Isobutylene Oxide

Name: Isobutylene Oxide
Brand: Vaqora Chemicals
SKU: VQ-039077

About Isobutylene Oxide

Isobutylene Oxide (CAS 558-30-5) is an impurity of N methylpyrrolidone offered by Vaqora Chemicals. The compound has the formula C4H8O, corresponding to a molecular weight of 72.11 g/mol. Its systematic (IUPAC) name is 2,2-dimethyloxirane. Alternative names: 1,1-Dimethyloxirane and Isobutene oxide.

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. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

This N methylpyrrolidone 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.

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

Typical applications

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

Industries

Related to N methylpyrrolidone

View every impurity, metabolite and intermediate we list for N methylpyrrolidone.

N methylpyrrolidone impurities

Specifications & identifiers

Chemical identifiers
Product name	Isobutylene Oxide
Catalogue No.	VQ-039077
CAS Number	558-30-5
IUPAC name	2,2-dimethyloxirane
Molecular formula	C₄H₈O
Molecular weight	72.11 g/mol
Exact mass	72.0575
Grade	Reference Standard
HSN code	38229090
InChIKey	GELKGHVAFRCJNA-UHFFFAOYSA-N
SMILES	CC1(CO1)C
PubChem CID	11208

Physical properties
Physical form	Solid
LogP (XLogP3)	0.5
H-bond donors / acceptors	0 / 1
TPSA	12.5 Å²
Synonyms	1,1-Dimethyloxirane, Isobutene oxide, 1,2-Epoxyisobutane, Isobutylene epoxide, Oxirane, 2,2-dimethyl-, 2-Methyl-1,2-epoxypropane, 1,2-Isobutylene oxide, 1,1-Dimethylethylene oxide, 2-Methyl-1-propene oxide, Propane, 1,2-epoxy-2-methyl-, 2-MEP

Safety & hazard information (GHS)

Flammable

Corrosive

Harmful / irritant

Health hazard

Signal word: Danger

Hazard statements

H225Highly flammable liquid and vapor
H314Causes severe skin burns and eye damage
H318Causes serious eye damage
H335May cause respiratory irritation
H341Suspected of causing genetic defects
H351Suspected of causing cancer

Precautionary statements: P203, P210, P233, P240, P241, P242, P243, P260, P261, P264, P264 + P265, P271, P280, P301 + P330 + P331, P302 + P361 + P354, P303 + P361 + P353, P304 + P340, P305 + P354 + P338, P316, P317, P318, P319, P321, P363

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 Isobutylene Oxide?

The CAS Registry Number of Isobutylene Oxide is 558-30-5. It is also known as 1,1-Dimethyloxirane, Isobutene oxide, 1,2-Epoxyisobutane.

What is the molecular formula and molecular weight of Isobutylene Oxide?

Isobutylene Oxide has the molecular formula C4H8O and a molecular weight of 72.11 g/mol. Its IUPAC name is 2,2-dimethyloxirane.

What is Isobutylene Oxide used for?

Isobutylene Oxide is supplied as a characterised reference material related to N methylpyrrolidone. 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 Isobutylene Oxide can I order?

We supply Isobutylene Oxide 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 Isobutylene Oxide?

Yes. Every lot of Isobutylene Oxide 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 Isobutylene Oxide be shipped internationally?

Yes. Isobutylene Oxide 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.