p-Isobutylstyrene

Name: p-Isobutylstyrene
Brand: Vaqora Chemicals
SKU: VQ-031133

About p-Isobutylstyrene

Vaqora Chemicals supplies p-Isobutylstyrene, an impurity of Ibuprofen registered under CAS number 63444-56-4. The compound has the formula C12H16, corresponding to a molecular weight of 160.25 g/mol. The IUPAC name is 1-ethenyl-4-(2-methylpropyl)benzene. Alternative names: 4-Isobutylstyrene and 1-Isobutyl-4-vinylbenzene.

It is supplied as a solid. Store the standard in its sealed vial, protected from light and moisture, and follow the storage condition printed on the COA. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

Pharmaceutical QC and development laboratories use this impurity standard of Ibuprofen to develop and validate HPLC methods, to set specification limits and to document impurity profiles in ANDA and DMF submissions. It is used across pharmaceutical manufacturing and academic and industrial research.

We offer p-Isobutylstyrene in 10 mg, 25 mg, 50 mg and 100 mg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

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

Industries

Related to Ibuprofen

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

Ibuprofen impurities

Specifications & identifiers

Chemical identifiers
Product name	p-Isobutylstyrene
Catalogue No.	VQ-031133
CAS Number	63444-56-4
IUPAC name	1-ethenyl-4-(2-methylpropyl)benzene
Molecular formula	C₁₂H₁₆
Molecular weight	160.25 g/mol
Exact mass	160.1252
Grade	Reference Standard
HSN code	38229090
InChIKey	VTMSSJKVUVVWNJ-UHFFFAOYSA-N
SMILES	CC(C)CC1=CC=C(C=C1)C=C
PubChem CID	576146

Physical properties
Physical form	Solid
LogP (XLogP3)	4.3
H-bond donors / acceptors	0 / 0
TPSA	0 Å²
Synonyms	4-Isobutylstyrene, 1-Isobutyl-4-vinylbenzene, Benzene, 1-ethenyl-4-(2-methylpropyl)-, p-Isobutylstyrene (stabilized with 1per cent W/W tert-Butylcatechol), 1-(4'-Isobutylphenyl)ethene, 1-isobutyl-4-vinyl-benzene, 1-Isobutyl-4-vinylbenzene #

Safety & hazard information (GHS)

Harmful / irritant

Health hazard

Signal word: Danger

Hazard statements

H227Combustible liquid
H302Harmful if swallowed
H304May be fatal if swallowed and enters airways
H315Causes skin irritation
H317May cause an allergic skin reaction
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P210, P261, P264, P264 + P265, P270, P271, P272, P280, P301 + P316, P301 + P317, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P330, P331, P332 + P317, P333 + P317, P337 + P317, P362 + P364, P370 + P378, P403, P403 + P233

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 p-Isobutylstyrene?

The CAS Registry Number of p-Isobutylstyrene is 63444-56-4. It is also known as 4-Isobutylstyrene, 1-Isobutyl-4-vinylbenzene, Benzene, 1-ethenyl-4-(2-methylpropyl)-.

What is the molecular formula and molecular weight of p-Isobutylstyrene?

p-Isobutylstyrene has the molecular formula C12H16 and a molecular weight of 160.25 g/mol. Its IUPAC name is 1-ethenyl-4-(2-methylpropyl)benzene.

What is p-Isobutylstyrene used for?

p-Isobutylstyrene is supplied as a characterised reference material related to Ibuprofen. 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 p-Isobutylstyrene can I order?

We supply p-Isobutylstyrene 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 p-Isobutylstyrene?

Yes. Every lot of p-Isobutylstyrene 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 p-Isobutylstyrene be shipped internationally?

Yes. p-Isobutylstyrene 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.