Shanghai Nianxing Industrial Co., Ltd
China
Product Name: Diethyl methylenemalonate
Price: Check
Purity: 98.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Shanghai Jizhi Biochemical Technology Co., Ltd
China
Product Name: Diethyl methylenemalonate
Price: ￥288.0/25mg ￥688.0/100mg
Purity: 98.0%
Stocking Period: 3 Day
Contact: Liu jia
Email: 2130147988@qq.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: Propanedioic acid,2-methylene-, 1,3-diethyl ester
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

3377-20-6

3377-20-6 structure

3377-20-6 structure

Name: Diethyl methylenemalonate
Chemical Name: diethyl 2-methylidenepropanedioate
CAS Number: 3377-20-6
Molecular Formula: C₈H₁₂O₄
Molecular Weight: 172.178
Create Date: 2018-03-26 08:00:00
Modify Date: 2025-08-24 14:35:15

Name	diethyl 2-methylidenepropanedioate
Synonyms	2-methylene-malonic acid diethyl ester Diethyl ethylene-1,1-dicarboxylate Propanedioic acid,2-Methylene-,1,3-diethyl ester diethylethoxymethylene malonate Diethyl methylenemalonate methylidenemalonic acid diethyl ester Propanedioic acid, 2-methylene-, diethyl ester diethyl methylidenemalonate Diethyl 2-methylenemalonate Methylenemalonic acid diethyl ester Methylenepropanedioic acid diethyl ester

Density	1.1±0.1 g/cm3
Boiling Point	174.4±13.0 °C at 760 mmHg
Molecular Formula	C₈H₁₂O₄
Molecular Weight	172.178
Flash Point	73.0±18.2 °C
Exact Mass	172.073563
PSA	52.60000
LogP	1.71
Vapour Pressure	1.2±0.3 mmHg at 25°C
Index of Refraction	1.433

CHEMICAL IDENTIFICATION

RTECS NUMBER :: TY1848000

CHEMICAL NAME :: Propanedioic acid, methylene-, diethyl ester

CAS REGISTRY NUMBER :: 3377-20-6

BEILSTEIN REFERENCE NO. :: 1723773

LAST UPDATED :: 199712

DATA ITEMS CITED :: 1

MOLECULAR FORMULA :: C8-H12-O4

MOLECULAR WEIGHT :: 172.20

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD - Lethal dose

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: >500 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: CBCCT* "Summary Tables of Biological Tests," National Research Council Chemical-Biological Coordination Center. (National Academy of Science Library, 2101 Constitution Ave., NW, Washington, DC 20418) Volume(issue)/page/year: 6,147,1954

HS Code	2917190090

Precursor 10
50-00-0 105-53-3 141085-35-0 116279-89-1
150194-66-4 76221-41-5 87-13-8 53084-38-1
40516-46-9 996-82-7
DownStream 10
30379-04-5 29805-59-2 2698-65-9 609-09-6
609-08-5 108-13-4 100-97-0 133-08-4
34762-17-9 31696-00-1

HS Code	2917190090
Summary	2917190090 acyclic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0%

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