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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 643756Generated: October 23, 2026

2-Butenoic acid, 3-amino-, ethyl ester, (2Z)-

(Z)-3-aminobut-2-enoate · (Z)-ETHYL 3-AMINOBUT-2-ENOATE · Ethyl (2Z)-3-amino-2-butenoate · AURORA KA-7376 · Ethyl 3-aMinocroton · 3-amino-2-hexenoate · ETHYL 3-AMINOCROTONA · Impurity of nifedipine

https://huagongshe.com/en/chemical/643756

2-Butenoic acid, 3-amino-, ethyl ester, (2Z)- molecular structure

Identifiers & Physical Properties

CAS No.626-34-6
Molecular formulaC6H11NO2
Average molar mass129.16 g/mol
SMILESCCOC(=O)/C=C(/C)N
InChIKeyYPMPTULBFPFSEQ-PLNGDYQASA-N
PubChem CID643756

Chemical & Physical Properties

XLogP1
Topological polar surface area52.3
Hydrogen bond donors1
Hydrogen bond acceptors3
Rotatable bonds3
Heavy atoms9
Formal charge0
Complexity129
Melting point33-35 °C (lit.)
Boiling point210-215 °C (lit.)
Density1.022 g/mL at 25 °C (lit.)
Refractive index1.4990
Flash point207 °F
Storage conditionsKeep in dark place,Inert atmosphere,Room temperature
pKa (acidity coefficient)5.32±0.70(Predicted)
AppearanceOff-white to light yellow 35°C Liquid
SolubilitySoluble in water (26 g/L) (25°C).
SensitivityAir & Moisture Sensitive & Hygroscopic
BRN471284
InChIInChI=1S/C6H11NO2/c1-3-9-6(8)4-5(2)7/h4H,3,7H2,1-2H3/b5-4-
InChIKeyYPMPTULBFPFSEQ-PLNGDYQASA-N
SMILESC(OCC)(=O)/C=C(\N)/C
LogP (partition coefficient)0.390 (est)
CAS DataBase Reference626-34-6(CAS DataBase Reference)
UNSPSC Code41116107
NACRESNA.24
GHS pictogramGHS05,GHS07
Signal wordDanger
GHS hazard statementsH314-H335
GHS precautionary statementsP260-P271-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
Target organsRespiratory system
Personal protective equipment (PPE)Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter
Hazard symbolsC
Risk statements (R)34-36/37
Safety statements (S)26-27-28-36/37/39-45
UN transport numberUN 3263 8/PG 2
Water hazard class (WGK)3
Hazard class8Eye Dam. 1Skin Corr. 1BSTOT SE 3
Packing groupIII
Customs code29224999
Storage class8A - Combustible corrosive hazardous materials
Limited quantities1.0 L (0.3 gallons) (liquid) or 1 Kg (2.2 lbs) (solid)
Excepted quantitiesMax Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml)

Safety & Regulations

Regulatory information2-Butenoic acid, 3-amino-, ethyl ester, (2Z)-: Does not have an individual approval but may be used under an appropriate group standard
Personal protective equipment (PPE)Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter
Water hazard class (WGK)3
UN transport numberUN 3263 8/PG 2
Customs code29224999
Risk statements (R)34-36/37
Signal wordDanger
GHS pictogramGHS05,GHS07
Hazard symbolsC
Safety statements (S)26-27-28-36/37/39-45
Hazard class8Eye Dam. 1Skin Corr. 1BSTOT SE 3
Storage class8A - Combustible corrosive hazardous materials
Packing groupIII
Target organsRespiratory system
GHS hazard statementsH314-H335
Limited quantities1.0 L (0.3 gallons) (liquid) or 1 Kg (2.2 lbs) (solid)
Excepted quantitiesMax Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml)
GHS precautionary statementsP260-P271-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338

Applications & Uses

Uses

Ethyl 3-aminocrotonate, is used as an intermediate in organic synthesis. It is also used as an active ingredient in pharmaceutical synthesis and feed auxiliary agent. It is also used as an active pharmaceutical intermediate.