Tetramethyl-1,3-cyclobutanedione
[CAS# 933-52-8]

Identification

• Classification: Chemical reagent >> Organic reagent >> Fatty ketone (including enol)
• Name: Tetramethyl-1,3-cyclobutanedione
• Synonyms: 2,2,4,4-Tetramethyl-1,3-cyclobutanedione; 2,2,4,4-Tetramethylcyclobutanedione; NSC 46472; NSC 72172
• Molecular Formula: C₈H₁₂O₂
• Molecular Weight: 140.18
• CAS Registry Number: 933-52-8
• EC Number: 213-269-6

Properties

• Solubility: Sparingly soluble (29 g/L) (25 ºC), Calc.^*
• Density: 0.995±0.06 g/cm³ (20 ºC 760 Torr), Calc.^*
• Melting point: 114-115 ºC^**
• Boiling point: 76.5-78.5 ºC^***
• Refractive index: 1.4368 (589.3 nm 20 ºC)^***
• Flash point: 74.3±17.4 ºC, Calc.^*

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2016 ACD/Labs)

^** Paetzold, Peter; Chemische Berichte 1979, V112(2), P663-77.

^*** Elam, Edward U.; FR 1412855 1965.

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Eye irritation	Eye Irrit.	2A	H319
Skin irritation	Skin Irrit.	2	H315
Specific target organ toxicity - single exposure	STOT SE	3	H335