5-Chloro-3-methyl-1-phenyl-4-pyrazolecarboxaldehyde

CAS 947-95-5C11H9ClN2OChemical Synthesis

5-Chloro-3-methyl-1-phenyl-4-pyrazolecarboxaldehyde (CAS 947-95-5), a halogenated heterocyclic compound with the molecular formula C11H9ClN2O and a molecular weight of 220.65 g/mol, serves as a valuable intermediate in organic synthesis. Its structure features a pyrazole core substituted with a chlorine atom, a methyl group, a phenyl ring, and a carboxaldehyde functional group, making it a versatile building block for more complex molecules.

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5-Chloro-3-methyl-1-phenyl-4-pyrazolecarboxaldehyde (C11H9ClN2O) — chemical structure, CAS 947-95-5; Chemistry, fine chemical supplied by Tech Serve Solutions

AldehydesBuilding BlocksC10-C12C10-C30+C11Carbonyl CompoundsChemical SynthesisHalogenated HeterocyclesHeterocyclic Building BlocksOrganic Building Blocks

01 /Applications

Organic Synthesis Intermediate

This compound is utilised as a key building block in the synthesis of various organic molecules. The aldehyde functionality allows for a range of chemical transformations, including condensation, oxidation, and reduction reactions.

Heterocyclic Chemistry Research

As a substituted pyrazole derivative, it is employed in academic and industrial research for the development of novel heterocyclic compounds. These structures are often of interest in medicinal chemistry and materials science.

Fine Chemical Synthesis

It is used in the preparation of fine chemicals and complex organic structures requiring a pyrazole scaffold. The presence of both halogen and aldehyde groups offers multiple sites for further functionalization.

02 /Properties

Molecular weight	220.65
Empirical formula	C11H9ClN2O
Assay	99%
Melting point	145-148 °C(lit.)

03 /Safety & handling

GHS hazard pictogram: Harmful / irritant (GHS07) — Harmful / irritant

Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust, fume, gas or vapours
P305IF IN EYES

Protective equipment	dust mask type N95 (US), Eyeshields, Gloves
Water hazard class (WGK, DE)	3
Hazard codes (EU)	Xi
Risk statements (R)	36/37/38
Safety statements (S)	26-36

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

947-95-5

MDL number

MFCD00100755

05 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

06 /Frequently asked questions

What is 5-Chloro-3-methyl-1-phenyl-4-pyrazolecarboxaldehyde used for?

5-Chloro-3-methyl-1-phenyl-4-pyrazolecarboxaldehyde (CAS 947-95-5) is primarily used as an intermediate in organic synthesis and in the research and development of novel heterocyclic compounds.

What is the CAS number and formula for this chemical?

The CAS number is 947-95-5 and the empirical formula is C11H9ClN2O.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies this chemical with an assay of 99%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.

How should 5-Chloro-3-methyl-1-phenyl-4-pyrazolecarboxaldehyde be handled?

This compound is a Warning substance that can cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, and gloves, should be used. Handle in a well-ventilated area or fume hood.