33689-28-0

Basic information

• Product Name: 1,2-Cyclobutanedione
• Synonyms: 1,2-Cyclobutanedione
• CAS NO: 33689-28-0
• Molecular Formula: C₄H₄O₂
• Molecular Weight: 84.07336
• Mol File: 33689-28-0.mol
• Article Data: 4

Chemical Properties

• Boiling Point: 155.7°Cat760mmHg
• Flash Point: 48°C
• Appearance: /
• Density: 1.314g/cm³
• Vapor Pressure: 3mmHg at 25°C
• Refractive Index: 1.496
• CAS DataBase Reference: 1,2-Cyclobutanedione(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2-Cyclobutanedione(33689-28-0)
• EPA Substance Registry System: 1,2-Cyclobutanedione(33689-28-0)

Safety Data

• Hazardous Substances Data: 33689-28-0(Hazardous Substances Data)

Usage

General Description

1,2-Cyclobutanedione is a chemical compound with the formula C4H6O2. It is a cyclic diketone and is also known as trimethylenedione. 1,2-Cyclobutanedione is a colorless liquid at room temperature with a boiling point of 130 degrees Celsius. It is used as a building block in organic synthesis and can also undergo various reactions to form a range of other compounds. It is a highly reactive chemical and should be handled with care due to its potential for combustion and reactivity with other chemicals. 1,2-Cyclobutanedione is not commonly found in nature and is primarily produced synthetically for use in various industrial and research applications.

InChI:InChI=1/C4H4O2/c5-3-1-2-4(3)6/h1-2H2

Upstream product

• 17082-61-0 1,2-bis(trimethylsiloxy)cyclobutene 
• 15506-53-3 cyclobutane-1,3-dione 
• 109-89-7 diethylamine 
• 141-52-6 sodium ethanolate 
• 98-94-2 N,N-dimethyl-cyclohexanamine 
• 19293-63-1 dicyclohexylmethylamine 
• 101-83-7 N-cyclohexyl-cyclohexanamine 
• 75-77-4 chloro-trimethyl-silane 
• 106-65-0 Dimethyl succinate 

Downstream Products

• 59895-25-9 cis-diallyl-1,2-cyclobutandiol-1,2 
• 74-85-1 ethene 
• 59895-27-1 cis-1,2-diphenyl-1,2-cyclobutanediol 
• 35358-38-4 cis-1,2-Diethyl-cyclobutan-1,2-diol 
• 35358-37-3 1,2-dimethyl-cyclobutane-cis-1,2-diol 
• 17994-25-1 1-Hydroxy-1-cyclopropanecarboxylic acid 
• 201230-82-2 carbon monoxide 
• 94618-65-2 (E,E)-1,2-dibenzylidenecyclobutane 
• 74725-45-4 (E)-2-benzylidenecyclobutan-1-one 
• 33689-29-1 1-hydroxy-cyclopropanecarboxylic acid methyl ester 
• 42206-10-0 Bicyclo<4.2.0>octa-1,5-dien 

Relevant articles and documents

3-hydroxy-2-cyclobuten-1-one salts, their production and use

3-Hydroxy-2-cyclobuten-1-one salts of the general formula: STR1 wherein R is an ammonium group of the general formula: STR2 wherein R1, R2 and R3 are the same or different in meaning and each is a hydrogen atom, a lower alkyl group or a cycloalkyl group or R is an alkali metal atom. The salts according for formula I are obtained by the reaction of pure 3-acetoxy-2-cyclobuten-1-one, or 1,3-cyclobutanedione or a distillation residue of the diketene production containing 3-acetoxy-2-cyclobuten-1-one, with a base. The base can be an amine of the general formula: STR3 wherein R1, R2, and R3 have the above-mentioned meaning, or an alkali metal alcoholate or an alkali metal hydroxide. The salts according to formula I are suitable for the production of squaric acid, by their being halogenated in a first step and then being hydrolyzed to squaric acid in a second step.

1,2-Cyclobutanedione

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