Diethyl ethoxymethylenemalonate suppliers

Diethyl ethoxymethylenemalonate

CAS:: 87-13-8

MF:: C10H16O5

MW:: 216.23

SecurityInformation

Symbol(GHS) ：: GHS07,GHS09

Signal word ：: Warning

Hazard statements ：: H302-H315-H317-H319-H410

Precautionary statements ：: P261-P273-P280-P301+P312-P302+P352-P305+P351+P338

Hazard Codes ：: Xn

Risk Statements ：: 22-36/37/38-42/43

Safety Statements ：: 26-36/37/39-27-24/25

WGK Germany ：: 1

RTECS ：: OO1100000

Autoignition Temperature：: 215 °C

TSCA ：: Yes

HS Code ：: 29189090

Toxicity：: LD50 orally in Rabbit: 925 mg/kg LD50 dermal Rat > 2000 mg/kg

Use：: Likely impurity is diethyl diethoxymethylene malonate which is difficult to separate from diethyl ethoxymethylene malonate by distillation, and it is necessary to follow the course of the distillation by the change in refractive index instead of boiling point. After a low boiling fraction is collected, there is obtained an intermediate fraction (n 20 1.414—1.458), the size of which depends on the amount of the diethoxymethylene compound. This fraction is fractionated through a 5inch Vigreux column (p 11) at low pressure avoiding interruption in heating. Fraction b 108-110o/0.25mm is ca 10o lower than the submitters' fraction (b 97.2o/0.25mm, n D 1.4612—1.4623) [Org Synth Coll Vol III 395 1955, Fuson et al. J Org Chem 11 197 1946, Duff & Kendal J Chem Soc 893 1948]. [Beilstein 3 IV 1192.]

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Hangzhou ICH Biofarm Co., Ltd