Lot numbers can be found on the outside label of a product:
3-Chloro-4-methoxybenzaldehyde
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CAS No. 4903-09-7
- Cat. No. CS-W004738
- Purity≥95%
- MDL No.MFCD00016601
*For research and further manufacturing use only, not for direct human use.
Structure of 4903-09-7
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General Information
- CAS No. 4903-09-7
- Cat. No. CS-W004738
- Purity ≥95%
- MDL No. MFCD00016601
- Storage 4°C, stored under nitrogen
- Shipping Room temperature in continental US; may vary elsewhere.
- Molecular Formula C₈H₇ClO₂
- Molecular Weight 170.59
- Synonym(s) 3-CHLORO-4-METHOXYBENZENECARBALDEHYDE
- SMILES COC1=C(Cl)C=C(C=O)C=C1
Description
3-Chloro-4-methoxybenzaldehyde features a chlorine substituent at the meta position and a methoxy group at the para position relative to the aldehyde, delivering enhanced electron-withdrawing character and improved solubility in polar organic solvents. This configuration enables efficient coupling reactions in pharmaceutical intermediates and functional material synthesis.
Application
3-Chloro-4-methoxybenzaldehyde serves as a versatile building block in medicinal chemistry and agrochemical synthesis, enabling efficient access to substituted benzene scaffolds. Its orthogonal functional groups—chlorine and methoxy—facilitate diverse downstream transformations including Suzuki-Miyaura coupling, nucleophilic substitution, and electrophilic aromatic substitution. The aldehyde group provides a key handle for reductive amination, imine formation, and Ugi-type condensations. Bench-stable and readily purified by recrystallization, it supports scalable synthesis with predictable regioselectivity in standard reaction conditions.
Synthesis
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Route1
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In-stock
2420-16-8 -
74-88-4 - ~95%
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In-stock
4903-09-7
References
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Rosales, Carmen Almansa; Gonzalez Gonzalez, Concepcion; Torres Barreda, Maria Carmen Patent: US2003/176481 A1, 2003 ;
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Route2
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In-stock
2420-16-8
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77-78-1
- ~87%
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In-stock
4903-09-7
References
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APTUIT LAURUS PVT LTD; GOTTUMUKKALA, Venkata, Subbaraju; HINDUPUR, Rama, Mohan; MASNA, Mahesh Patent: WO2010/46926 A2, 2010 ; Location in patent: Page/Page column 10 ;
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Route3
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123-11-5 - ~85%
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In-stock
4903-09-7
References
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Ngi, Samuel Inack; Petrignet, Julien; Duwald, Romain; El Hilali, El Mostafa; Abarbri, Mohamed; Duchene, Alain; Thibonnet, Jerome Advanced Synthesis and Catalysis, 2013 , vol. 355, # 14-15 p. 2936 - 2941
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Safety Information
Download SDS|
GHS Pictogram :
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GHS No : GHS07
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Signal Word : Warning
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UN#: N/A
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Class : N/A
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Packing Group : N/A
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Hazard Statements : H315-H319-H335
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Precautionary Statements : P260-P264-P271-P280-P302+P352-P304+P340-P305+P351+P338-P312-P332+P313-P337+P313-P362+P364-P403+P233-P405-P501
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Quality Control
Computational Chemistry Data
- TPSA 26.3
- LogP 2.1611
- H_Acceptors 2
- H_Donors 0
- Rotatable_Bonds 2
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Key Words
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