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933-52-8

Basic Information
CAS No.: 933-52-8
Name: TETRAMETHYL-1,3-CYCLOBUTANEDIONE
Article Data: 47
Molecular Structure:
Molecular Structure of 933-52-8 (TETRAMETHYL-1,3-CYCLOBUTANEDIONE)
Formula: C8H12 O2
Molecular Weight: 140.182
Synonyms: 1,3-Cyclobutanedione,tetramethyl- (6CI); 2,2,4,4-Tetramethyl-1,3-cyclobutanedione;2,2,4,4-Tetramethylcyclobutanedione; NSC 46472; NSC 72172;Tetramethyl-1,3-cyclobutanedione; Tetramethylcyclobuta-1,3-dione
Density: 0.995g/cm3
Melting Point: 114-116 °C(lit.)
Boiling Point: 95-159 °C750 mm Hg(lit.)
Flash Point: 74.3°C
Appearance: white crystalline powder
Safety: Questionable carcinogen with experimental neoplastigenic data. When heated to decomposition it emits acrid smoke and irritating fumes.
PSA: 34.14000
LogP: 1.19060
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Chemistry

IUPAC Name: 2,2,4,4-Tetramethylcyclobutane-1,3-dione
The MF of Tetramethyl-1,3-cyclobutanedione (CAS NO.933-52-8) is C8H12O2.

                                          
The MW of Tetramethyl-1,3-cyclobutanedione (CAS NO.933-52-8) is 140.18.
Synonyms of Tetramethyl-1,3-cyclobutanedione (CAS NO.933-52-8): 1,3-Cyclobutanedione, 2,2,4,4-tetramethyl- ; 2,2,4,4-Tetramethyl-1,3-cyclobutanedione ; Tetramethyl-1,3-cyclobutanedione ; Tetramethylcyclobutane-1,3-dione
Product Categories: Organics;Cyclobutanes & Cyclobutenes;Simple 4-Membered Ring Compounds;C7 to C8;Carbonyl Compounds;Ketones
Apperance: white crystalline powder
Index of Refraction: 1.443 
EINECS: 213-269-6
Density: 0.995 g/ml
Flash Point: 74.3 °C
Boiling Point: 208.3 °C
Melting Point: 112-115 °C

Uses

  Tetramethyl-1,3-cyclobutanedione (CAS NO.933-52-8) is used as chemical reagents, organic intermediates, fine chemicals, pharmaceutical research and development.

Toxicity Data With Reference

1.    

scu-mus TDLo:308 mg/kg/77W-I:NEO

    JNCIAM    Journal of the National Cancer Institute. 46 (1971),143.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Questionable carcinogen with experimental neoplastigenic data. When heated to decomposition it emits acrid smoke and irritating fumes.Safety information of Tetramethyl-1,3-cyclobutanedione (CAS NO.933-52-8):
Safety Statements 
24/25 Avoid contact with skin and eyes
WGK Germany  3
RTECS  GU1775000