Crotonaldehyde, 99%

About Crotonaldehyde, 99%

Crotonaldehyde is a carbonyl building block (Synthesis grade) carrying the CAS registry number 123-73-9 with a typical assay of 99%. The compound has the formula C4H6O, corresponding to a molecular weight of 70.09 g/mol. The IUPAC name is (E)-but-2-enal. Common synonyms include Crotoinic aldehyde and β-Methacrolein.

It is supplied as a liquid. Literature values give a density of 0.846 g/cm3. Keep containers tightly closed in a cool, well-ventilated area away from heat and ignition sources. It carries the GHS signal word “Danger” with 9 hazard statements. Review the Safety Data Sheet before use.

Typical applications include organic synthesis, condensation and reductive amination, API intermediates and fine chemical synthesis. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

Available in 500 mL, 5 kg, 4 x 25 kg and 160 kg packs, Crotonaldehyde is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Organic synthesis
Condensation & reductive amination
API intermediates
Fine chemical synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Crotonaldehyde, 99%
Catalogue No.	VQ-008102
CAS Number	123-73-9
IUPAC name	(E)-but-2-enal
Molecular formula	C₄H₆O
Molecular weight	70.09 g/mol
Exact mass	70.0419
Grade	Synthesis
Purity / assay	99%
HSN code	29121910
InChIKey	MLUCVPSAIODCQM-NSCUHMNNSA-N
SMILES	C/C=C/C=O
PubChem CID	447466

Physical properties
Physical form	Liquid
Appearance	Liquid
Density	0.846 g/cm3
LogP (XLogP3)	0.5
H-bond donors / acceptors	0 / 1
TPSA	17.1 Å²
UN number	UN 1143
Synonyms	Crotoinic aldehyde, β-Methacrolein, 2-Butenal, Crotonal, (2E)-but-2-enal, Crotonic aldehyde, Methylpropenal, 1-Formylpropene, beta-Methylacrolein, Propylene aldehyde, 2-Butenaldehyde, beta-Methyl acrolein

Safety & hazard information (GHS)

Flammable

Corrosive

Toxic

Health hazard

Environmental hazard

Signal word: Danger

Hazard statements

H225Highly flammable liquid and vapor
H301Toxic if swallowed
H311Toxic in contact with skin
H315Causes skin irritation
H318Causes serious eye damage
H330Fatal if inhaled
H335May cause respiratory irritation
H341Suspected of causing genetic defects
H400Very toxic to aquatic life

Precautionary statements: P203, P210, P233, P240, P241, P242, P243, P260, P261, P262, P264, P264 + P265, P270, P271, P273, P280, P284, P301 + P316, P302 + P352, P303 + P361 + P353, P304 + P340, P305 + P354 + P338, P316, P317

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 Crotonaldehyde, 99%?

The CAS Registry Number of Crotonaldehyde, 99% is 123-73-9. It is also known as Crotoinic aldehyde, β-Methacrolein, 2-Butenal.

What is the molecular formula and molecular weight of Crotonaldehyde, 99%?

Crotonaldehyde, 99% has the molecular formula C4H6O and a molecular weight of 70.09 g/mol. Its IUPAC name is (E)-but-2-enal.

Which grade and pack sizes of Crotonaldehyde, 99% can I order?

We supply Crotonaldehyde, 99% in Synthesis (99%) grade, in 500 mL, 5 kg, 4 x 25 kg, 160 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Crotonaldehyde, 99%?

Yes. Every lot of Crotonaldehyde, 99% 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 Crotonaldehyde, 99% be shipped internationally?

Yes. Crotonaldehyde, 99% is classified as hazardous (UN 1143), 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.