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Procion yellow

Also known as Reactive Yellow 4, Procion Yellow M-R, Reactive Golden Yellow KKh

CAS 12226-45-8Formula C20H12Cl2N6Na2O6S2Molar mass 613.37 g/molEC 235-435-7
Procion yellow chemical structure, C20H12Cl2N6Na2O6S2, CAS 12226-45-8
2D chemical structure

Key facts

What buyers check first

CAS number
12226-45-8
Formula
C20H12Cl2N6Na2O6S2
Molar mass
613.37 g/mol
EC number
235-435-7
HS code
320416
Category
Reactive dyes

What is Procion yellow?

Plain description, key identifiers and synonyms

Procion yellow is a chemical substance with the molecular formula C20H12Cl2N6Na2O6S2 and a molar mass of 613.37 g/mol. Its CAS registry number is 12226-45-8. The IUPAC name is disodium, 3-[[4-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-2-methylphenyl]diazenyl]naphthalene-1,5-disulfonate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
disodium, 3-[[4-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-2-methylphenyl]diazenyl]naphthalene-1,5-disulfonate
CAS number
12226-45-8 CAS number cross-checked
EC number
235-435-7
Molecular formula
C20H12Cl2N6Na2O6S2
InChIKey
BMAUDWDYKLUBPY-UHFFFAOYSA-L
InChI
InChI=1S/C20H14Cl2N6O6S2.2Na/c1-10-7-11(23-20-25-18(21)24-19(22)26-20)5-6-15(10)28-27-12-8-14-13(17(9-12)36(32,33)34)3-2-4-16(14)35(29,30)31;;/h2-9H,1H3,(H,29,30,31)(H,32,33,34)(H,23,24,25,26);;/q;2*+1/p-2
SMILES (canonical and isomeric)
CC1=C(C=CC(=C1)NC2=NC(=NC(=N2)Cl)Cl)N=NC3=CC4=C(C=CC=C4S(=O)(=O)[O-])C(=C3)S(=O)(=O)[O-].[Na+].[Na+]

Synonyms

  • Reactive Yellow 4
  • Procion Yellow M-R
  • Reactive Golden Yellow KKh
  • Mikacion Yellow RS
  • Active Golden Yellow KKh
  • C.I. Reactive Yellow 4
  • 1,5-Naphthalenedisulfonic acid, 3-[[4-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-2-methylphenyl]azo]-, disodium salt
  • disodium, 3-[[4-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-2-methylphenyl]diazenyl]naphthalene-1,5-disulfonate
  • 1,5-Naphthalenedisulfonic acid, 3-((4-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-2-methylphenyl)azo)-, disodium salt
  • disodium 3-[(e)-{4-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-2-methylphenyl}diazenyl]naphthalene-1,5-disulfonate
  • 1,5-Naphthalenedisulfonic acid, 3-((4-((4,6-dichloro-s-triazin-2-yl)amino)-o-tolyl)azo)-, disodium salt
  • 1,5-Naphthalenedisulfonic acid, 3-(2-(4-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-2-methylphenyl)diazenyl)-, sodium salt (1:2)
  • Disodium 3-((4-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-o-tolyl)azo)naphthalene-1,5-disulphonate

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
613.37 g/molcalc.
Exact mass
611.9432 Dacalc.
LogP (octanol/water)
-1.38calc.
Topological polar surface area
189.8 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
12calc.
Rotatable bonds
6calc.
Heavy atoms
38calc.
Rings
4calc.
Aromatic rings
4calc.
Fraction sp3 carbons
0.05calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.
Lipinski rule of five
Fails (2 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, c1ccc2cc(N=Nc3ccc(Nc4ncncn4)cc3)ccc2c1

c1ccc2cc(N=Nc3ccc(Nc4ncncn4)cc3)ccc2c1

4 rings, 25 atoms.

27 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.

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Procion yellow 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

United States

  • TSCA inventory (USA)
    Status: Inactive 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 Procion yellow 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 Procion yellow is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

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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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