8.22002

Crotonic anhydride

(mixture of cis and trans isomers) for synthesis

• Synonym(s): Crotonic anhydride, 2-Butenoic anhydride
• Linear Formula: (CH₃CH=CHCO)₂O
• CAS Number: 623-68-7
• Molecular Weight: 154.16
• MDL number: MFCD00009286
• UNSPSC Code: 12352106
• EC Index Number: 210-807-1
• NACRES: NA.22

Properties

• Product Name: Crotonic anhydride, (mixture of cis and trans isomers) for synthesis
• SMILES string: O(C(=O)\C=C\C)C(=O)\C=C\C
• InChI: 1S/C8H10O3/c1-3-5-7(9)11-8(10)6-4-2/h3-6H,1-2H3/b5-3+,6-4+
• InChI key: VJDDQSBNUHLBTD-GGWOSOGESA-N
• vapor pressure: 1 hPa ( 25 °C)
• form: liquid
• autoignition temp.: 290 °C
• potency: 2061 mg/kg LD₅₀, oral (Rat)
• bp: 250 °C
• mp: -20 °C
• transition temp: flash point 113 °C
• density: 1.04 g/cm³ at 20 °C
• storage temp.: 2-30°C
• Quality Level: 200

Description

Analysis Note

Assay isomers (GC, area%): ≥ 95.5 % (a/a)
Density (d 20 °C/ 4 °C): 1.038 - 1.040
Identity (IR): passes test

General description

Crotonic anhydride is also known as 2-butenoic anhydride is commonly used as a precursor in the synthesis of polymers. Its reactive anhydride group makes it an effective acylating agent in esterification reactions, facilitating the formation of esters by reacting with alcohols.

Safety Information

• pictograms: GHS05,GHS09
• signalword: Danger
• hcodes: H314 - H400
• pcodes: P273 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 - P363
• Hazard Classifications: Aquatic Acute 1 - Eye Dam. 1 - Skin Corr. 1B
• Storage Class: 8A - Combustible, corrosive hazardous materials
• wgk: WGK 3
• flash_point_f: 235.4 °F
• flash_point_c: 113 °C