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| CAS No.: | 623-68-7 |
|---|---|
| Name: | Crotonic anhydride |
| Molecular Structure: | |
|
|
|
| Formula: | C8H10O3 |
| Molecular Weight: | 154.166 |
| Synonyms: | 2-Butenoicacid, anhydride (9CI);Crotonic anhydride (6CI,7CI,8CI);2-Butenoic anhydride;Crotonic acid anhydride;NSC 97397;Crotonic Anhydride; |
| EINECS: | 210-807-1 |
| Density: | 1.038 g/cm3 |
| Melting Point: | 72oC |
| Boiling Point: | 247 °C at 760 mmHg |
| Flash Point: | 106.1 °C |
| Hazard Symbols: |
 C
|
| Risk Codes: | 34 |
| Safety: | 26-36/37/39-45 |
| PSA: | 43.37000 |
| LogP: | 1.20840 |
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| Conditions | Yield |
|---|---|
| With 2-chloro-1,3-dimethylimidazolinium chloride; triethylamine In dichloromethane at 20℃; for 18h; Acylation; | 96% |
| With dicyclohexyl-carbodiimide |
| Conditions | Yield |
|---|---|
| With 1,4-dioxane at 70 - 80℃; folgendes Destillieren des Reaktionsgemisches; |
| Conditions | Yield |
|---|---|
| With acetic anhydride |
| Conditions | Yield |
|---|---|
| With dichloromethane; mercury(II) oxide |
- 60-29-7
diethyl ether
- 107-93-7
(E)-but-2-enoic acid
- 927-80-0
1-ethoxyacetylene
- 623-68-7
trans-crotonic anhydride
| Conditions | Yield |
|---|---|
| With diethyl ether |
| Conditions | Yield |
|---|---|
| With oxygen; cobalt(II) acetate; acetic acid at 30℃; unter leichtem Ueberdruck; | |
| With oxygen; copper (I) acetate; acetic acid at 30℃; unter leichtem Ueberdruck; | |
| With oxygen; manganese(II) acetate; acetic acid at 30℃; unter leichtem Ueberdruck; | |
| With oxygen; acetic acid at 30℃; in Gegenwart einer Mischung von Wismut-,Kobalt- und Kupferpulver; |
- 625-35-4, 3488-22-0, 10487-71-5
trans-chrotonyl chloride
- 623-68-7
trans-crotonic anhydride
- 623-68-7
trans-crotonic anhydride
| Conditions | Yield |
|---|---|
| With thionyl chloride; Petroleum ether |
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Chemistry
Chemistry informtion about Crotonic Anhydride (CAS NO.623-68-7) is:
IUPAC Name: [(E)-But-2-Enoyl] (E)-But-2-Enoate
Synonyms: 2-Butenoicacid,Anhydride ; Anhydridkyselinykrotonove ; Crotonicacidanhydride ; Crotonic Anhydride ; 2-Butenoic Anhydride ; Trans-2-Butenoic Anhydride ; 2-Butensureanhydrid ; Crotonsaeureanhydrid
Product Categories: Pharmaceutical Intermediates
MF: C8H10O3
MW: 154.16
EINECS: 210-807-1
Density: 1.038 g/cm3
Flash Point: 106.1 °C
Boiling Point: 247 °C at 760 mmHg
Vapour Pressure: 0.0263 mmHg at 25°C
Enthalpy of Vaporization: 48.41 kJ/mol
Refractive Index: n20/D 1.473(lit.)
Following is the molecular structure of Crotonic Anhydride (CAS NO.623-68-7) is:
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| rat | LD50 | oral | 2830mg/kg (2830mg/kg) | American Industrial Hygiene Association Journal. Vol. 23, Pg. 95, 1962. |
Consensus Reports
Reported in EPA TSCA Inventory.
Safety Profile
Moderately toxic by ingestion. A skin irritant. When heated to decomposition it emits acrid smoke and irritating fumes.
Hazard Codes:
C
Risk Statements:
R34:Causes burns.
Safety Statements:
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
RIDADR: UN 3265 8/PG 3
WGK Germany: 3
RTECS: GQ6125000
HazardClass: 8
PackingGroup III
Specification
To protect yourself, you can put on faceshields, full-face respirator (US), gloves, goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter.