Name | Crotonicanhydride |
Synonyms | Crotonicanhydride Crotonic anhydride CROTONIC ANHYDRIDE 2-Butensureanhydrid 2-Butenoic anhydride CROTONSAEUREANHYDRID 2-butenoic anhydride crotonicacidanhydride but-2-enoic anhydride 2-Butenoicacid,anhydride anhydridkyselinykrotonove (2Z)-but-2-enoic anhydride TRANS-2-BUTENOIC ANHYDRIDE (2E)-but-2-enoic anhydride |
CAS | 623-68-7 |
EINECS | 210-807-1 |
InChI | InChI=1/C8H10O3/c1-3-5-7(9)11-8(10)6-4-2/h3-6H,1-2H3/b5-3+,6-4+ |
Molecular Formula | C8H10O3 |
Molar Mass | 154.17 |
Density | 1.04g/mLat 25°C(lit.) |
Melting Point | -20°C |
Boling Point | 248°C(lit.) |
Flash Point | 231°F |
Solubility | soluble in Ether |
Vapor Presure | 1 hPa (25 °C) |
Appearance | clear liquid |
Color | Colorless to Light orange to Yellow |
Storage Condition | Store below +30°C. |
Refractive Index | n20/D 1.473(lit.) |
Use | Mainly used for the preparation of synthetic resins, plasticizers, drugs, but also for other organic synthesis |
Hazard Symbols | C - Corrosive |
Risk Codes | 34 - Causes burns |
Safety Description | 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.) |
UN IDs | UN 3265 8/PG 3 |
WGK Germany | 3 |
RTECS | GQ6125000 |
HS Code | 2916 19 95 |
Hazard Class | 8 |
Packing Group | III |
Toxicity | LD50 orally in Rabbit: 2061 mg/kg |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
Overview | Crotonic anhydride, also known as butene anhydride. At room temperature for light yellow or colorless liquid, irritating odor, water decomposition, soluble in benzene, acetone and other organic solvents. Industrial production of crotonic anhydride is basically the use of crotonic acid high temperature dehydration method, the process is simple, the technology is mature, but the production cost is high, the yield is low, and produce a large number of difficult to treat waste and wastewater, serious environmental pollution. Now a new process is based on the production of crotonic acid and diketene as raw materials, in the presence of catalyst, reaction at a certain temperature, after product distillation to get Croton anhydride products, the advantages of this process are high yield, good quality, low cost, less three wastes, and good environmental protection. |
Application | crotonic anhydride is an organic chemical intermediate, which is an important organic chemical raw material, in the dye industry is used as fur dyes, reactive dye intermediates; In the cosmetics industry is used as high-grade cosmetics such as skin cream, conditioner, shampoo, cream and other additives; In the pharmaceutical industry as a pharmaceutical antibacterial drugs, raw materials of sulfonamides. Crotonic anhydride can also be used for the preparation of butenoic acid fiber and the synthesis of coal dye, hair dye, color developing agent, epoxy resin curing agent, petroleum additive, rubber antioxidant, etc. mainly used in the preparation of synthetic resins, plasticizers, drugs, also used in other organic synthesis organic chemical intermediates, used in the preparation of butenoic acid fiber. organic chemical intermediate, used in the preparation of fiber. |
spontaneous combustion temperature | 290°C |
toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |