Shanghai Nianxing Industrial Co., Ltd
China
Product Name: Tetramethyl-1,3-cyclobutanedione
Price:
Purity: 99.0%
Stocking Period: 10 Day
Contact: Yang

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 1,3-Cyclobutanedione,2,2,4,4-tetramethyl-
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang

Henan Tianfu Chemical Co., Ltd.
China
Product Name: Dimethyl Ketene Dimer
Price: $Inquiry/1kg $Inquiry/25kg $Inquiry/1000kg $Inquiry/10ton
Purity: 99.0%
Stocking Period: Inquiry
Contact: Anson

933-52-8

933-52-8 structure

933-52-8 structure

Name: Tetramethyl-1,3-cyclobutanedione
Chemical Name: Dimethyl Ketene Dimer
CAS Number: 933-52-8
Molecular Formula: C₈H₁₂O₂
Molecular Weight: 140.180
Catalog: Chemical reagent Organic reagent Fatty ketone (including enol)
Create Date: 2018-06-23 13:07:40
Modify Date: 2024-01-08 10:11:54

Name	Dimethyl Ketene Dimer
Synonyms	1,3-Cyclobutanedione, 2,2,4,4-tetramethyl- EINECS 213-269-6 Tetramethylcyclobutane-1,3-dione 2,2,4,4-Tetramethyl-1,3-cyclobutanedione 2,2,4,4-tetramethylcyclobutane-1,3-dione Tetramethyl-1,3-cyclobutanedione MFCD00001331

Density	1.0±0.1 g/cm3
Boiling Point	208.3±15.0 °C at 760 mmHg
Melting Point	114-116 °C(lit.)
Molecular Formula	C₈H₁₂O₂
Molecular Weight	140.180
Flash Point	74.3±17.4 °C
Exact Mass	140.083725
PSA	34.14000
LogP	0.43
Vapour Pressure	0.2±0.4 mmHg at 25°C
Index of Refraction	1.443

CHEMICAL IDENTIFICATION

RTECS NUMBER :: GU1775000

CHEMICAL NAME :: 1,3-Cyclobutanedione, 2,2,4,4-tetramethyl-

CAS REGISTRY NUMBER :: 933-52-8

LAST UPDATED :: 199701

DATA ITEMS CITED :: 2

MOLECULAR FORMULA :: C8-H12-O2

MOLECULAR WEIGHT :: 140.20

WISWESSER LINE NOTATION :: L4V CVTJ B1 B1 D1 D1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Subcutaneous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 308 mg/kg/77W-I

TOXIC EFFECTS :: Tumorigenic - neoplastic by RTECS criteria Tumorigenic - tumors at site of application

REFERENCE :: JNCIAM Journal of the National Cancer Institute. (Washington, DC) V.1-60, 1940-78. For publisher information, see JJIND8. Volume(issue)/page/year: 46,143,1971

Personal Protective Equipment	Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter
Safety Phrases	S24/25
RIDADR	NONH for all modes of transport
WGK Germany	3
RTECS	GU1775000