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Fluorescent Brightener 121

荧光增白剂121

Also known as: C.I. 50510, 3-(4-Chlorophenyl)-1-(4-sulfamoylphenyl)-2-pyrazoline, 4-[3-(4-Chlorophenyl)-4,5-dihydro-1H-pyrazol-1-yl]benzenesulfonamide, Belofor SNPA, Blankophor Man01, Benzenesulfonamide, 4-[3-(4-chlorophenyl)-4,5-dihydro-1H-pyrazol-1-yl]-

Fluorescent Brightener 121 (CAS 2744-49-2) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C15H14ClN3O2S and a molecular weight of 335.80900 g/mol. It is also known as C.I. 50510, 3-(4-Chlorophenyl)-1-(4-sulfamoylphenyl)-2-pyrazoline and 4-[3-(4-Chlorophenyl)-4,5-dihydro-1H-pyrazol-1-yl]benzenesulfonamide. Key properties include a melting point of 218-219ºC, a boiling point of 535.2ºC at 760mmHg, a density of 1.45 and a flash point of 277.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
2744-49-2
Jingsj CID
J-1966465-7
Molecular Formula
C15H14ClN3O2S
Chinese Name
荧光增白剂121
Molecular Weight
335.80900 g/mol
Category
Organic Compounds
Last updated
8/21/2026

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Physicochemical Properties

Melting Point218-219ºC
Boiling Point535.2ºC at 760mmHg
Density1.45
Flash Point277.5ºC

Frequently Asked Questions

What is the CAS number of Fluorescent Brightener 121?

The CAS number of Fluorescent Brightener 121 is 2744-49-2.

What are the molecular formula and molecular weight of Fluorescent Brightener 121?

Fluorescent Brightener 121 has molecular formula C15H14ClN3O2S and molecular weight 335.80900 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Fluorescent Brightener 121 (CAS 2744-49-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1966465-7 (accessed 2026-10-24).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.