4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3… 33549-66-5

Name: 4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3-one
Brand: Vaqora Chemicals
SKU: VQ-041090

About 4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3-one

4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3-one (CAS 33549-66-5) is an API impurity reference standard offered by Vaqora Chemicals. The compound has the formula C4H4Br2N2O, corresponding to a molecular weight of 255.9 g/mol. Its systematic (IUPAC) name is 4,4-dibromo-3-methyl-1H-pyrazol-5-one. Alternative names: 4,4-Dibromo-3-Methyl-2-Pyrazolin-5-one and 4,4-dibromo-3-methyl-1H-pyrazol-5(4H)-one.

The product is provided as a solid. Reference materials should be stored sealed and away from light and moisture, as specified on the accompanying COA. It carries the GHS signal word “Warning” with 3 hazard statements. Review the Safety Data Sheet before use.

This the parent drug substance impurity supports analytical method development and validation (AMV), batch release testing and the impurity sections of ANDA and DMF filings. Our customers for this product work in pharmaceutical manufacturing and academic and industrial research.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Industries

Specifications & identifiers

Chemical identifiers
Product name	4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3-one
Catalogue No.	VQ-041090
CAS Number	33549-66-5
IUPAC name	4,4-dibromo-3-methyl-1H-pyrazol-5-one
Molecular formula	C₄H₄Br₂N₂O
Molecular weight	255.9 g/mol
Exact mass	255.867
Grade	Reference Standard
HSN code	38229090
InChIKey	QQQQLBQGDDSBCA-UHFFFAOYSA-N
SMILES	CC1=NNC(=O)C1(Br)Br
PubChem CID	351503

Physical properties
Physical form	Solid
LogP (XLogP3)	1.1
H-bond donors / acceptors	1 / 2
TPSA	41.5 Å²
Synonyms	4,4-Dibromo-3-Methyl-2-Pyrazolin-5-one, 4,4-dibromo-3-methyl-1H-pyrazol-5(4H)-one, 4,4-Dibromo-5-methyl-2,4-dihydro-3H-pyrazol-3-one, 3H-Pyrazol-3-one, 4,4-dibromo-2,4-dihydro-5-methyl-, 4,4-dibromo-3-methylpyrazol-5-one, 2,4,10-Tribromo methyl benzoate, 4,4-Dibromo-3-methyl-2-pyrazolin-5-one, 98+%

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of 4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3-one?

The CAS Registry Number of 4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3-one is 33549-66-5. It is also known as 4,4-Dibromo-3-Methyl-2-Pyrazolin-5-one, 4,4-dibromo-3-methyl-1H-pyrazol-5(4H)-one, 4,4-Dibromo-5-methyl-2,4-dihydro-3H-pyrazol-3-one.

What is the molecular formula and molecular weight of 4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3-one?

4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3-one has the molecular formula C4H4Br2N2O and a molecular weight of 255.9 g/mol. Its IUPAC name is 4,4-dibromo-3-methyl-1H-pyrazol-5-one.

Which grade and pack sizes of 4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3-one can I order?

We supply 4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3-one in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with 4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3-one?

Yes. Every lot of 4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3-one is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can 4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3-one be shipped internationally?

Yes. 4,4-Dibromo-2,4-dihydro-5-methyl-3H-pyrazol-3-one is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.