2-cyano-3-methyl-2-butenoic acid methyl ester
[CAS# 6666-75-7]

Identification

• Name: 2-cyano-3-methyl-2-butenoic acid methyl ester
• Synonyms: Methyl 2-cyano-2-(isopropylidene)acetate; Methyl 2-cyano-3-methyl-2-butenoate; Methyl alpha-cyano-alpha-(isopropylidene)acetate; NSC 66529
• Molecular Formula: C₇H₉NO₂
• Molecular Weight: 139.15
• CAS Registry Number: 6666-75-7
• EC Number: 654-655-8

Properties

• Solubility: Sparingly soluble (17 g/L) (25 ºC), Calc.^*
• Density: 1.0605 g/cm³ (25 ºC)^**
• Melting point: 20-21 ºC^***
• Boiling point: 104-105 ºC (14 Torr)^***
• Refractive index: 1.4728 (589.3 nm 25 ºC)^**
• Flash point: 93.4±9.4 ºC, Calc.^*

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

^** Young, Wm. G.; Journal of the American Chemical Society 1944, V66, P810-11.

^*** Scheiber, Johannes; Berichte der Deutschen Chemischen Gesellschaft 1915, V48, P238-66.

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin sensitization	Skin Sens.	1	H317
Acute toxicity	Acute Tox.	4	H302