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Chemical Name:
Topanel;BUTENAL;Crotonal;topanelca;2-BUTENAL;Bu-2-tenal;NCI-C56279;Topanel CA;t-2-Butenal;2-BUTEN-1-AL
Molecular Formula:
Formula Weight:
MOL File:

Crotonaldehyde Properties

Melting point:
−76 °C(lit.)
Boiling point:
104 °C(lit.)
0.853 g/mL at 20 °C(lit.)
vapor density 
2.41 (vs air)
vapor pressure 
32 mm Hg ( 20 °C)
refractive index 
n20/D 1.437
Flash point:
48 °F
storage temp. 
water: soluble425.4g/L at 20°C
explosive limit
Water Solubility 
150 g/L (20 ºC)
CAS DataBase Reference
123-73-9(CAS DataBase Reference)
NIST Chemistry Reference
EPA Substance Registry System
2-Butenal, (2E)-(123-73-9)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  F,T+,N
Risk Statements  11-24/25-26-37/38-41-48/22-50-68-R68-R50-R48/22-R41-R37/38-R26-R24/25-R11
Safety Statements  26-28-36/37/39-45-61-28A-S61-S45-S36/37/39-S28A-S26-16
RIDADR  UN 1143 6.1/PG 1
WGK Germany  3
RTECS  GP9625000
HazardClass  6.1
PackingGroup  I
Hazardous Substances Data 123-73-9(Hazardous Substances Data)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
H330 Fatal if inhaled Acute toxicity,inhalation Category 1, 2 Danger P260, P271, P284, P304+P340, P310,P320, P403+P233, P405, P501
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
H341 Suspected of causing genetic defects Germ cell mutagenicity Category 2 Warning P201,P202, P281, P308+P313, P405,P501
H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501
H400 Very toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 1 Warning P273, P391, P501
Precautionary statements:
P201 Obtain special instructions before use.
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P370+P378 In case of fire: Use … for extinction.

Crotonaldehyde price More Price(3)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 262668 Crotonaldehyde, predominantly trans ≥99%, contains 0.1-0.2% BHT as stabilizer, 1% H 123-73-9 5ml $37.4 2018-11-20 Buy
Sigma-Aldrich 262668 Crotonaldehyde, predominantly trans ≥99%, contains 0.1-0.2% BHT as stabilizer, 1% H 123-73-9 1l $198 2018-11-20 Buy
Sigma-Aldrich 262668 Crotonaldehyde, predominantly trans ≥99%, contains 0.1-0.2% BHT as stabilizer, 1% H 123-73-9 100ml $46.5 2018-11-20 Buy

Crotonaldehyde Chemical Properties,Uses,Production

Chemical Properties

clear liquid

General Description

Water-white to straw-colored liquid with a pungent, suffocating odor. Used as a chemical intermediate in a variety of industrial processes (surfactants, textiles, paper, fuels, insecticides, leather tanning, etc.). Used in chemical warfare.

Air & Water Reactions

Highly flammable.

Reactivity Profile

Crotonaldehyde is an aldehyde. Crotonaldehyde can react violently with strong oxidizing reagents, e.g., reaction with conc. nitric acid leads to instantaneous ignition [Andrussow, L., Chim. Ind. (Paris), 1961, 86, p. 542]. In contact with strong acids or bases Crotonaldehyde will undergo an exothermic condensation reaction. Reaction with 1,3-butadiene is particularly violent [Greenlee, K. W., Chem. Eng. News, 1948, 26, p. 1985]. Crotonaldehyde may rapidly polymerize with ethyl acetoacetate (Soriano, D.S. et al. 1988. Journal of Chemical Education 65:637.).

Health Hazard

Although slightly less toxic, crotonaldehyde is similar chemically and toxicologically to acrolein, which is rated as extremely toxic. Toxic concentrations for human inhalation have been reported at 12 mg/m3/10 minutes. Irritant dose to human eye is 45 ppm. As with acrolein, vapor exposures cause severe and painful eye irritation, damage to cornea, lacrimation (tearing), irritation of nasal membranes, pulmonary edema (filling of lungs with fluid) and gastrointestinal distress when ingested.

Fire Hazard

Vapors form explosive mixtures in air or in sewers. Hazardous peroxides and acids emitted when heated to decomposition. Avoid nitric acid. Unstable, avoid oxygen, heat, elevated pressures. Hazardous polymerization may occur. Avoid contact with alkaline materials such as caustic ammonia or amines, or at elevated temperatures.

Crotonaldehyde Preparation Products And Raw materials

Raw materials

Preparation Products

Crotonaldehyde Suppliers

Global( 122)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Mainchem Co., Ltd.
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Shanghai YuMei Pharmaceutical Chemical Co., Ltd. 13671802554
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Shanghai Na Qian Chemical Technology Co. Ltd. 13598610367,0373-7129549,QQ: 1279719341,2503280341,2841375912
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JinYan Chemicals(ShangHai) Co.,Ltd. 13817811078,021-50426030
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Accela ChemBio Co.,Ltd. 400-066-5055
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Shanghai Hanhong Scientific Co.,Ltd. 021-54306202,021-54308259
+86-21-54291107 China 43423 64
Chengdu XiYa Chemical Technology Co., Ltd. 4008-626-111
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Syntechem Co.,Ltd Please Email
E-Mail Inquiry China 13092 57
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028-85973075 China 9968 57
China Langchem Inc. 0086-21-58956006,021-58950017
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