4-Isobutylbenzoic acid

Name: 4-Isobutylbenzoic acid
Brand: Vaqora Chemicals
SKU: VQ-026113

About 4-Isobutylbenzoic acid

Listed under CAS 38861-88-0, 4-Isobutylbenzoic acid is an impurity of Ibuprofen available from Vaqora Chemicals. The compound has the formula C11H14O2, corresponding to a molecular weight of 178.23 g/mol. Systematically, it is named 4-(2-methylpropyl)benzoic acid. It is also known as Benzoic acid, 4-(2-methylpropyl)- or BENZOIC ACID, p-ISOBUTYL-.

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. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

This Ibuprofen impurity supports analytical method development and validation (AMV), batch release testing and the impurity sections of ANDA and DMF filings. It is used across 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

Related to Ibuprofen

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

Ibuprofen impurities

Specifications & identifiers

Chemical identifiers
Product name	4-Isobutylbenzoic acid
Catalogue No.	VQ-026113
CAS Number	38861-88-0
IUPAC name	4-(2-methylpropyl)benzoic acid
Molecular formula	C₁₁H₁₄O₂
Molecular weight	178.23 g/mol
Exact mass	178.0994
Grade	Reference Standard
HSN code	38229090
InChIKey	VUBBCFWWSKOHTH-UHFFFAOYSA-N
SMILES	CC(C)CC1=CC=C(C=C1)C(=O)O
PubChem CID	38111

Physical properties
Physical form	Solid
LogP (XLogP3)	3.7
H-bond donors / acceptors	1 / 2
TPSA	37.3 Å²

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed

Precautionary statements: P264, P270, P301 + P317, P330, 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-Isobutylbenzoic acid?

The CAS Registry Number of 4-Isobutylbenzoic acid is 38861-88-0. It is also known as Benzoic acid, 4-(2-methylpropyl)-, BENZOIC ACID, p-ISOBUTYL-, p-isobutylbenzoic acid.

What is the molecular formula and molecular weight of 4-Isobutylbenzoic acid?

4-Isobutylbenzoic acid has the molecular formula C11H14O2 and a molecular weight of 178.23 g/mol. Its IUPAC name is 4-(2-methylpropyl)benzoic acid.

What is 4-Isobutylbenzoic acid used for?

4-Isobutylbenzoic acid 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 4-Isobutylbenzoic acid can I order?

We supply 4-Isobutylbenzoic acid 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-Isobutylbenzoic acid?

Yes. Every lot of 4-Isobutylbenzoic acid 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-Isobutylbenzoic acid be shipped internationally?

Yes. 4-Isobutylbenzoic acid 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.