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Optical brighteners

Cellu-brite

Also known as 4,4'-bis(4,6-dianilino-1,3,5-triazin-2-yl)amino-stilbene-2,2'disulfonate disodium salt, Blankophor HZPA, Fluorescent Brightener 9

CAS 133-66-4Formula C44H34N12Na2O6S2Molar mass 936.95 g/molEC 205-117-2
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Cellu-brite chemical structure, C44H34N12Na2O6S2, CAS 133-66-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
133-66-4
Formula
C44H34N12Na2O6S2
Molar mass
936.95 g/mol
EC number
205-117-2
HS code
320420
Category
Optical brighteners

What is Cellu-brite?

Plain description, key identifiers and synonyms

Cellu-brite is a chemical substance with the molecular formula C44H34N12Na2O6S2 and a molar mass of 936.95 g/mol. Its CAS registry number is 133-66-4. The IUPAC name is disodium, 5-[(4,6-dianilino-1,3,5-triazin-2-yl)amino]-2-[(E)-2-[4-[(4,6-dianilino-1,3,5-triazin-2-yl)amino]-2-sulfonatophenyl]ethenyl]benzenesulfonate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
disodium, 5-[(4,6-dianilino-1,3,5-triazin-2-yl)amino]-2-[(E)-2-[4-[(4,6-dianilino-1,3,5-triazin-2-yl)amino]-2-sulfonatophenyl]ethenyl]benzenesulfonate
CAS number
133-66-4
EC number
205-117-2
Molecular formula
C44H34N12Na2O6S2
UNII
CRN2143Y31
InChIKey
HOSFCSQXJQXSIQ-ZPZFBZIMSA-L
InChI
InChI=1S/C44H36N12O6S2.2Na/c57-63(58,59)37-27-35(49-43-53-39(45-31-13-5-1-6-14-31)51-40(54-43)46-32-15-7-2-8-16-32)25-23-29(37)21-22-30-24-26-36(28-38(30)64(60,61)62)50-44-55-41(47-33-17-9-3-10-18-33)52-42(56-44)48-34-19-11-4-12-20-34;;/h1-28H,(H,57,58,59)(H,60,61,62)(H3,45,46,49,51,53,54)(H3,47,48,50,52,55,56);;/q;2*+1/p-2/b22-21+;;
Canonical SMILES
O=S(=O)([O-])c1cc(Nc2nc(Nc3ccccc3)nc(Nc3ccccc3)n2)ccc1C=Cc1ccc(Nc2nc(Nc3ccccc3)nc(Nc3ccccc3)n2)cc1S(=O)(=O)[O-].[Na+].[Na+]
Isomeric SMILES
C1=CC=C(C=C1)NC2=NC(=NC(=N2)NC3=CC(=C(C=C3)/C=C/C4=C(C=C(C=C4)NC5=NC(=NC(=N5)NC6=CC=CC=C6)NC7=CC=CC=C7)S(=O)(=O)[O-])S(=O)(=O)[O-])NC8=CC=CC=C8.[Na+].[Na+]

Synonyms

  • 4,4'-bis(4,6-dianilino-1,3,5-triazin-2-yl)amino-stilbene-2,2'disulfonate disodium salt
  • Blankophor HZPA
  • Fluorescent Brightener 9
  • Calcofluor White MR
  • C.I. Fluorescent Brightener 9
  • C.I. 40621
  • Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis(5-((4,6-bis(phenylamino)-1,3,5-triazin-2-yl)amino)-, disodium salt
  • Compound 19-28
  • Belophor OD
  • 2,2'-Stilbenedisulfonic acid, 4,4'-bis((4,6-dianilino-s-triazin-2-yl)amino)-, disodium salt
  • OZP 9
  • Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis(5-((4,6-bis(phenylamino)-1,3,5-triazin-2-yl)amino)-, sodium salt (1:2)
  • Brightener ta
  • Phorwite ba
  • Stralex dpa
  • Tinopal tas
  • Brightener br 36
  • 4,4'-Bis((4,6-dianilino-s-triazin-2-yl)amino)-2,2'-stilbenedisulfonic acid disodium salt
  • Disodium 4,4'-bis((4,6-dianilino-1,3,5-triazin-2-yl)amino)stilbene-2,2'-disulfonate
  • Disodium 4,4'-bis((4,6-dianilino-1,3,5-triazin-2-yl)amino)stilbene-2,2'-disulphonate
  • 4,4'-Bis(4,6-dianilino-1,3,5-triazin-2-yl)aminostilbene-2,2'-disulfonate disodium salt
  • CI 40621
  • Disodium 4,4'-bis((2,4-dianilino-1,3,5-triazin-6-yl)amino)-2,2'-stilbenedisulfonate

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
936.95 g/molcalc.
Exact mass
936.1961 Dacalc.
LogP (octanol/water)
2.5calc.
Topological polar surface area
263.9 Ųcalc.
Hydrogen bond donors
6calc.
Hydrogen bond acceptors
18calc.
Rotatable bonds
16calc.
Heavy atoms
66calc.
Rings
8calc.
Aromatic rings
8calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.
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, C(=Cc1ccc(Nc2nc(Nc3ccccc3)nc(Nc3ccccc3)n2)cc1)c1ccc(Nc2nc(Nc3ccccc3)nc(Nc3ccccc3)n2)cc1

C(=Cc1ccc(Nc2nc(Nc3ccccc3)nc(Nc3ccccc3)n2)cc1)c1ccc(Nc2nc(Nc3ccccc3)nc(Nc3ccccc3)n2)cc1

8 rings, 56 atoms.

8 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS classification
Hazard pictograms

Hazard statements

  • H412Harmful to aquatic life with long lasting effects.
Precautionary statements (2)
  • P273Avoid release to the environment.
  • P501Dispose of contents and container in accordance with local regulations.

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

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Cellu-brite 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

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 Cellu-brite is traded under.

HS 3204.20Indicative HS code

Synthetic organic products of a kind used as fluorescent brightening agents

World exports in 2024
$485M
−7.4% vs 2023, imports $474M
2019 to 2024
Top exporters
  1. China31.6%
  2. Germany10.8%
  3. Switzerland * partner reported10.0%
Top importers
  1. United States9.6%
  2. Germany9.1%
  3. Indonesia7.1%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Cellu-brite, based on the data on this page

What is Cellu-brite?

Cellu-brite is a chemical substance with the molecular formula C44H34N12Na2O6S2 and a molar mass of 936.95 g/mol. Its CAS registry number is 133-66-4. The IUPAC name is disodium, 5-[(4,6-dianilino-1,3,5-triazin-2-yl)amino]-2-[(E)-2-[4-[(4,6-dianilino-1,3,5-triazin-2-yl)amino]-2-sulfonatophenyl]ethenyl]benzenesulfonate.

What is the CAS number of Cellu-brite?

The CAS registry number of Cellu-brite is 133-66-4.

What is the molecular formula and weight of Cellu-brite?

The molecular formula of Cellu-brite is C44H34N12Na2O6S2 and its molar mass is 936.95 g/mol.

What is Cellu-brite used for?

Known uses and roles of Cellu-brite include optical brighteners in textiles and leather and optical brighteners in home care and cleaning.

Is Cellu-brite hazardous?

Cellu-brite has a GHS hazard classification. Main hazards: harmful to aquatic life with long lasting effects. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Cellu-brite?

Cellu-brite is usually classified under HS code 320420 (Synthetic organic products of a kind used as fluorescent brightening agents). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Cellu-brite?

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What is the price of Cellu-brite?

Suppliers quote Cellu-brite on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

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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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