Fluorescent brightener 121

4-[5-(4-chlorophenyl)-3,4-dihydropyrazol-2-yl]benzenesulfonamide

CAS: 2744-49-2

Molecular Formula	`C15H14ClN3O2S`
Molecular Weight	335.8 g/mol
LogP	2.7
Topological Polar Surface Area	84.1 A2
Hydrogen Bond Donors	1
Hydrogen Bond Acceptors	5
Rotatable Bonds	3
Exact Mass	335.04953
Heavy Atoms	22
Complexity	515.0

Chemical Identifiers

CAS Number	2744-49-2
SMILES	`C1CN(N=C1C2=CC=C(C=C2)Cl)C3=CC=C(C=C3)S(=O)(=O)N`
InChIKey	`VZTHUHAJEZPWNC-UHFFFAOYSA-N`

📖 Product Overview

Fluorescent brightener 121 (CAS: 2744-49-2) is a chemical compound with molecular formula C15H14ClN3O2S and molecular weight 335.8 g/mol. Its IUPAC systematic name is 4-[5-(4-chlorophenyl)-3,4-dihydropyrazol-2-yl]benzenesulfonamide. LogP 2.7 Topological Polar Surface Area 84.1 A2 Hydrogen Bond Donors 1 Hydrogen Bond Acceptors 5 Rotatable Bonds 3 Exact Mass 335.04953 Heavy Atoms 22 Complexity 515.0 InChI Key: VZTHUHAJEZPWNC-UHFFFAOYSA-N. SMILES: C1CN(N=C1C2=CC=C(C=C2)Cl)C3=CC=C(C=C3)S(=O)(=O)N.

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Safety Data Sheet (MSDS / SDS) View the Laboratory Chemical Safety Summary (LCSS) on PubChem — includes GHS classifications, hazard statements, first aid measures, and handling precautions.

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Frequently Asked Questions

What is the typical lead time for this product?

Lead time typically ranges from 3-7 business days for in-stock items. For larger quantities or custom orders, please contact us for specific lead times.

Can you provide samples for testing?

Yes, we offer sample quantities for quality testing. Please submit an inquiry with your requirements and we will arrange samples accordingly.

What documentation do you provide with the product?

We provide COA (Certificate of Analysis), MSDS (Material Safety Data Sheet), and technical data sheets with each shipment.

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