1-Phenylsemicarbazide

CAS 103-03-7C6H5NHNHCONH2Chemical Synthesis

1-Phenylsemicarbazide (CAS: 103-03-7) is an organic compound with the linear formula C6H5NHNHCONH2 and a molecular weight of 151.17 g/mol. This white to off-white solid serves as a key building block in organic synthesis, particularly for creating heterocyclic compounds. It is frequently employed in the development of novel pyrazole derivatives and related structures with potential applications in various chemical research fields.

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1-Phenylsemicarbazide (C6H5NHNHCONH2) — chemical structure, CAS 103-03-7; Chemistry, fine chemical supplied by Tech Serve Solutions

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01 /Applications

Synthesis of Pyrazole Derivatives

1-Phenylsemicarbazide is utilised in cyclocondensation reactions with specific trihaloalkenones to synthesise substituted 1H-1-phenylpyrazoles. This application is crucial for researchers exploring new heterocyclic scaffolds.

Preparation of Organic Building Blocks

As an organic building block, it facilitates the construction of more complex molecules. Its structure allows for derivatisation and incorporation into diverse chemical syntheses.

Reagent in Chemical Synthesis

This compound functions as a valuable reagent in organic synthesis, enabling the creation of various substituted urea and pyrazole structures. It is used in academic and industrial research laboratories.

02 /Properties

Molecular weight	151.17
Linear formula	C6H5NHNHCONH2
Assay	99%
Solubility	acetone: very soluble(lit.)alcohol: very soluble(lit.)benzene: slightly soluble(lit.)cold water: slightly soluble(lit.)diethyl ether: slightly soluble(lit.)hot water: very soluble(lit.)methanol: very soluble(lit.)
Application	1-Phenylsemicarbazide was used in the synthesis of a series of alkyl(aryl/heteroaryl) substituted 3-trifluoromethyl-1H-1-phenylpyrazoles and alkyl 3-carboxylate analogs by the cyclocondensation reactions with 4-alkoxy-1,1,1-trihaloalk-3-en-2-ones1.
Melting point	171-174 °C(lit.)

03 /Safety & handling

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

Warning

Hazard statements

H302Harmful if swallowed

Protective equipment	dust mask type N95 (US), Eyeshields, Gloves
Water hazard class (WGK, DE)	3
Hazard codes (EU)	Xn
Risk statements (R)	22

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

04 /Identifiers & registry

CAS number

103-03-7

MDL number

MFCD00007942

PubChem substance

24854767

Beilstein registry

743311

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 1-Phenylsemicarbazide (CAS 103-03-7) used for?

1-Phenylsemicarbazide is primarily used as a building block in organic synthesis, notably for the preparation of pyrazole derivatives and other heterocyclic compounds. It also serves as a reagent in various chemical synthesis pathways.

What is the CAS number and chemical formula for 1-Phenylsemicarbazide?

The CAS number for 1-Phenylsemicarbazide is 103-03-7, and its linear chemical formula is C6H5NHNHCONH2.

What grade and purity does Tech Serve Solutions supply for 1-Phenylsemicarbazide?

Tech Serve Solutions supplies 1-Phenylsemicarbazide with an assay of 99%. This product is intended for research and laboratory use. TSS does not represent this product as USP, BP, EP, or any other pharmacopoeia grade.

How should 1-Phenylsemicarbazide be handled safely?

1-Phenylsemicarbazide is classified under GHS07 with the signal word 'Warning' due to H302 (Harmful if swallowed). Appropriate personal protective equipment includes a dust mask type N95 (US), eyeshields, and gloves. Handle in a well-ventilated area.

Is 1-Phenylsemicarbazide available for export?

Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including 1-Phenylsemicarbazide, and can facilitate export orders worldwide.

How can I request a sample or quote for 1-Phenylsemicarbazide?

To request a sample or obtain a quote for 1-Phenylsemicarbazide, please contact our sales department via the website or direct email, providing your specific requirements and shipping details.