Phenylbutazone EP Impurity B

Name: Phenylbutazone EP Impurity B
Brand: Vaqora Chemicals
SKU: VQ-027467

About Phenylbutazone EP Impurity B

Phenylbutazone EP Impurity B (CAS 16860-43-8) is a pharmacopeial impurity of Phenylbutazone offered by Vaqora Chemicals. The compound has the formula C19H20N2O3, corresponding to a molecular weight of 324.4 g/mol. Its systematic (IUPAC) name is 4-butyl-4-hydroxy-1,2-diphenylpyrazolidine-3,5-dione. It is also known as 4-Hydroxyphenylbutazone or Phenylbutazone - Impurity B.

It is supplied as a solid. Keep the vial tightly closed, protected from light and humidity, at the temperature stated on the Certificate of Analysis. It carries the GHS signal word “Danger” with 3 hazard statements. Review the Safety Data Sheet before use.

This Phenylbutazone impurity supports analytical method development and validation (AMV), batch release testing and the impurity sections of ANDA and DMF filings. Typical end-use sectors are pharmaceutical manufacturing and academic and industrial research.

Vaqora Chemicals supplies Phenylbutazone EP Impurity B in 10 mg, 25 mg, 50 mg and 100 mg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

Pharmacopeial method verification
Impurity profiling
QC release testing
ANDA / DMF filings

Industries

Related to Phenylbutazone

View every impurity, metabolite and intermediate we list for Phenylbutazone.

Phenylbutazone impurities

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Phenylbutazone EP Impurity B
Catalogue No.	VQ-027467
CAS Number	16860-43-8
IUPAC name	4-butyl-4-hydroxy-1,2-diphenylpyrazolidine-3,5-dione
Molecular formula	C₁₉H₂₀N₂O₃
Molecular weight	324.4 g/mol
Exact mass	324.1474
Grade	Reference Standard
HSN code	38229090
InChIKey	VTEBWXHYBNAYKI-UHFFFAOYSA-N
SMILES	CCCCC1(C(=O)N(N(C1=O)C2=CC=CC=C2)C3=CC=CC=C3)O
PubChem CID	101102

Physical properties
Physical form	Solid
LogP (XLogP3)	3.5
H-bond donors / acceptors	1 / 3
TPSA	60.9 Å²
Synonyms	4-Hydroxyphenylbutazone, Phenylbutazone - Impurity B, 4-Butyl-4-hydroxy-1,2-diphenyl-3,5-pyrazolidinedione, 3,5-Pyrazolidinedione, 4-butyl-4-hydroxy-1,2-diphenyl-, 4-Hydroxy Phenylbutazone, 1,2-Diphenyl-4-butyl-4-hydroxypyrazolidine-3,5-dione, Phenylbutazone, 4-hydroxy, 4-butyl-4-hydroxy-1,2-diphenyl-pyrazolidine-3,5-dione, 4-Butyl-4-hydroxy-1,2-diphenyl-3,5-pyrazolidinedione #

Safety & hazard information (GHS)

Toxic

Harmful / irritant

Signal word: Danger

Hazard statements

H301Toxic if swallowed
H302Harmful if swallowed
H319Causes serious eye irritation

Precautionary statements: P264, P264 + P265, P270, P280, P301 + P316, P301 + P317, P305 + P351 + P338, P321, P330, P337 + P317, 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 Phenylbutazone EP Impurity B?

The CAS Registry Number of Phenylbutazone EP Impurity B is 16860-43-8. It is also known as 4-Hydroxyphenylbutazone, Phenylbutazone - Impurity B, 4-Butyl-4-hydroxy-1,2-diphenyl-3,5-pyrazolidinedione.

What is the molecular formula and molecular weight of Phenylbutazone EP Impurity B?

Phenylbutazone EP Impurity B has the molecular formula C19H20N2O3 and a molecular weight of 324.4 g/mol. Its IUPAC name is 4-butyl-4-hydroxy-1,2-diphenylpyrazolidine-3,5-dione.

What is Phenylbutazone EP Impurity B used for?

Phenylbutazone EP Impurity B is supplied as a characterised reference material related to Phenylbutazone. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of Phenylbutazone EP Impurity B can I order?

We supply Phenylbutazone EP Impurity B 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 Phenylbutazone EP Impurity B?

Yes. Every lot of Phenylbutazone EP Impurity B 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 Phenylbutazone EP Impurity B be shipped internationally?

Yes. Phenylbutazone EP Impurity B 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.