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Optical brighteners

Belofor KB

Also known as 4,4-bis-(2''-methoxy-4''''-phenylamino-1'''',3'',5''-triazine-6''-ylamino)stilbene-2,2''-disulfonic acid, Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis(5-((4-methoxy-6-(phenylamino)-1,3,5-triazin-2-yl)amino)-, 4,4'-bis((4-anilino-6-methoxy-S-triazin-2-yl)amino)-2,2'-stilbenedisulfonic acid

CAS 7342-13-4Formula C34H30N10O8S2Molar mass 770.81 g/molEC 230-857-8
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Belofor KB chemical structure, C34H30N10O8S2, CAS 7342-13-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
7342-13-4
Formula
C34H30N10O8S2
Molar mass
770.81 g/mol
EC number
230-857-8
HS code
320420
Category
Optical brighteners

What is Belofor KB?

Plain description, key identifiers and synonyms

Belofor KB is a chemical substance with the molecular formula C34H30N10O8S2 and a molar mass of 770.81 g/mol. Its CAS registry number is 7342-13-4. The IUPAC name is 5-[(4-anilino-6-methoxy-1,3,5-triazin-2-yl)amino]-2-[(E)-2-[4-[(4-anilino-6-methoxy-1,3,5-triazin-2-yl)amino]-2-sulfophenyl]ethenyl]benzenesulfonic acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
5-[(4-anilino-6-methoxy-1,3,5-triazin-2-yl)amino]-2-[(E)-2-[4-[(4-anilino-6-methoxy-1,3,5-triazin-2-yl)amino]-2-sulfophenyl]ethenyl]benzenesulfonic acid
CAS number
7342-13-4
EC number
230-857-8
Molecular formula
C34H30N10O8S2
UNII
O0NCT1R16F
InChIKey
ONAMMOQWYFWXJY-BUHFOSPRSA-N
InChI
InChI=1S/C34H30N10O8S2/c1-51-33-41-29(35-23-9-5-3-6-10-23)39-31(43-33)37-25-17-15-21(27(19-25)53(45,46)47)13-14-22-16-18-26(20-28(22)54(48,49)50)38-32-40-30(42-34(44-32)52-2)36-24-11-7-4-8-12-24/h3-20H,1-2H3,(H,45,46,47)(H,48,49,50)(H2,35,37,39,41,43)(H2,36,38,40,42,44)/b14-13+
Canonical SMILES
COc1nc(Nc2ccccc2)nc(Nc2ccc(C=Cc3ccc(Nc4nc(Nc5ccccc5)nc(OC)n4)cc3S(=O)(=O)O)c(S(=O)(=O)O)c2)n1
Isomeric SMILES
COC1=NC(=NC(=N1)NC2=CC(=C(C=C2)/C=C/C3=C(C=C(C=C3)NC4=NC(=NC(=N4)NC5=CC=CC=C5)OC)S(=O)(=O)O)S(=O)(=O)O)NC6=CC=CC=C6

Synonyms

  • 4,4-bis-(2''-methoxy-4''''-phenylamino-1'''',3'',5''-triazine-6''-ylamino)stilbene-2,2''-disulfonic acid
  • Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis(5-((4-methoxy-6-(phenylamino)-1,3,5-triazin-2-yl)amino)-
  • 4,4'-bis((4-anilino-6-methoxy-S-triazin-2-yl)amino)-2,2'-stilbenedisulfonic acid
  • Belotex k
  • 2,2'-Stilbenedisulfonic acid, 4,4'-bis((4-methoxy-6-anilino-s-triazin-2-yl)amino)-
  • 4,4'-Bis(4-methoxy-6-phenylamino-2-s-triazinylamino)-2,2'-stilbenedisulfonic acid
  • 4,4'-Bis[(4-(phenylamino)-6-methoxy-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid
  • 2,2'-Stilbenedisulfonic acid, 4,4'-bis(4-methoxy-6-phenylamino-2-s-triazinylamino)-
  • 4,4'-Bis((4-anilino-6-methoxy-1,3,5-triazin-2-yl)amino)stilbene-2,2'-disulphonic acid
  • 5-[(4-anilino-6-methoxy-1,3,5-triazin-2-yl)amino]-2-[(E)-2-[4-[(4-anilino-6-methoxy-1,3,5-triazin-2-yl)amino]-2-sulfophenyl]ethenyl]benzenesulfonic acid
  • 4,4'-Bis(2-methoxy-4-anilino-S-triazin-6-ylamino)-2,2'-stilbenedisulfonic acid
  • 4,4'-Bis(4-anilino-6-methoxy-s-triazin-2-ylamino)-2,2'-stilbenedisulfonic acid
  • (E)-6,6'-(ethene-1,2-diyl)bis(3-((4-methoxy-6-(phenylamino)-1,3,5-triazin-2-yl)amino)benzenesulfonic acid)
  • 4,4'-Bis((4-phenylamino-6-methoxy-1,3,5-triazin-2-yl)amino)stilbene-2,2'-disulfonic 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
770.81 g/molcalc.
Exact mass
770.169 Dacalc.
LogP (octanol/water)
5.71calc.
Topological polar surface area
252.7 Ųcalc.
Hydrogen bond donors
6calc.
Hydrogen bond acceptors
16calc.
Rotatable bonds
14calc.
Heavy atoms
54calc.
Rings
6calc.
Aromatic rings
6calc.
Fraction sp3 carbons
0.06calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Fails (4 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(Nc2ncnc(Nc3ccccc3)n2)cc1)c1ccc(Nc2ncnc(Nc3ccccc3)n2)cc1

C(=Cc1ccc(Nc2ncnc(Nc3ccccc3)n2)cc1)c1ccc(Nc2ncnc(Nc3ccccc3)n2)cc1

6 rings, 42 atoms.

135 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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Belofor KB price

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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 Belofor KB 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 Belofor KB is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Belofor KB, based on the data on this page

What is Belofor KB?

Belofor KB is a chemical substance with the molecular formula C34H30N10O8S2 and a molar mass of 770.81 g/mol. Its CAS registry number is 7342-13-4. The IUPAC name is 5-[(4-anilino-6-methoxy-1,3,5-triazin-2-yl)amino]-2-[(E)-2-[4-[(4-anilino-6-methoxy-1,3,5-triazin-2-yl)amino]-2-sulfophenyl]ethenyl]benzenesulfonic acid.

What is the CAS number of Belofor KB?

The CAS registry number of Belofor KB is 7342-13-4.

What is the molecular formula and weight of Belofor KB?

The molecular formula of Belofor KB is C34H30N10O8S2 and its molar mass is 770.81 g/mol.

What is Belofor KB used for?

Known uses and roles of Belofor KB include optical brighteners in textiles and leather and optical brighteners in home care and cleaning.

Is Belofor KB hazardous?

No GHS hazard classification for Belofor KB 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 Belofor KB?

Belofor KB 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 Belofor KB?

Post a free request on CompoundList and suppliers of Belofor KB will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Belofor KB?

Suppliers quote Belofor KB 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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