracenesulfonic acid
  • 2-Anthracenesulfonic acid, 1-amino-4-(4-((4-chloro-6-(sulfoanilino)-s-triazin-2-yl)amino)-3-sulfoanilino)-9,10-dihydro-9,10-dioxo-
  • Cibacron Blue F3GA
  • Cibacron Blue F(3)GA
  • 1-amino-4-(4-((4-chloro-6-(3-sulfoanilino)-1,3,5-triazin-2-yl)amino)-3-sulfo-anilino)-9,10-dioxo-anthracene-2-sulfonic acid
  • 1-amino-4-[4-[[4-chloro-6-(3-sulfoanilino)-1,3,5-triazin-2-yl]amino]-3-sulfo-anilino]-9,10-dioxo-anthracene-2-sulfonic acid
  • C.I. Reactive Blue 2
  • cibacron Blue 3G-A
  • Affi gel blue
  • Cibacron Blue 3G
  • Cibacronblau F3G-A
  • 1-amino-4-[4-[[4-chloro-6-(3-sulfoanilino)-1,3,5-triazin-2-yl]amino]-3-sulfoanilino]-9,10-dioxoanthracene-2-sulfonic acid
  • 1-Amino-4-((4-((4-chloro-6-((3-sulfophenyl)amino)-1,3,5-triazin-2-yl)amino)-3-sulfophenyl)amino)-9,10-dihydro-9,10-dioxo-2-anthracenesulfonic acid
  • 2-Anthracenesulfonic acid, 1-amino-4-((4-((4-chloro-6-((3-sulfophenyl)amino)-1,3,5-triazin-2-yl)amino)-3-sulfophenyl)amino)-9,10-dihydro-9,10-dioxo-
  • 2-Anthraquinonesulfonic acid, 1-amino-4-(4-((4-chloro-6-m-sulfoanilino-S-triazin-2-yl)amino)-3-sulfoanilino)-
  • Procion Blue H-B
  • Reactive Blue-2
  • 1-amino-4-[[4-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-3-sulfophenyl]amino]-9,10-dioxoanthracene-2-sulfonic 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
774.17 g/molcalc.
Exact mass
773.0071 Dacalc.
LogP (octanol/water)
3.85calc.
Topological polar surface area
298 Ųcalc.
Hydrogen bond donors
7calc.
Hydrogen bond acceptors
15calc.
Rotatable bonds
9calc.
Heavy atoms
51calc.
Rings
6calc.
Aromatic rings
5calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Fails (3 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=C1c2ccccc2C(=O)c2c(Nc3ccc(Nc4ncnc(Nc5ccccc5)n4)cc3)cccc21

O=C1c2ccccc2C(=O)c2c(Nc3ccc(Nc4ncnc(Nc5ccccc5)n4)cc3)cccc21

6 rings, 37 atoms.

4 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.

Reactive Blue 2 suppliers

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All 3 suppliers

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Where suppliers are based

3 suppliers in 2 countries

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Reactive Blue 2 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

Pharmacological actions

  • Coloring Agents
  • Enzyme Inhibitors
  • Protein Synthesis Inhibitors

Regulatory status

Inventories, regulations and trade controls that list this substance

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 Reactive Blue 2 is traded under.

HS 3204.16Indicative HS code

Reactive dyes and preparations based thereon

World exports in 2024
$1.12B
+2.4% vs 2023, imports $1B
2019 to 2024
Top exporters
  1. India * partner reported31.7%
  2. China17.9%
  3. South Korea17.1%
Top importers
  1. Turkey18.4%
  2. China9.4%
  3. Vietnam * partner reported6.6%

* Partner reported figures, a lower bound.

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

The HS code shown for Reactive Blue 2 is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Reactive Blue 2, based on the data on this page

What is Reactive Blue 2?

Reactive blue 2 is an anthraquinone.

What is the CAS number of Reactive Blue 2?

The CAS registry number of Reactive Blue 2 is 12236-82-7. Other or deprecated CAS numbers: 79241-87-5.

What is the molecular formula and weight of Reactive Blue 2?

The molecular formula of Reactive Blue 2 is C29H20ClN7O11S3 and its molar mass is 774.17 g/mol.

What is Reactive Blue 2 used for?

Known uses and roles of Reactive Blue 2 include textile dyes in textiles and leather, biochemical and pharmacological tools in research and laboratory, coloring agents, enzyme inhibitors and protein synthesis inhibitors.

Is Reactive Blue 2 hazardous?

No GHS hazard classification for Reactive Blue 2 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 Reactive Blue 2?

Reactive Blue 2 is usually classified under HS code 320416 (Reactive dyes and preparations based thereon). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Reactive Blue 2?

CompoundList lists 3 suppliers of Reactive Blue 2 in United States and 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 Reactive Blue 2?

Suppliers quote Reactive Blue 2 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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